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Top Chemistry MCQS Questions
Q.
Transition temperature for tin grey & tin white is : _____________?
96°C
18°C
128.15°C
246.12°C
Explanation:
The correct answer to the question is: 18°C
Q.
Beillstein test is used for________?
CO
N2
Cl
CO2
Explanation:
The correct answer to the question is: Cl
Q.
Main use of salt in diet is to : ___________?
inclease solubility of food particles in water
increase the taste
produce small amount of hydrochloric acid required for digestion
ease the process of cooking
Explanation:
The correct answer to the question is: produce small amount of hydrochloric acid required for digestion
Q.
Quantum numbers are __________ ?
Numerical values
Leometric values
Arithmetical values
Logical values
Explanation:
The correct answer to the question is: Numerical values
Q.
Hexamethylene diamine and adipic acid combine to form _____________?
Natural rubber
Synthetic rubber
nylon 6-6
Polystyrene
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Which of the following does not give Borax bead test ?
Ni
Cu
A1
Cr
Explanation:
The correct answer to the question is: A1
Q.
The concept of ensemble was introduced by____________?
Mexwell
Carnot
Boltzmann
Gibbs
Explanation:
The correct answer to the question is: Gibbs
Q.
Which of the following is used in photography?
Na2S2O3
Na2SO3
NaHSO3
Na2S
Explanation:
The correct answer to the question is: Na2S2O3
Q.
At higher temperature, Ethyne on reaction with water in the presence of HgSO4 and H2SO4 gives:
Acetone
Acetaldehyde
Ethyl alcohol
Acetic acid
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
The number of molecules taking part in the rate determining step is called___________________?
Extent of a reaction
Mole of a reaction
Rate of reaction
Order of reaction
Explanation:
The correct answer to the question is: Order of reaction
Q.
The Clemmenson reduction of acetone yields
Ethanal
Propane
Propanol
Ethanol
Explanation:
The correct answer to the question is: Propane
Q.
One of the outstanding features of boron is its ability to form__________________?
Molecular crystals
Molecular addition compounds
Ionic compounds
Semiconductors
Explanation:
The correct answer to the question is: Molecular addition compounds
Q.
__________ is one of the allotropic modifications of carbon.
Silicon
Graphite
Iodine
Diamond
Explanation:
The correct answer to the question is: Diamond
Q.
Which of the following statement is correct ?
size of Na atom < Na+ ion
size of Cl atoms > Cl- ion
Cl- < Na+
size of Na+ ion < Na atom
Explanation:
The correct answer to the question is: size of Na+ ion < Na atom
Q.
Basicity of orthophosphoric acid is________?
2
3
4
5
Explanation:
The correct answer to the question is: 3
Q.
Which one of the following carbonate is water insoluble ?
K2CO3
(NH4)2CO3
CaCO3
Na2CO3
Explanation:
The correct answer to the question is: CaCO3
Q.
The molecular formula of Sucrose(Sugar) is___________?
NH
CH
CHO
CHO
Explanation:
The correct answer to the question is: CHO
Q.
Ammonium cynanate was 1st Inorganic compound that was converted into an Organic compound (in Lab) through boiling water. The organic compound was____.
Acetic acid
Ethanol
Urea
Methane
Explanation:
The correct answer to the question is: Urea
Q.
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Resonance effect
Inductive effect
Intermolecular H-bonding
Isomeric effect
Explanation:
The correct answer to the question is: Intermolecular H-bonding
Q.
Which of the following shows inert pair effect ?
boron
tin
silicon
carbon
Explanation:
The correct answer to the question is: tin
Q.
Which one can form complex ?
Cr
Na
K
Li
Explanation:
The correct answer to the question is: Li
Q.
The strongest hydrogen bonding is present in: _____________?
Acetone and chloroform
Ammonia gas
Ethanol
Ice
Explanation:
The correct answer to the question is: Ice
Q.
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Decomposition
Reduction
Oxidation
Both b & c
Explanation:
The correct answer to the question is: Both b & c
Q.
Which one is natron ?
Na2CO3
Na2CO3.H2O
NaHCO3
Na2CO3.10H2O
Explanation:
The correct answer to the question is: Na2CO3.H2O
Q.
Radiations are harmful as it:___________?
is unstable
Causes skin cancer
Causes anemia
Alters body tissue
Explanation:
The correct answer to the question is: Causes skin cancer
Q.
The chemical formula of sodium hypochlorite is________________?
NaClO2
NaClO3
NaCLO
NaClO4
Explanation:
The correct answer to the question is: NaCLO
Q.
Which C-X bond has the highest bond energy per mole ?
C-F
C-Br
C-I
C-C
Explanation:
The correct answer to the question is: C-F
Q.
In water molecule, Hydrogen & water are held together by ______ bond.
Dating
Hydrogen
Covalent
Ionic
Explanation:
The correct answer to the question is: Covalent
Q.
Which of the halogen can displace other three elements ?
Bromine
Iodine
Chlorine
Flourine
Explanation:
The correct answer to the question is: Flourine
Q.
A process in which large molecules are broken up into into smaller molecules is called as_____.
Reforming
Isomerization
Refining
Cracking
Explanation:
The correct answer to the question is: Cracking
Q.
Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
formaldehyde
carbondioxide
propanone
acetaldehyde
Explanation:
The correct answer to the question is: carbondioxide
Q.
The ore CaSO4.H2O has the general name_______________?
Gypsum
Calcite
Dolomite
Plaster of Paris
Explanation:
The correct answer to the question is: Gypsum
Q.
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
oxidation
condensation polymerization
additional polymertization
elimination
Explanation:
The correct answer to the question is: condensation polymerization
Q.
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
None of these
Boyle’s law
Graham’s Law
Gay-Lussac’s law
Explanation:
The correct answer to the question is: Graham’s Law
Q.
Identify the correct statement regarding CO_______________?
it is used to prepare aerated drinks
it reacts with red blood cells of haemoglobin
it combines with H2O to form carbonic acid
it is powerful oxidizing agent
Explanation:
The correct answer to the question is: it reacts with red blood cells of haemoglobin
Q.
Treatment of sucrose with conc. HNO3 gives__________?
Laevulinic acid
Nitrosucrose
Glucose+ fructose
Oxalic acid
Explanation:
The correct answer to the question is: Nitrosucrose
Q.
Ethers show functional group isomerism with __________________?
ketones
alcohols
aldehydes
carboxylic acid
Explanation:
The correct answer to the question is: alcohols
Q.
which of the following is a non-crystalline solid pair?
diamond, wood
sucrose. glass
glass, table salt
wood, glass
Explanation:
The correct answer to the question is: wood, glass
Q.
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
1 mole of butane
2 moles of butane
1 mole of ethane
2 moles of ethane
Explanation:
The correct answer to the question is: 1 mole of butane
Q.
Polyethylene Glycols are used in the preparation of which type of detergents?
Anionic detergents
Non-ionic detergents soap
All of above
Cationic detergents
Explanation:
The correct answer to the question is: Non-ionic detergents soap
Q.
Phenol was isolated by Runge from________________?
vegetable oil
coaltar
wood
none of these
Explanation:
The correct answer to the question is: coaltar
Q.
Out of Alkane, Alkene & Alkyne, which one is more acidic?
All have same
Alkane
Alkyne
Alkene
Explanation:
The correct answer to the question is: Alkyne
Q.
The coloured glassy mass in borax bead test is due to the formation of___________________?
metal meta borate
metal silicate
metal boride
metal borate
Explanation:
The correct answer to the question is: metal meta borate
Q.
The radiations with highest speed are _______.
Alpha radiations
Beta radiations
AOT
Gamma radiations
Explanation:
The correct answer to the question is: Gamma radiations
Q.
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
Quenching
Annealing
Nitriding
Tempering
Explanation:
The correct answer to the question is: Annealing
Q.
If volumetric analysis methyl orange indicator is used when_________?
Acid is strong base is weak
Acid is strong
Bade is strong
Acid is weak
Explanation:
The correct answer to the question is: Acid is strong
Q.
The weight of a metal of equivalent of 12 which will give 0.475g of its chloride is_______?
0.18g
0.12g
0.24g
0.16g
Explanation:
The correct answer to the question is: 0.18g
Q.
Which of the following aqueous solutions would have the highest boiling point?
0.25 m sucrose
0.15 m CaCl2
0.20 m glucose
0.20 m NaCl
Explanation:
The correct answer to the question is: 0.15 m CaCl2
Q.
The formula of palmitic acid_________________?
C15H31COOH
C13H27COOH
C17H33COOH
C17H35COOH
Explanation:
The correct answer to the question is: C15H31COOH
Q.
Which one of the following is not an alkali metal ?
Francium
Rubidium
Radium
Caesium
Explanation:
The correct answer to the question is: Radium
Q.
Who discovered carbohydrates fats and proteins?
Anselme Payen
Jons Jacob Berzelius
Walter Bradford Cannon
William Prout
Explanation:
The correct answer to the question is: William Prout
Q.
During electrolysis of Water, the product obtained at cathode is ___________?
Hydrogen Gas &Water
Only Water
Oxygen Gas &Water
Only oxygen
Explanation:
The correct answer to the question is: Hydrogen Gas &Water
Q.
Which of the following is the weakest reducing agent ?
HF
HC
HI
HBr
Explanation:
The correct answer to the question is: HF
Q.
During sulphonation of benzene H2SO4 generates the electrophile _________________?
HSO4-
H+
SO2
SO3
Explanation:
The correct answer to the question is: SO3
Q.
Size of colloidal particles
None of These
greater than suspension
greater than true solution
In b/w true solution & suspension
Explanation:
The correct answer to the question is: In b/w true solution & suspension
Q.
Which of the following statements is incorrect about fluorine_______________?
fluorine has lowest dissociation energy among the halogens
fluorine follows octet rule and as well as extended octet rule
both B and C
fluorine is restricted to -1 oxidation state
Explanation:
The correct answer to the question is: both B and C
Q.
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
acetic acid
methanoic acid
ethanol
carbonic acid
Explanation:
The correct answer to the question is: acetic acid
Q.
Antiseptic Urotropine formed by ____________?
Formaldehyde
Ketone
Carboxylic acid
Acetaldehyde
Explanation:
The correct answer to the question is: Formaldehyde
Q.
Hydrogenolysis results in the formation of________________?
alkane
aldehydes
alkene
alkyne
Explanation:
The correct answer to the question is: alkane
Q.
Which of the following reaction is not shown by ketones ?
reaction with NaHSO3
reaction with Fehling solution
reaction with HCN
reaction with 2 4 dinitrophenyl hydrazine
Explanation:
The correct answer to the question is: reaction with Fehling solution
Q.
Which one is Chloroform_________________?
CHCl3
CCl4
CH3Cl
CH2Cl2
Explanation:
The correct answer to the question is: CHCl3
Q.
Which of the following is not the name of any scientist?
Le-Chatelier’s principle
Hund’s rule
Aufbau’s principle
Pauli exclusion principle
Explanation:
The correct answer to the question is: Aufbau’s principle
Q.
Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?
Friedel & Craft acylation
Friedel & Craft alkylation
Clemmenson reduction
Dows process
Explanation:
The correct answer to the question is: Friedel & Craft alkylation
Q.
Methyl alcohol is not used__________________?
As a solvent
For denaturing of ethyl alcohol
As an antifreezing agent
As a substitute for petrol
Explanation:
The correct answer to the question is: As a substitute for petrol
Q.
Phonon is Quantum of___________?
Elastic wave
Transverse wave
Longitudinal wave
Electromagnetic wave
Explanation:
The correct answer to the question is: Elastic wave
Q.
Aluminium oxide is_________________?
It does not exists
Acidic oxide
Amphoteric oxide
Basic oxide
Explanation:
The correct answer to the question is: Amphoteric oxide
Q.
Which one of the following is also known as lactic acid ?
3-Hydroxy propanoic acid
2-Hydroxy propanoic acid
2-hydroxy butanoic acid
3-hydroxy butanoic acid
Explanation:
The correct answer to the question is: 2-Hydroxy propanoic acid
Q.
How much solar flux absorb by earth’s surface is used to drive hydrologic cycle:
1/3rd
1/5th
1/2sec
1/4th
Explanation:
The correct answer to the question is: 1/3rd
Q.
Ncleophilic addition reactions are catalysed__________________?
Both A and B
Base
Acid
None
Explanation:
The correct answer to the question is: Both A and B
Q.
Oxidation state +1 for phosphorous is found in___________?
H3PO4
H3PO2
H3PO3
H2P2O7
Explanation:
The correct answer to the question is: H3PO2
Q.
In Dry cell, cathode is made up of_______?
Carbon (Graphite)
MnO²(Pyrolusite)
ZnCl²
Zinc
Explanation:
The correct answer to the question is: Carbon (Graphite)
Q.
Which one of the following is termed as benzul alcohol ?
C6H5CH(OH)2
C6H5CH2OH
C6H5OH
C6H5COOH
Explanation:
The correct answer to the question is: C6H5CH2OH
Q.
Which of the following substances does not give iodoform test ?
acetaldehyde
ethyl alcohol
methyl alcohol
acetone
Explanation:
The correct answer to the question is: methyl alcohol
Q.
The purpose of Smelting an ore is to________?
Obtain an alloy
Separate volatile impurities
Reduce it
Oxidize it
Explanation:
The correct answer to the question is: Reduce it
Q.
On reduction with LiAlH4 ,Ketone gives__________?
Secondary Alcohol
Tertiary alcohol
None of These
Primary Alcohol
Explanation:
The correct answer to the question is: Secondary Alcohol
Q.
Which one of the following methods will not give benzene ?
Distilling phenol with Zn dust
Hydrolysis of benzene sulphonic acid with super heated steam
Heating sod. Salt of Benzoic acid with soda lime
Chlorobenzene with NaOH at 360°C & 150atm.
Explanation:
The correct answer to the question is: Chlorobenzene with NaOH at 360°C & 150atm.
Q.
Bromine can be liberated from KBr solution by the action of _______________?
Iodine solution
Chlorine
NaCl
Ki
Explanation:
The correct answer to the question is: Chlorine
Q.
Methyl radical is ___________?
Sp2 hybrid having 6 electron
Sp3 hybrid having 8 electrons
Sp hybrid having linear geometry
sp2 hybrid having 7 electron
Explanation:
The correct answer to the question is: sp2 hybrid having 7 electron
Q.
Give Electronic configuration of Sodium:
None of these
1s2,2s2,2p6
1s2,2s2,2p6,3s2
1s2,2s2,2p6,3s1
Explanation:
The correct answer to the question is: 1s2,2s2,2p6,3s1
Q.
The most electronegative element among the following is_________________?
Sb
As
P
N
Explanation:
The correct answer to the question is: N
Q.
A theoretical link between quantum mechanics and thermodynamics is_________?
Soectroscopic analysis
Electrchemistry
Statistical thermodynamics
Matrix mechanics
Explanation:
The correct answer to the question is: Statistical thermodynamics
Q.
Which of the following has lowest lattice energy?
KBr
LiF
NaCl
CsI
Explanation:
The correct answer to the question is: CsI
Q.
Ketones and Aldehydes are differentiate by using ______________?
Fehling solution
Silver Mirror test
Nitroprusside test
Bendict solution
Explanation:
The correct answer to the question is: Nitroprusside test
Q.
Nitration of chlorobenzene gives___________________?
o – chloronitrobenzene
A & B
m – chloronitrobenzene
p – chloronitrobenzene
Explanation:
The correct answer to the question is: A & B
Q.
What is the molecular Weight of Nitric acid (HNO3 ) ?
65.012 g/mol
81.011 g/mol
63.012 g/mol
70.012 g/mol
Explanation:
The correct answer to the question is: 63.012 g/mol
Q.
Which of the following will be acidic_____________?
1-butyne
ethyne
all of the above
propyne
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following is soluble in water?
AgF
AgBr
AgI
AgCl
Explanation:
The correct answer to the question is: AgF
Q.
How many electrons are there in benzene to form delocalized electron cloud________________?
6
3
4
8
Explanation:
The correct answer to the question is: 6
Q.
Which of the following is different with respect to physical appearance ?
Bismuth
Antimony
Arsenic
Phosphorus
Explanation:
The correct answer to the question is: Phosphorus
Q.
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
iso-alkane
branched-alkane
normal-alkane
neo-alkane
Explanation:
The correct answer to the question is: iso-alkane
Q.
Molozonide is unstable and changes into ozonide on_________________?
reduction
rearrangement
hydrolysis
oxidation
Explanation:
The correct answer to the question is: rearrangement
Q.
Which one of following is not a property of pure quartz ?
Hard
Brittle
All of above
Coloured solid
Explanation:
The correct answer to the question is: Coloured solid
Q.
SO2 reacts with Cl in sunlight to form__________?
Sulphuryl chloride
Sulphur dioxide
All of the above
Suphanyl chloride
Explanation:
The correct answer to the question is: Sulphuryl chloride
Q.
The IUPAC suffix used for _______ NC group?
Nitrile
Cyanide
Isocyanides
Carbylamines
Explanation:
The correct answer to the question is: Nitrile
Q.
Identify among the following elements that does NOT belong to VIIA group
N
Br
F
Cl
Explanation:
The correct answer to the question is: N
Q.
The theory which explains the behavior of particles of matter in motion is called ______?
Dalton’s Theory
Kinetic Molecular Theory
None
Bohr’s Theory
Explanation:
The correct answer to the question is: Kinetic Molecular Theory
Q.
The range of acid PH on PH scale is____________?
1 to 10
9 to 8
1 to 6
6 to 7
Explanation:
The correct answer to the question is: 1 to 6
Q.
Which of the following is a symmetrical ketone___________________?
butanone
2-pentanone
3 – hexanone
acetone
Explanation:
The correct answer to the question is: acetone
Q.
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
Bromine
Sulphur
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Sulphur
Q.
Among the halogens the rare element is________________?
Chlorine
Iodine
Fluorine
Astatine
Explanation:
The correct answer to the question is: Astatine
Q.
An organic compound has a triple bond and not double bond. It can be tested by __________?
Bromine water
Bayer’s reagent
Fehling solution
Ammonical silver nitrate
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
The system which exchange only energy with its surroundings is called______________?
closed system
Isolated system
Open system
All of the above
Explanation:
The correct answer to the question is: closed system
Q.
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
Four times
Same
Double
Half
Explanation:
The correct answer to the question is: Double
Q.
Cyclone collector is used for minimizing:____________-?
Air pollution
Water pollution
Sound pollution
Soil pollution
Explanation:
The correct answer to the question is: Air pollution
Q.
Which of the following noble gases is not present in atmosphere?
Xenon
Argon
Helium
Radon
Explanation:
The correct answer to the question is: Radon
Q.
Which of the following is not use of compounds of Fluorine________________?
None of the above
Sodium fluoroacetate is a rat poison
SbF3 is used for manufacture of pottery
Cu F2 is used in ceramic industry
Explanation:
The correct answer to the question is: None of the above
Q.
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
To produce alloy
As nitrometer
To remove air bubbles from molten metal
As insulator
Explanation:
The correct answer to the question is: To remove air bubbles from molten metal
Q.
Gypsum is applied to the soil as a source of________________?
we could not apply
Ca and S
Ca and P
S and P
Explanation:
The correct answer to the question is: Ca and S
Q.
Which of the following is more acidic in nature?
Benzene
Cresol
Phenol
Aniline
Explanation:
The correct answer to the question is: Phenol
Q.
The number of lone pairs in XeOF4 is_________?
1
O
3
2
Explanation:
The correct answer to the question is: 1
Q.
Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?
Nitrogen oxides
Free radicals
UV -rays
Cosmic rays
Explanation:
The correct answer to the question is: UV -rays
Q.
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
C6H12O6
C2H5O
C6H18O3
C2H6O
Explanation:
The correct answer to the question is: C6H18O3
Q.
Biodegradable pollutant is:_____________?
Domestic waste
Aluminum foil
DDT
mercury salt
Explanation:
The correct answer to the question is: Domestic waste
Q.
Azimuthal quantum number defines___________?
Spin of an electron
Angular momentum of an electron
e/m ratio of an electron
Magnetic momentum of an electron
Explanation:
The correct answer to the question is: Angular momentum of an electron
Q.
The product On the oxidation of 2°Alcohol is ________?
Ketone
Aldehyde
Carboxylic acid
Ester
Explanation:
The correct answer to the question is: Ketone
Q.
Reading of a Barometer going down is an indication of:___________?
Intense heat
Snow
Rainfall
Storm
Explanation:
The correct answer to the question is: Rainfall
Q.
Gypsum is______?
CaSO4.1/2H2O
CaSO4.3H2O
CaSO4
CaSO4,2H2O
Explanation:
The correct answer to the question is: CaSO4,2H2O
Q.
BeCl2 has the hybrid orbitaks of type_______?
dsp2
Sp3
Sp
Sp2
Explanation:
The correct answer to the question is: Sp
Q.
Those aliphatic hydrocarbons which contain carbon to carbon single covalent bond in the chain are called ___________?
Alkenes
Alkynes
Alkanes
a & c
Explanation:
The correct answer to the question is: Alkanes
Q.
Cassiterite is an ore of_______?
Mn
Sn
Sb
Ni
Explanation:
The correct answer to the question is: Sn
Q.
Identify the Molecular mass for Glucose (C6H12O6) among the following.
190amu
98amu
180amu
188amu
Explanation:
The correct answer to the question is: 180amu
Q.
Mass spectroscopy mainly tells about ____________?
Mass
None of These
Isotopes
e/m ratio
Explanation:
The correct answer to the question is: e/m ratio
Q.
Absolute alcohol is obtained when rectified spirit is treated with__________________?
CaCO3
Ca(OH)2
CaO
CaCl2
Explanation:
The correct answer to the question is: CaO
Q.
The process of aluminium extraction is called__________________?
Thermite process
Haber process
Contact process
Hall process
Explanation:
The correct answer to the question is: Hall process
Q.
Ozonolysis of benzene produces___________________?
Glyoxal
Vicinal diol
Glycol
Both B & C
Explanation:
The correct answer to the question is: Glyoxal
Q.
Atom is the smallest particall which is_________?
Divisible
Indivisible
Non of these
Both
Explanation:
The correct answer to the question is: Indivisible
Q.
Kipps Apparatus is used to prepare_________?
Cl²
H²S
NaOH
Cu
Explanation:
The correct answer to the question is: H²S
Q.
Which of the following haloalkane is hydrolysed by SN1 mechanism?
(CH3)3CBr
CH3CH2Br
CH3Br
CH3CH2CH2Br
Explanation:
The correct answer to the question is: (CH3)3CBr
Q.
Effective volume is usually taken for ____________ ?
5 moles of gas
1 mole of gas
2 moles of gas
3moles of gas
Explanation:
The correct answer to the question is: 1 mole of gas
Q.
Aqueous solution of borax above 62°C gives crystals of________________?
Na2B4O7.5H2O
Na2B4O7.10H2O
Na2B4O7.4H2O
Na2B4O7.2H2O
Explanation:
The correct answer to the question is: Na2B4O7.5H2O
Q.
What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?
None of the above
1.67 g/L
1.68 g/L
1.65 g/L
Explanation:
The correct answer to the question is: 1.68 g/L
Q.
Which of the following element has the maximum electron affinity_____?
Br
I
Cl
F
Explanation:
The correct answer to the question is: Cl
Q.
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
50%
60%
8%
52%
Explanation:
The correct answer to the question is: 52%
Q.
During Electrolysis of Water the product @cathode obtained is ___________?
CO & Water
Hydrogen & Carbon monoxide
Oxygen Gas & Water
Hydrogen Gas & Water
Explanation:
The correct answer to the question is: Hydrogen Gas & Water
Q.
The method in which more steam is passed through the water Gas to oxidize CO to Carbon Dioxide which is then more soluble in water than Hydrogen gas and gets separated is called______.
Thermal decomposition
Fragmentation
liquification process
Bosch Process
Explanation:
The correct answer to the question is: Bosch Process
Q.
Chemistry is given from ……language ?
None of these
Arabic
Greek
Latin
Explanation:
The correct answer to the question is: Greek
Q.
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
O
H2O
OH-
H+
Explanation:
The correct answer to the question is: H2O
Q.
When limestone reacts with water, which gas is released?
Nitrogen
Oxygen
Hydrogen
Carbon Dioxide
Explanation:
The correct answer to the question is: Carbon Dioxide
Q.
Which one of the following results in the discovery of proton.
Alpha rays
Cathode rays
Canal rays
X-rays
Explanation:
The correct answer to the question is: Canal rays
Q.
Downs cell is used to prepare_________________?
Sodium hydroxide
Sodium bicarbonate
Sodium carbonate
Sodium metal
Explanation:
The correct answer to the question is: Sodium metal
Q.
Aniline is a derivative of benzene which contains__________________?
Amino group
Nitro group
Amide group
Imino group
Explanation:
The correct answer to the question is: Amino group
Q.
Which of the elements show passivity when treated with conc. HNO3?
Fe
All of the above
Cr
A
Explanation:
The correct answer to the question is: All of the above
Q.
Special features of borate glass is that it is_________________?
Low melting
Heat resistant
Used to prepare chemical garden
Green in colour
Explanation:
The correct answer to the question is: Heat resistant
Q.
The carbon atom of carbonyl group is__________________?
dsp2 hybridized
cp3 hybridized
sp hybridized
sp2 hybridized
Explanation:
The correct answer to the question is: sp2 hybridized
Q.
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
Secondary alcohol
Primary alcohol
All of above
Tertiary alcohol
Explanation:
The correct answer to the question is: Tertiary alcohol
Q.
Example of linear polymer is ______________?
PVC
both A and C
High density polythene
Low density polythene
Explanation:
The correct answer to the question is: both A and C
Q.
Dehalogenation of ethyl tetrahalide will give____________________?
ethene
ethyl halide
ethyne
all of the above are possible
Explanation:
The correct answer to the question is: ethyne
Q.
The maximum amount of product obtained by balanced chemical equation is called as __________?
NOT
Theoretical yield
Actual yield
Practical yield
Explanation:
The correct answer to the question is: Theoretical yield
Q.
K2Cr2O7/H2SO4 generate____________________?
Oxygen
Nascent hydrogen[H]
Hydrogen
Nascent oxygen[O]
Explanation:
The correct answer to the question is: Nascent oxygen[O]
Q.
The science of fermentation is called _______ ?
Zymurgy
Zymology
Zygology
Zootaxy
Explanation:
The correct answer to the question is: Zymology
Q.
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
formaldehyde
ethylene epoxide
both A & C
ketone
Explanation:
The correct answer to the question is: both A & C
Q.
What is the mass of one mole of Iodine?
254g
127g
74g
53g
Explanation:
The correct answer to the question is: 254g
Q.
The formula C6H5-CO-CH3 represents_______ ?
Acetophenone
Acetic acid
Acetone
Phenyl acetate
Explanation:
The correct answer to the question is: Acetophenone
Q.
Which of the following is used with milk of lime to kill fungus and molds?
Copper Sulfate
Silver nitrate
Nitric acid
Chlorine
Explanation:
The correct answer to the question is: Copper Sulfate
Q.
The stationary and mobile phases in paper chromatography are____________?
Liquid/gas
Liquid/solid
Liquid/liquid
Solid/liquid
Explanation:
The correct answer to the question is: Solid/liquid
Q.
R-Mg-Br is called___________________?
Both A & B
Alkyl
Grignard reagent
Metallic alkyl halide
Explanation:
The correct answer to the question is: Both A & B
Q.
Benzene does not undergo___________________?
Polymerization reactions
Oxidation reactions
Substitution reaction
Addition reaction
Explanation:
The correct answer to the question is: Polymerization reactions
Q.
When alcohol reacts with phosphorous halides it geive____________________?
alkynes
alkyl amine
alkyl halides
alkanes
Explanation:
The correct answer to the question is: alkyl halides
Q.
The bond length of C=C is___________?
1.68A°
1.54A°
1.34A°
1.20A°
Explanation:
The correct answer to the question is: 1.68A°
Q.
Universe is almost 70% made up of __________?
Hydrogen
Chlorine
Helium
Carbon
Explanation:
The correct answer to the question is: Hydrogen
Q.
Which of the following is unit of Viscosity?
Torr
Poise
Decibell
Hertz
Explanation:
The correct answer to the question is: Poise
Q.
Fehling solution react with HCHO to form precipitate of _____________?
Yellow colour
White colour
Blue colour
Red colour
Explanation:
The correct answer to the question is: Red colour
Q.
Nitronium ion is___________________?
NO2-
NO2+
NO
NO3
Explanation:
The correct answer to the question is: NO2+
Q.
Silver mirror is a test for ____________?
Amines
Ethers
Aldehydes
Thio alcohols
Explanation:
The correct answer to the question is: Aldehydes
Q.
What is the formula of Copper Sulfate?
CuSO3.5H2O
CuSO3.4H2O
CuSO4.4H2O
CuSO4.5H2O
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
Vander Waals forces are stronger in_______________?
Cl2
F2
I2
Br2
Explanation:
The correct answer to the question is: I2
Q.
Element that have same number of neutrons are called__________?
None of these
isotone
isobar
isotope
Explanation:
The correct answer to the question is: isotone
Q.
Which one of the following compound does not have – OH group___________________?
ethyl acetate
glycerol
ethylene glycol
picric acid
Explanation:
The correct answer to the question is: ethyl acetate
Q.
The halogen having highest electron affinity is_____________________?
Bromine
Fluorine
Iodine
Chlorine
Explanation:
The correct answer to the question is: Chlorine
Q.
The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
Zn / HCI
PCI5
PCI3
SOCl2 / Pyridine
Explanation:
The correct answer to the question is: SOCl2 / Pyridine
Q.
The deliquescence is a property in which a solid____________________?
Absorbs moisture and turns to liquid form
Increases the number of water of crystallization
Absorbs moisture and remains solid
Loses water of crystallization
Explanation:
The correct answer to the question is: Absorbs moisture and turns to liquid form
Q.
The general formula for alkenes is:______________?
CnH2n+2
CnH2n
CnH2n-2
CnH2n+1
Explanation:
The correct answer to the question is: CnH2n
Q.
Oxalate ion behaves as a ________ ligand.
Tridentate
Bidentate
Hexadentate
Unidentate
Explanation:
The correct answer to the question is: Bidentate
Q.
Clemmensens reduction infolves the reduction of___________________?
all of the above
alkane
ketone
aldehyde
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following does not contain phosphorus ?
Steel
Nerves
Bone
Yolk of egg
Explanation:
The correct answer to the question is: Steel
Q.
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
Carbon= +1, Oxygen= -1
Carbon=0, Oxygen=0
Carbon= -1, Oxygen= +1
Carbon=0, Oxygen= -1
Explanation:
The correct answer to the question is: Carbon= -1, Oxygen= +1
Q.
For the generation of biogas, the materials commonly used are__________?
Animal wastes
Aquatic plants
Forest residues
None of these
Explanation:
The correct answer to the question is: Animal wastes
Q.
Electrolysis of dilute solution of NaCl results at the anode_______________?
hydrogen
chlorine
oxygen
sodium
Explanation:
The correct answer to the question is: oxygen
Q.
The Boiling Point of Ethyl Alcohol is_________?
56°C
78°C
58°C
73°C
Explanation:
The correct answer to the question is: 78°C
Q.
Nitrates of which pair of elements give different products on thermal decomposition ?
Li Na
Li Ca
Mg Ca
Na K
Explanation:
The correct answer to the question is: Li Na
Q.
Example of copolymers is _____________?
nylon 6-6
Polyethylene
Orlon
PVC
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
None of these
Hydrogen tank
Nitrogen tank
Oxygen tank
Explanation:
The correct answer to the question is: Oxygen tank
Q.
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
propanol
propane
propanoic acid
propanal
Explanation:
The correct answer to the question is: propanoic acid
Q.
Methanol can be obtained from_________________?
destructive distillation of wood
all
water gas
methane
Explanation:
The correct answer to the question is: all
Q.
An acid-Base Reaction is always a/an __________?
Endothermic
Exothermic
Fusion
Fission
Explanation:
The correct answer to the question is: Exothermic
Q.
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Graham’s Law
Boyle’s law
Charles’ Law
Avogadro’s Law
Explanation:
The correct answer to the question is: Charles’ Law
Q.
Arsenic oxides are removed by passing through_________________?
Aluminium hydroxide
Ferric hydroxide
Calcium hydroxide
Sodium hydroxide
Explanation:
The correct answer to the question is: Ferric hydroxide
Q.
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
primary alcohol
dihydric alcohol
tertiary alcohol
secondary alcohol
Explanation:
The correct answer to the question is: primary alcohol
Q.
Which compound is also known by the name of carbolic acid ?
C6H5OH
H2CO3
H3PO3
C2H2OH
Explanation:
The correct answer to the question is: C6H5OH
Q.
The blotting paper helps observe liquid by__________?
Capillary Action
Boldness
Surface Action
Viscosity
Explanation:
The correct answer to the question is: Capillary Action
Q.
Which group contains elements that exist as monoatomic molecule?
2
1
18
14
Explanation:
The correct answer to the question is: 18
Q.
The ether used in Wurtz synthesis is__________________?
aqueous
acidic
basic
dry
Explanation:
The correct answer to the question is: dry
Q.
Bosch Process involves _______?
Isomerization
Oxidation
Reduction
Crackling
Explanation:
The correct answer to the question is: Oxidation
Q.
Value of normal atmospheric pressure at sea level at 0°C is______?
All of these
76cm of Hg
1 atm
760 Torr
Explanation:
The correct answer to the question is: All of these
Q.
d-block elements are also called as __________?
Alkali Metals
Inner Transition
Both B & C
Outer Transition
Explanation:
The correct answer to the question is: Outer Transition
Q.
The carbon-carbon bond strength is maximum in__________?
CH2=CH2
CH3CH3
Benzene
Cyclohexane
Explanation:
The correct answer to the question is: CH3CH3
Q.
The criteria for aromaticity is presence of_________?
Presence of 4n+2π electrons
Presence of 4nπ electrons
Cyclic structure
Unsaturations
Explanation:
The correct answer to the question is: Presence of 4n+2π electrons
Q.
Which set of quantum numbers is not allowed?
n=2,l=2,m1=1,ms=-1/2
n=2,l=0,m1=0,ms=-1/2
n=2,l=1,m1=-1,ms=+1/2
n=2,l=1,m1=0,ms=+1/2
Explanation:
The correct answer to the question is: n=2,l=2,m1=1,ms=-1/2
Q.
Which of the following orbitals has maximum penetration effect?
S
f
P
d
Explanation:
The correct answer to the question is: S
Q.
Which one of the following species is not an electrophile ?
BF3
H+
Br+
NH3
Explanation:
The correct answer to the question is: NH3
Q.
Compounds of nitrogen and phosphorus are mostly________________?
all varieties are possible
polar
ionic
covalent
Explanation:
The correct answer to the question is: covalent
Q.
Which one of the following is not the use of graphite ?
Electrode of electrolytic cell
Lead pencils
Lubricant
Abrasive
Explanation:
The correct answer to the question is: Abrasive
Q.
Which one of the following acids is present in lemon juice ?
Citric acid
Oxalic acid
Tartaric acid
Benzoic acid
Explanation:
The correct answer to the question is: Citric acid
Q.
What is chemical symbol for Tungsten?
Tn
T
W
Z
Explanation:
The correct answer to the question is: W
Q.
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
Both A and B
steric hindrance
none
alkyl groups are electron donating
Explanation:
The correct answer to the question is: Both A and B
Q.
Shiff’s reagent gives pink color with ____________?
Acetic acid
Acetaldehyde
Acetone
Methyl acetate
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
Which of the following compounds is not soluble in HNO3___?
CuS
PbS
CdS
AgCl
Explanation:
The correct answer to the question is: AgCl
Q.
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?
0.6N HSO
4.6 gram of CHOH
1.8 gram of HO
12 moles of KMnO
Explanation:
The correct answer to the question is: 12 moles of KMnO
Q.
Octane rating of Gasoline can be increased by __________?
Cracking
Refining
None of These
Reforming
Explanation:
The correct answer to the question is: Reforming
Q.
Actinides are the elements with atomic number from:
89 to 103
101 to 115
97 to 104
36 to 43
Explanation:
The correct answer to the question is: 89 to 103
Q.
Which one of the following compounds usually smells like garlic ?
P2O3
All have same smell
H3PO3
P2O5
Explanation:
The correct answer to the question is: P2O3
Q.
What is the molecular formula of Benzenetriozonide ?
C6H5O9
C6H6O6
C6H6O9
C6H5O8
Explanation:
The correct answer to the question is: C6H6O9
Q.
Addition of 2% gypsum in cement________________?
Triggers hydration
Triggers hydrolysis
all of the above
Prevents rapid hardening
Explanation:
The correct answer to the question is: Prevents rapid hardening
Q.
Neoprene is _______________?
synthetic rubber
Vulcanized rubber
All of the above
Natural rubber
Explanation:
The correct answer to the question is: synthetic rubber
Q.
SO3 is not absorbed in water directly because__________________?
Dilute acid is produced
Reaction is exothermic
It is insoluble in water
All of above
Explanation:
The correct answer to the question is: Reaction is exothermic
Q.
Sum of protons and neutrons in an atom gives off _________ ?
Both A and B
Atomic number
Nucleon numbera
Mass number
Explanation:
The correct answer to the question is: Both A and B
Q.
For the reaction 2HI ____________> H2+ I2
Kc > kp
Kp > kc
Kp= kc
Kp ≤ kc
Explanation:
The correct answer to the question is: Kp= kc
Q.
In SI base units, 1 Bq is equal to __________ ?
1.5 disintegration per second
1 disintegration per second
0.01 disintegration per second
10 disintegration per second
Explanation:
The correct answer to the question is: 1 disintegration per second
Q.
If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
Extra heat is spread in the air
The forces of attractions become stronger
High energy molecules continuously leaving the surface of liquid
The vapour pressure of the boiling liquid becomes greater than the external pressure
Explanation:
The correct answer to the question is: High energy molecules continuously leaving the surface of liquid
Q.
Which of the following noble gases is abundant in air?
Neon
Methane
Argon
Helium
Explanation:
The correct answer to the question is: Argon
Q.
Which is methyl cyanide_________________?
CH3NO2
CH3CN
CH3NH2
CH2 = CH – CN
Explanation:
The correct answer to the question is: CH3CN
Q.
Carboxylic acid on reduction with HI / phosphorous yields_________________?
alkane
alcohols
ketones
aldehydes
Explanation:
The correct answer to the question is: alkane
Q.
Cyclopentene is a _________?
Aromatic
None of These
Aliphatic
Alicyclic
Explanation:
The correct answer to the question is: Alicyclic
Q.
Atoms of all the elements always contain in nucleus:
Proton and neutron
Neutron
Neutron and electron
Proton
Explanation:
The correct answer to the question is: Proton
Q.
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
cyclohexane
cyclohexanol
n – hexane
1 – hexanol
Explanation:
The correct answer to the question is: cyclohexanol
Q.
Which of the following is known as absolute zero?
-273.16C°
0C°
273.16C°
273K
Explanation:
The correct answer to the question is: -273.16C°
Q.
Nitrate (NO3) ions are obtained by the process of __________?
Nitrification
None of these
Denitrification
Fermentation
Explanation:
The correct answer to the question is: Nitrification
Q.
Coinage metals are actually_________?
Alkali metals
Transition metals
Halogens
Alkaline earth metals
Explanation:
The correct answer to the question is: Transition metals
Q.
What is the chemical symbol of “Potassium”?
Pt
Po
P
K
Explanation:
The correct answer to the question is: K
Q.
Vulcanized rubber is an example of ______________?
Natural polymers
None of These
semisynthetic polymers
Synthetic polymers
Explanation:
The correct answer to the question is: semisynthetic polymers
Q.
The second nuclear weapons used in warfare over Nagasaki, Japan, contain energy equal about of TNT?
30 kilotons
1.5 kilotons
20 kilotons
25 kilotons
Explanation:
The correct answer to the question is: 20 kilotons
Q.
Process used to separate insoluble particles from liquids is ___________ ?
Sieving
Drying
Extraction
Filtration
Explanation:
The correct answer to the question is: Filtration
Q.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
Smaller ionic radius of these metals
Smaller electronegativity of alkali metals
Excitation of electrons from low energy levels to higher energy levels
De-excitation of electrons from higher energy levels to low energy level
Explanation:
The correct answer to the question is: De-excitation of electrons from higher energy levels to low energy level
Q.
Boron is non-netal whereas A1 is metal. It is due to_______________________?
Small size
No authorized justification yet
Both A and B
High nuclear charge
Explanation:
The correct answer to the question is: Both A and B
Q.
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
200°C
546 K
273 K
546 °C
Explanation:
The correct answer to the question is: 546 K
Q.
Oxygen and sulphur resemble in all except________________?
Show allotropy
Show same oxidation state
Polymeric
Electronic conviguration of valence shell electrons
Explanation:
The correct answer to the question is: Show same oxidation state
Q.
Phosphoric acid is a weak acid and its basicity is____________________?
3
2
1
zero
Explanation:
The correct answer to the question is: 3
Q.
Viscosity of a liquid________by increasing temperature?
Increases
Remains same
Decreases
None
Explanation:
The correct answer to the question is: Decreases
Q.
Presence of nitrogen in organic compounds is tested as__________?
NH3
CN‾
NO
Nitrogen gas
Explanation:
The correct answer to the question is: CN‾
Q.
Water molecule is________?
Angular
Triangular planer
V-shaped
Pyramidal
Explanation:
The correct answer to the question is: V-shaped
Q.
Which of the following method is used to separate Hydrogen gas from water Gas?
Steam process
Cyber Twinkling process
Bosch Process
Palladium process
Explanation:
The correct answer to the question is: Bosch Process
Q.
which of the following pair is not distinguished by passing H2S?
As, CD
Cd , Pb
Zn, Mn
Hg, Pb
Explanation:
The correct answer to the question is: Hg, Pb
Q.
The petrol having octane number 80 has ____________?
80% n-heptane + 20% n- octane
20% n- heptane + 80% n-octane
80% n- heptane + 20% iso-octane
20% n- heptane + 80% iso-octane
Explanation:
The correct answer to the question is: 20% n- heptane + 80% iso-octane
Q.
Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
CHCHCHO + CHCOOH
CHCOOH + CO
CHCHCOOH + CHCOOH
CHCHCHO + CHCHO
Explanation:
The correct answer to the question is: CHCHCOOH + CHCOOH
Q.
Carnalite has chemical formula__________________?
Na2B4O7.10H2O
KCI.MgCl2.6H2O
KCI
CaCO3.MgCO3
Explanation:
The correct answer to the question is: KCI.MgCl2.6H2O
Q.
Allotropic form of phosphorus that is poisonous is___________________?
White
Black
Red
Violet
Explanation:
The correct answer to the question is: White
Q.
Dry distillation of calcium acetate results in the formation of_________________?
formaldehyde
methane
acetone
acetaldehyde
Explanation:
The correct answer to the question is: acetone
Q.
The quality of petrol is improved by ____________?
Refining
Cracking
Hydration
Reforming
Explanation:
The correct answer to the question is: Reforming
Q.
In the presence of Zn, Hydrolysis of ozonide of 1-butene gives:_____________?
Acetaldehyde only
Ethylene only
Propionaldehyde and Formaldehyde
Acetaldehyde and Formaldehyde
Explanation:
The correct answer to the question is: Propionaldehyde and Formaldehyde
Q.
Alkenes are produced from dehalogenation of________________?
vicinal trihalo alkane
dihalo alkane
trihalo alkane
vicinal dihalo alkane
Explanation:
The correct answer to the question is: vicinal dihalo alkane
Q.
The hybridization of nitrogen atom in pyridine is_______?
It is not hybridized
Sp
Sp2
Sp3
Explanation:
The correct answer to the question is: Sp2
Q.
Ammonia may be prepared by heating ammonium chloride with_______________?
H2SO4
Aqueous sodium hydroxide
NaCl
Water
Explanation:
The correct answer to the question is: Aqueous sodium hydroxide
Q.
The type of hybridisation of boron in diborane is______?
Sp3- hybridisation
Sp2- hybridisation
Sp3d2- hybridisation
Sp- hybridisation
Explanation:
The correct answer to the question is: Sp- hybridisation
Q.
The gas used in manufacturing of urea fertilizer__________________?
C2H2
C2H4
CH4
C2H6
Explanation:
The correct answer to the question is: CH4
Q.
What is the color of copper sulfate crystalline?
Blue
White
Brown
Green
Explanation:
The correct answer to the question is: Blue
Q.
Which of the following statements is incorrect about halogens ?
All the halogens have electronic conviguration ns2p5
All the halogens react with noble gases to form their halides
They have high electron attinity and ionization energy
All are non-metals
Explanation:
The correct answer to the question is: All the halogens react with noble gases to form their halides
Q.
The shielding Effect across the period __________?
Increases
Decreases
None of them
Remains Same
Explanation:
The correct answer to the question is: Remains Same
Q.
The pH of milk is_______?
9
8
12
6.5-7
Explanation:
The correct answer to the question is: 6.5-7
Q.
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
500⁰C
900⁰C
1300⁰C
700⁰C
Explanation:
The correct answer to the question is: 700⁰C
Q.
The number of moles are present in 9.5g of CS2?
None of These
1.5
0.125
0.25
Explanation:
The correct answer to the question is: 0.125
Q.
Which of the following has acidic hydrogen?
Ethene
Ethyne
Ethane
Benzene
Explanation:
The correct answer to the question is: Ethyne
Q.
Which of following is known as Blue Vitriol or Blue Stone?
CuSO4.5H2O
AgNO3
K2Cr2O7
K2CrO4
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
The given dissociation constant (Ka) value 1.3×10-10 is of_________________?
Water
Phenol
Acetic acid
Alcohol
Explanation:
The correct answer to the question is: Phenol
Q.
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
fats and oils
all above
fats and proteins
proteins and oild
Explanation:
The correct answer to the question is: fats and oils
Q.
Which of the following gases is used for welding?
Acetylene
Ethane
Ethene
Methane
Explanation:
The correct answer to the question is: Acetylene
Q.
Tetraethyl lead is used as______?
Mosquito Repellent
Petrol Additive
Fire Extinguisher
Pain Killer
Explanation:
The correct answer to the question is: Petrol Additive
Q.
Oobleck is the mixture of _________?
Gram Flour and Water
Cement and Water
Baking Soda and Vinegar
Cornstarch and Water
Explanation:
The correct answer to the question is: Cornstarch and Water
Q.
Which of the following represents the correct electronic configuration of VII A group elements in the ground state ?
ns2p4
ns2p2
ns2p6
ns2p5
Explanation:
The correct answer to the question is: ns2p5
Q.
The volume strength of 1.5 N H2O2 solution is_______?
8.4
4.8
5.2
8.8
Explanation:
The correct answer to the question is: 8.4
Q.
Aldehyde and ketone have same general formula for homologous series_________________?
CnH2nO2n
CnH2n
CnH2nOn+1
CnH2nO
Explanation:
The correct answer to the question is: CnH2nO
Q.
The anhydride of HCIO4 is_________________?
Cl2O7
Cl2O
ClO2
Cl2O6
Explanation:
The correct answer to the question is: Cl2O7
Q.
Bleaching powder is not used for bleaching________________?
Cotton
Linen
Paper pulb
Costly fabrics
Explanation:
The correct answer to the question is: Costly fabrics
Q.
_____________ surfactants perform well over a wide range water hardness and PH?
Cationic
Anionic
Nonionic
Neutral
Explanation:
The correct answer to the question is: Nonionic
Q.
Which of the following reactions may be assoclated with aldehyde and ketone ?
nucleophile addition
oxidation
all of the above
polymerization
Explanation:
The correct answer to the question is: all of the above
Q.
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?
6P
P/3
3P/T
3P
Explanation:
The correct answer to the question is: P/3
Q.
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
Lime
Sulphonides
Zeolites
Nitrates
Explanation:
The correct answer to the question is: Zeolites
Q.
Metal are highly ___________ ?
Electropositive
Neutral
Electronegativity
Both of these
Explanation:
The correct answer to the question is: Electropositive
Q.
The oxidation of secondary alcohol gives ?
Acetylene
alkane
ketone
carboxylic acid
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following is the most Viscous?
Water
Glycerine
Spirit
Honey
Explanation:
The correct answer to the question is: Honey
Q.
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
PCI5
P2O5
H2SO4
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Carbon,Diamond and Graphite are together called:___________?
Isotopes
Isomers
Isomorphs
Allotrope
Explanation:
The correct answer to the question is: Allotrope
Q.
Position of double bond in an organic compound is determined by ___________?
Reduction
Ozonolysis
Hydrogenation
Oxidation
Explanation:
The correct answer to the question is: Ozonolysis
Q.
Which is used for artificial ripening of fruit ?
methane
ethyne
ethene
ethane
Explanation:
The correct answer to the question is: ethene
Q.
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
Benzene sulphonic acid
N-hexane
acetylene
Sodium benzoate
Explanation:
The correct answer to the question is: N-hexane
Q.
The compound (CH3)3COH according to IUPAC is known as ___________?
Tert Alcohol
1,1- Diethylethanol
2,2-Dimethyl-propanol
Tert-Butanol
Explanation:
The correct answer to the question is: 2,2-Dimethyl-propanol
Q.
Which one of the following is a bridge element?
Cl
Be
K
P
Explanation:
The correct answer to the question is: Be
Q.
The main contributor to toxicity of detergent:
Na-Silicate solution
Na-Chloride solution
K-Chloride solution
Na-sulphate solution
Explanation:
The correct answer to the question is: Na-Silicate solution
Q.
In Periods from Left to right Electronegativity will: _________?
decrease
increase
constant
none of these
Explanation:
The correct answer to the question is: increase
Q.
Formula of Galena is________?
AS2S3
PbS
FeS2
HgS
Explanation:
The correct answer to the question is: PbS
Q.
Glycine is the name of an amino acid because___________________?
Green colour
Shining appearance
Sweet taste
Bitter taste
Explanation:
The correct answer to the question is: Sweet taste
Q.
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
Displacement reaction
Double displacement reaction
Disproportionation reaction
Reduction reaction
Explanation:
The correct answer to the question is: Disproportionation reaction
Q.
Which one of the following statement is correct for urea ?
it is a synthetic fertilizer
it provides micronutrients to the plants
it is a natural fertilizer
it is an inorganic water soluble compound
Explanation:
The correct answer to the question is: it is a synthetic fertilizer
Q.
What is the order of kinetics in the SN1 mechanism ?
First
Second
Zero
Third
Explanation:
The correct answer to the question is: First
Q.
Reacting bromine with benzene in the presence of sunlight will result in_______________?
Substitution reaction
Addition reaction
The rupturing of benzene ring
No-reaction
Explanation:
The correct answer to the question is: Addition reaction
Q.
What is the molecular weight of Ammonia (NH3) ________ ?
17.031 g/mol
19.031 g/mol
27.033 g/mol
18.031 g/mol
Explanation:
The correct answer to the question is: 17.031 g/mol
Q.
Vinylacetylene combines with HCI to form___________________?
benzene
polyacetylene
chloroprene
divinyl acetylene
Explanation:
The correct answer to the question is: chloroprene
Q.
Ethene is the first member of __________?
None of These
Alkenes Family
Saturated hydrocarbon
Aromatic hydrocarbon
Explanation:
The correct answer to the question is: Alkenes Family
Q.
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
hydrolysis
saponification
esterification
neutralization
Explanation:
The correct answer to the question is: esterification
Q.
Percentage of lead in lead pencil is________?
70
80
Zero
20
Explanation:
The correct answer to the question is: Zero
Q.
Indicate the correct statement__________________?
Cl2 is insoluble in water
I2 is a volatile solid
Br2 is more reactive than Cl2
Cl2 is the strongest oxidizing agent
Explanation:
The correct answer to the question is: I2 is a volatile solid
Q.
The most powerful oxidizing agent among the halogens is__________________?
I2
Cl2
Br2
F2
Explanation:
The correct answer to the question is: F2
Q.
Acetal on acid hydrolysis generates__________________?
Alcohol
None of the above
Both A & B
Ketone
Explanation:
The correct answer to the question is: Both A & B
Q.
Air is a/an _________?
Compound
Element
Mixture
Electrolyte
Explanation:
The correct answer to the question is: Mixture
Q.
The valency of Carbon is _________?
1(univalent)
3(Trivalent)
4(Tetravalent)
2(Divalent)
Explanation:
The correct answer to the question is: 4(Tetravalent)
Q.
Ionic solids do not conduct the electrical current because:
The coordination number of ion is very high
Ions don’t have translatory motion
Free electrons are less
Strong covalent bonds are present in their structure
Explanation:
The correct answer to the question is: Ions don’t have translatory motion
Q.
Positron has __________charge.
None of them
-ve
Neutral
+ve
Explanation:
The correct answer to the question is: +ve
Q.
Reactivity due to pi-electrons is present in_________________?
alkane
alkyne
alkene
both B & C
Explanation:
The correct answer to the question is: both B & C
Q.
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
135.5 KJ
159.6kJ
80.4 KJ
110.5 KJ
Explanation:
The correct answer to the question is: 159.6kJ
Q.
When SO2 solution is passed over which of the following it turns green?
H2SO4
K2Cr2O7
SO3
P2O5
Explanation:
The correct answer to the question is: K2Cr2O7
Q.
50% inversion of configuration of molecules take place in a___________________?
E1 – reaction
SN1 – reaction
E2 – reaction
SN2 – reaction
Explanation:
The correct answer to the question is: SN1 – reaction
Q.
What is the molecular formula for Nitric acid ________ ?
HNO2
HNO3
H2NO4
HN2O2
Explanation:
The correct answer to the question is: HNO3
Q.
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)
s-electrons in Mg(Z = 12)
p-electrons in Ne(Z = 10)
Explanation:
The correct answer to the question is: p-electrons in CI(Z = 17)
Q.
Crystals of Na2CO3. 10H2O when exposed to air_________________?
Gain water and become liquid
Remains unchanged
Gain water and remain solid
Lose water and remain solid
Explanation:
The correct answer to the question is: Lose water and remain solid
Q.
Which of the following gases shows more ideal behaviour at 0°C___________?
H2
CH4
He
NH3
Explanation:
The correct answer to the question is: He
Q.
Charle’s Law was given by Jacques Charles in_______?
1787
1885
1785
1880
Explanation:
The correct answer to the question is: 1787
Q.
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
Fe2O3+ 3CO——–> 2Fe+ 3CO2
CaO+ SiO2——> CaSiO3
2FeS+3O2——–> 2Fe+ SO2
FeSiO3———> FeSiO3
Explanation:
The correct answer to the question is: Fe2O3+ 3CO——–> 2Fe+ 3CO2
Q.
Which Oxide of Manganese is amphoteric?
Mn2O3
MnO2
MnO
Mn2O7
Explanation:
The correct answer to the question is: MnO2
Q.
Alum is used by dyers of cloth:
Softening of hard water
As mordant
fire proofing fabrics
As water purifier
Explanation:
The correct answer to the question is: As mordant
Q.
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
Chlorine gas to mix
All of the above
Cathode to decay
Hydroxide ions to reach anode
Explanation:
The correct answer to the question is: Hydroxide ions to reach anode
Q.
Chromatography is used to separate _________ ?
Mixtures
Atoms
Solution
Molecules
Explanation:
The correct answer to the question is: Mixtures
Q.
What will be the PH of 0.01M ammonium chloride solution containing 10 mol per liter of ammonium chloride (pkb=4.76)?
7.24
5.24
6.24
8.24
Explanation:
The correct answer to the question is: 8.24
Q.
Which of the following is not a use of silicon ?
Hydraulic brakes
Lubricants
Water repellent
Antifreeze
Explanation:
The correct answer to the question is: Antifreeze
Q.
The absolute value of charge on electron was determined by ________ ?
J.J.Thomson
Robert Millikan
Rutherford
Chadwick
Explanation:
The correct answer to the question is: Robert Millikan
Q.
Calculate % of N in KNO3__________?
None of these
13.86%
18.56%
14.34%
Explanation:
The correct answer to the question is: 13.86%
Q.
Which of the following compounds will react with Tollens reagent ?
CH3-CHO
CH3-CO-CH2-CH3
CH3-COOH
CH3-CH-CH3
Explanation:
The correct answer to the question is: CH3-CHO
Q.
Tetrahydroborate ion is the source of_______________?
H-
both A & amp; B
H+
proton
Explanation:
The correct answer to the question is: H-
Q.
The molecular formula of Methane gas is___________?
CH
CH
CO
NH
Explanation:
The correct answer to the question is: CH
Q.
The Maximum mass of an atom is present in ___________?
Energy levels
Nucleus
Orbit
Shell
Explanation:
The correct answer to the question is: Nucleus
Q.
The octane number of zero is assigned to____________?
iso-octane
n-heptane
2-methyl octane
3-methyl octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Ethanol and methanol can be distinguished by a__________________?
Tollens test
Iodoform test
Lucas test
Benedicts test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Acidic amino acids have________________?
2 carboxylic groups and 1 amino group
2 amino groups and 1 carboxylic group
1 amino and 1 carboxylic groups
2 amino and 2 carboxylic groups
Explanation:
The correct answer to the question is: 2 carboxylic groups and 1 amino group
Q.
Petra means ______ ?
Fuel
Sediment
Rock
Petrol
Explanation:
The correct answer to the question is: Rock
Q.
Oxidation of primary alcohol gives________________?
Ester
Aldehyde
ketone
Alkene then – COOH
Explanation:
The correct answer to the question is: Aldehyde
Q.
Which one is not a nucleophile ?
C2H5O-
NH3
SCN-
H3C+
Explanation:
The correct answer to the question is: H3C+
Q.
The PH of the 1.3 × 10-4 NH4Cl is__________?
1.3
3.886
2.886
4.0
Explanation:
The correct answer to the question is: 3.886
Q.
Example of cross linked polymer is ____________?
Nylon
PVC
bakelite
Polyester
Explanation:
The correct answer to the question is: bakelite
Q.
The best indicator for titrating HCl with NH4OH is: _________?
litmus
phenol red
phenopthalein
methyl Orange
Explanation:
The correct answer to the question is: methyl Orange
Q.
Oxygen does not react with all except_________________?
Alkali
Water
Acid
Metals
Explanation:
The correct answer to the question is: Metals
Q.
Which of the following is more Basic in nature?
Ammonia
2° Alkyl ammine
1°Alkyl ammine
3° Alkyl ammine
Explanation:
The correct answer to the question is: 3° Alkyl ammine
Q.
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
Xe
CH4
CO2
C2H4
Explanation:
The correct answer to the question is: CO2
Q.
The element of group VIA which is a non-metal is________________?
Po
Te
S
Se
Explanation:
The correct answer to the question is: S
Q.
Which of the following is metasilicic acid ?
H3SbO4
H2SiO3
H2SnO3
H3AsO4
Explanation:
The correct answer to the question is: H2SiO3
Q.
Second ionization potential of alkali metals are very high due to_______________?
being metals
being s-block elements
ns1 electronic configuration
inert gas configurations
Explanation:
The correct answer to the question is: inert gas configurations
Q.
The structure of H2O2 is_______?
Non- polar
Planar
Linear
Spherical
Explanation:
The correct answer to the question is: Non- polar
Q.
Which of the following oxides of iodine is used for quantitative analysis of CO ?
All are equally useful
I2O4
I2O5
I4O2
Explanation:
The correct answer to the question is: I2O5
Q.
Cannizzaros reaction is not given by__________________?
benzaldehyde
trimethyl acetaldehyde
formaldehyde
acetaldehyde
Explanation:
The correct answer to the question is: acetaldehyde
Q.
Which is the strongest acid ?
HCIO2
HCIO4
HCIO
HCIO3
Explanation:
The correct answer to the question is: HCIO4
Q.
In a group, atomic radii increase due to successive increase of _________ ?
Nucleus
Neutron shells
Proton shells
Electronic shells
Explanation:
The correct answer to the question is: Electronic shells
Q.
Which one exhibits aldol condensation____________________?
C6H5CHO
CH3COCH3
HCHO
Cl3CCHO
Explanation:
The correct answer to the question is: CH3COCH3
Q.
The number of ions produced by [Pt(NH3)]Cl2?
2
5
4
3
Explanation:
The correct answer to the question is: 3
Q.
Which electronic configuration corresponds to an element of group IIIA ?
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p4
1s2 2s2 2p3
1s2 2s2 2p6 3s2 3p6 4s2 3d1
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p1
Q.
The organic acid that can be made from ethanol is_________________?
Butanoic acid
Acetic acid
Citric acid
Formic acid
Explanation:
The correct answer to the question is: Acetic acid
Q.
Atomic mass of an atom is present in the __________?
Shell
Orbit
Orbital
Nucleus
Explanation:
The correct answer to the question is: Nucleus
Q.
Evaporation is_____________?
Continuous Process
Endothermic Reaction
Surface Process
All of these.
Explanation:
The correct answer to the question is: All of these.
Q.
Ketones and aldehydes can be distinguished using ____________?
Tollens reagent
None of These
Bendict solution
Fehling solution
Explanation:
The correct answer to the question is: Tollens reagent
Q.
What is the chemical name of Oil of Vitriol?
Muriatic Acid
Nitric Acid
Sulphuric Acid
Hydrochloric Acid
Explanation:
The correct answer to the question is: Sulphuric Acid
Q.
Ostwald’s dilution law applicable to:
Strong electrolytes
All electrolytes
Weak electrolytes
Non electrolytes
Explanation:
The correct answer to the question is: Weak electrolytes
Q.
The PH of pure water at 25°C, kw=1×10-4____________?
7
None of above
14
Explanation:
The correct answer to the question is: 7
Q.
The Substance which resist in change in PH is called?
Active transport
Osmosis
Neutralization
Buffer
Explanation:
The correct answer to the question is: Buffer
Q.
In borax bead test which compound is formed_________?
Meta borate
Ortho burate
Double oxide
Tetra borate
Explanation:
The correct answer to the question is: Meta borate
Q.
Molecular orbital Theory is also called_________?
Bonding theory
Band theory
Antibondingtheory
π and σ bonding theory
Explanation:
The correct answer to the question is: Antibondingtheory
Q.
In which compound of Xenon the oxidation state of Xenon is + 6?
XeF4
XeOF4
Na4XeO6
XeOF2
Explanation:
The correct answer to the question is: XeOF4
Q.
The discovery of neutron became very late because _______ ?
It does not carry any charge
It is present in nucleus
It is a fundamental particle
It does not move
Explanation:
The correct answer to the question is: It does not carry any charge
Q.
Which of the following phenomenon is considered responsible for Global Warming?
Fire in coal mines
Greenhouse effect
Dry farming
Monsoon
Explanation:
The correct answer to the question is: Greenhouse effect
Q.
Stainless steel contains___________?
Fe+ Cr+Cu
Fe+Cr+Ni
Cu+C+Ni
Fe+Ni+Cu
Explanation:
The correct answer to the question is: Fe+Cr+Ni
Q.
The heaviest subatomic particle among the following is_________?
Neutron
Proton
All have mass
Electron
Explanation:
The correct answer to the question is: Neutron
Q.
The whole universe is made up of almost _______of Hydrogen?
60%
80%
70%
50%
Explanation:
The correct answer to the question is: 70%
Q.
Ethyl chloride with nascent hydrogen produces_________________?
butane
ethane
methane
propane
Explanation:
The correct answer to the question is: ethane
Q.
Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?
Carbon Monoxide Gas
None of them
Hydrogen Gas
Both at same time
Explanation:
The correct answer to the question is: None of them
Q.
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Einstein
Dr.A.Walash
S.E.Manhan
Schwartz
Explanation:
The correct answer to the question is: Schwartz
Q.
When Ammonia is used as a refrigerant in vapour compression cycle?
Cu Tubing used
Steel tubes used
Material does not effect by refrigerant
Both a & b
Explanation:
The correct answer to the question is: Steel tubes used
Q.
The compound C3H4 has a triple bond, which is indicated by its reaction with____________?
Fehling solution
Ammonical silver nitrate
Bromine water
Bayer’s reagent
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
Law of mass action was proposed by Goldberg and Peter Waage in _________?
None of These
1888
1866
1864
Explanation:
The correct answer to the question is: 1864
Q.
Quality of petrol is measured by___________?
Refining
Heptane number
Reforming
octane number
Explanation:
The correct answer to the question is: octane number
Q.
Greater the heat of neutralization the acid will be____________?
None of the above
More weaker
Not related to acid strength
more stronger
Explanation:
The correct answer to the question is: more stronger
Q.
The mass of 3.2 moles of ammonia (NH3) gas?
54.4 grams
56.4 grams
53.4 grams
55.4 grams
Explanation:
The correct answer to the question is: 54.4 grams
Q.
I3( Tri-iodine) has shape_________?
Linear
Trigonal bipyramidal
Both A and C
Square bipyramidal
Explanation:
The correct answer to the question is: Linear
Q.
Which one of the following alcohol has greater boiling point___________________?
methanol
glycerol
ethanol
ethylene glaycol
Explanation:
The correct answer to the question is: glycerol
Q.
The preparation of benzene from acetylene can also be said as_________________?
Dehydration
Condensation
Polymerization
Oxidation
Explanation:
The correct answer to the question is: Polymerization
Q.
A elements are named as alkali metals because_______________?
Their oxides are basic
Both A & B
Their oxide and hydroxides are water soluble
They are found in earth
Explanation:
The correct answer to the question is: Both A & B
Q.
The reciprocal of the coefficent of viscosity is called__________?
Fluidity
Specific gravity
Density
Absorbance
Explanation:
The correct answer to the question is: Fluidity
Q.
Carbon in wrought iron is present as_________?
Partly as iron carbide and partly as graphite
Iron carbide
Graphite
Silicon carbide
Explanation:
The correct answer to the question is: Iron carbide
Q.
Which alkyl halide has the highest reactivity for a particular alkyl group ?
R-F
R-Br
R-C
R-I
Explanation:
The correct answer to the question is: R-I
Q.
Identify among the following which has Lowest energy of electron in 1st shell.
Be+³
Li+²
He+¹
H
Explanation:
The correct answer to the question is: Be+³
Q.
The reaction of Lucas reagent is the fastest with_________?
CH3CH2OH
(CH3)3COH
(CH3)2CHOH
CH3(CH2)OH
Explanation:
The correct answer to the question is: (CH3)3COH
Q.
The process by which a substance absorbs moisture upon exposure to atmosphere is called?
Efflorescence
Desalination
Dehydrogenation
Deliquescence
Explanation:
The correct answer to the question is: Deliquescence
Q.
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
C3H6
C2H4
C5H10
C4H8
Explanation:
The correct answer to the question is: C4H8
Q.
Z number for chlorine is __________?
17
35.5
21
Explanation:
The correct answer to the question is: 17
Q.
Hydrocarbon is formed when Grignard reagent is treated with___________?
Both a and b
CH3OH
None of the above
H2O
Explanation:
The correct answer to the question is: H2O
Q.
Substance which is found in dried up lakes of Tibet and California is_______________?
Colemanite
Boric acid
Tincal
Calcium carbonate
Explanation:
The correct answer to the question is: Tincal
Q.
Electronic Configuration of Calcium (Ca) atom may be written as________?
Kr,4p2
Ne, 4s2
Ne, 4p2
Ar, 4s2
Explanation:
The correct answer to the question is: Ar, 4s2
Q.
Which of the following will decompose to produce litharge_________________?
Pb3O4
All of the above
Pb2O
PbO2
Explanation:
The correct answer to the question is: Pb3O4
Q.
The phenomenon of negative catalysis is also known as:
Self catalysis
Enzyme catalysis
inhibition
auto catalysis
Explanation:
The correct answer to the question is: inhibition
Q.
Which of the following is not a use of formaldehyde ?
in making acetic acid
in making throat lozenges
in silvery mirror
in making medicine urotropine
Explanation:
The correct answer to the question is: in making acetic acid
Q.
Upto ___________________ C atoms alkanes are gases?
4
3
6
2
Explanation:
The correct answer to the question is: 4
Q.
When the radiation of light is passed through a prism, it undergoes __________?
reflection
interference
refraction
diffraction
Explanation:
The correct answer to the question is: refraction
Q.
What is the mass percent of silver in silver notrate, AgNO3?
63.5%
61.5%
65.6%
64.5%
Explanation:
The correct answer to the question is: 63.5%
Q.
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
SO
CH
CH
SO
Explanation:
The correct answer to the question is: SO
Q.
Nucleus of an atom was discovered by___________?
Goldstein
J J Thomson
James Chadwick
Rutherford
Explanation:
The correct answer to the question is: Rutherford
Q.
Urea as a fertilizer contains:____________?
57% N
46% N
73% N
53% N
Explanation:
The correct answer to the question is: 46% N
Q.
Introduction of nitro group in a molecule is called___________________?
halogenation
sulphonation
amination
nitration
Explanation:
The correct answer to the question is: nitration
Q.
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
Column chromatography
Gas chromatography
Extraction
Distillation
Explanation:
The correct answer to the question is: Column chromatography
Q.
Which metal is used as a reducing agent in Smelting______?
Cu
Zn
Al
C
Explanation:
The correct answer to the question is: C
Q.
The molar mass of an organic acids is determined by____________?
Osmosis method
Depression of freezing point
Victor Meyer’s method
Volumetric method
Explanation:
The correct answer to the question is: Volumetric method
Q.
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
they have a nucleophilic carbon & a good leaving group
they have an electrophilic carbon
they have an electrophilic carbon & a good leaving group
they have an electrophilic carbon & a bad leaving group
Explanation:
The correct answer to the question is: they have an electrophilic carbon & a good leaving group
Q.
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
81%
75%
89%
73%
Explanation:
The correct answer to the question is: 73%
Q.
Methyl alcohol on oxidation with acidified K2Cr2O7 gives__________?
CH3CHO
CH3COOH
CH3COCH3
HCOOH
Explanation:
The correct answer to the question is: HCOOH
Q.
Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C.
27%
<2.6%
37%
26%
Explanation:
The correct answer to the question is: 37%
Q.
Tincal is a mineral of___________________?
A1
Si
C
B
Explanation:
The correct answer to the question is: B
Q.
Which ion will have maximum value of heat of hydration ?
Mg+2
A1+3
Ba+
Cs+
Explanation:
The correct answer to the question is: A1+3
Q.
Which is artificial manmade fiber?
Boron
None of these
Rayon
Saffron
Explanation:
The correct answer to the question is: Rayon
Q.
Acetylene gives:
White precipitate with both the reagents
Red precipitate with both the reagents
White precipitate with AgNO and red precipitate with CuCl
White precipitate with CuCl and red precipitate with AgNO
Explanation:
The correct answer to the question is: White precipitate with AgNO and red precipitate with CuCl
Q.
Alkanes are also known as________________?
paraffins
saturated hydrocarbon
unsaturated hydrocarbon
both A & C
Explanation:
The correct answer to the question is: paraffins
Q.
Which element is necessary for normal leaf development ?
Mg
Ba
Si
Ca
Explanation:
The correct answer to the question is: Ca
Q.
Isotopes differs in______________________?
properties depend upon mass
arrangement of electrons in orbitals
chemical properties
position in the periodic table
Explanation:
The correct answer to the question is: properties depend upon mass
Q.
Poisonous gas present in the exhaust fumes of a jet plane is__________?
Flurocarbon
Methane
C2H2
Carbon monoxide
Explanation:
The correct answer to the question is: Carbon monoxide
Q.
Example of ‘globular’ proteins is __________ ?
Enzymes
Peptide
Secondary proteins
Primary protein
Explanation:
The correct answer to the question is: Enzymes
Q.
The heat energy produced when the human body metabolises 1 gram of fat is__________?
29 KJ
39 KJ
1 KJ
30 KJ
Explanation:
The correct answer to the question is: 39 KJ
Q.
The chemical symbol for silver is __________?
Ag
At
Au
Sv
Explanation:
The correct answer to the question is: Ag
Q.
The process in which no heat enters or leave the system known as _____________?
Isobaric
Isochoric
Isothermal
adiabatic
Explanation:
The correct answer to the question is: adiabatic
Q.
Hookworm is a parasitic worm that infects ______?
liver
lungs
small intestine
large intestine
Explanation:
The correct answer to the question is: small intestine
Q.
In isothermal process?
Pressure of the system remains constant
No heat enter or leave the system
Volume of the system remains unchanged
temperature of the system remains constant
Explanation:
The correct answer to the question is: temperature of the system remains constant
Q.
Electric bulb filament is made of__________?
Tungsten
Copper
Lead
Aluminum
Explanation:
The correct answer to the question is: Tungsten
Q.
Argon gas was discovered by_______?
Ramsay
Lockerey
Dalton
Rayleigh
Explanation:
The correct answer to the question is: Ramsay
Q.
Which statement is incorrect ?
All the metals are good conductor of electricity
All the metals form positive ions
All the metals form acidic oxides
All the metals are good conductor of heat
Explanation:
The correct answer to the question is: All the metals form acidic oxides
Q.
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
methanol
carbonic acid
methanol
methane
Explanation:
The correct answer to the question is: methanol
Q.
Ozonolysis of acetylene gives:
Glyoxal then formic acid
Formaldehyde
None
Glycol
Explanation:
The correct answer to the question is: Glyoxal then formic acid
Q.
Ethylene diammine is ligand________?
mono dentate
Bi dentate
Poly dentate
tri dentate
Explanation:
The correct answer to the question is: Bi dentate
Q.
The PH of Tears is __________?
7.4
8.2
7.0
7.8
Explanation:
The correct answer to the question is: 7.4
Q.
The substance used in cancer therapy is___________?
Fe
Co
Ni
Rn
Explanation:
The correct answer to the question is: Co
Q.
Boric acid cannot be used__________________?
For washing eyes
As antiseptic in medicine
In soda bottles
For enamel and glazes
Explanation:
The correct answer to the question is: In soda bottles
Q.
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Glyoxime
Glycol
Benzaldehyde
Glyoxal
Explanation:
The correct answer to the question is: Glyoxal
Q.
Strong Nucleophile in polar aprotic solvent?
Iodide ion
Chloride ion
Bromide ion
Flouride ion
Explanation:
The correct answer to the question is: Flouride ion
Q.
The salt that gives the aqueous solution with pH less than 7, is called as____________?
Acidic salt
Neutral salt
Amphoteric salt
Basic salt
Explanation:
The correct answer to the question is: Acidic salt
Q.
Which one of the following is also known as tartaric acid ?
2 3-dihydroxy butance 1 4 -dioic acid
2 3 -dihydroxy butanedioic acid
2 2 -dihydroxy butanoic acid
2 3 -dihydroxy butanioc acid
Explanation:
The correct answer to the question is: 2 3-dihydroxy butance 1 4 -dioic acid
Q.
The law of traids is applicable to__________?
Cl, Br, I
Li, Be, B
Na, K, Rb
F, Cl, Br
Explanation:
The correct answer to the question is: Cl, Br, I
Q.
Actinides are the elements with atomic numbers from __________?
101 to 115
97 to 104
36 to 43
89 to 103
Explanation:
The correct answer to the question is: 89 to 103
Q.
Marsh gas is _________?
Nitrogen
Ethane
Methane
Hydrogen
Explanation:
The correct answer to the question is: Methane
Q.
Transition elements, in general, exhibit the following properties, except one. Name that property?
Variable oxidation state
Formation of alloys
Natural Radioactivity
Tendency to form complexes
Explanation:
The correct answer to the question is: Natural Radioactivity
Q.
Which one of the followings possesses melting point below 0°C?
Carbon
Phosphorus
Nitrogen
Bismuth
Explanation:
The correct answer to the question is: Nitrogen
Q.
Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
electronphilic addition
electrophilic substitution
nucleophilic substitution
nucleophilic addition
Explanation:
The correct answer to the question is: nucleophilic addition
Q.
An alcohol produced during the formation of a soap process.
Butanol
Glycerol
Ethanol
Ethylene glycol
Explanation:
The correct answer to the question is: Glycerol
Q.
The quantity of petrol can be increased by ___________?
Reforming
Refining
Cracking
Induction fueling
Explanation:
The correct answer to the question is: Cracking
Q.
The oxidation of isopropyl alcohol will yield___________________?
Propanone
Propanol
propane
Propanoic acid
Explanation:
The correct answer to the question is: Propanone
Q.
Which of the following is not an amino acids_____________________?
aspartic acids
glycine
lactic acid
glumatic acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
PbCl2
Cu2Cl2
CuCl2
PdCl2
Explanation:
The correct answer to the question is: CuCl2
Q.
Species are formed in one step of reaction mechanism and used up in another step are called:
Intermediate
Catalyst
inhibitor
activated complex
Explanation:
The correct answer to the question is: Intermediate
Q.
The composition of ‘ Golden spangles is_________?
PbI2
PbCrO4
BaCrO4
As2Cr2O7
Explanation:
The correct answer to the question is: PbCrO4
Q.
Which one of the following radiation has the longer wavelength?
x-ray
visible
infra red
ultra violet
Explanation:
The correct answer to the question is: infra red
Q.
Barret esophagus is good example of__________?
Metaplasia
Atrophy
Hypertrophy
Dysplasia
Explanation:
The correct answer to the question is: Metaplasia
Q.
Which one is least ionic in nature and decompose on heating ?
CsOH
LiOH
NaOH
KOH
Explanation:
The correct answer to the question is: LiOH
Q.
The molecular formula of Glucose is____________?
NH
CHO
CHO
CH
Explanation:
The correct answer to the question is: CHO
Q.
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
Angle strain
Steric strain
Torsional strain
Orbital strain
Explanation:
The correct answer to the question is: Steric strain
Q.
diamond got brilliance due to following reason?
refraction
dispersion
all of the above
reflection
Explanation:
The correct answer to the question is: all of the above
Q.
The process in which solid changes directly into vapours without passing through liquid state?
Decantation
Evaporation
Sublimation
None
Explanation:
The correct answer to the question is: Sublimation
Q.
Surface water contains:_____________?
Organic matter
only salt
Salt & Organic matter
Suspended impurity
Explanation:
The correct answer to the question is: Salt & Organic matter
Q.
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
Molasses
Filterate
Extract
Mother liquor
Explanation:
The correct answer to the question is: Molasses
Q.
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
Cone. HCI and anhydrous SOCl2
Cone. HCI and anhydrous ZnCl2
Cone. HCI and anhydrous PCl2
Cone. HCI and anhydrous CaCl2
Explanation:
The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Q.
The by-product of the process of Saponification is___________?
Glycerol
Glycol
Sodium hydroxide
Methanol
Explanation:
The correct answer to the question is: Glycerol
Q.
What is the color of precipitates of AgI?
Brown
Yellow
Blue
Light Yellow
Explanation:
The correct answer to the question is: Yellow
Q.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
0.2 moles
0.5 moles
0.4 moles
0.3 moles
Explanation:
The correct answer to the question is: 0.2 moles
Q.
Aldehydes and ketones both, show the type of Isomerism is __________?
Position Isomerism
chain Isomerism
Metamerism
Functional Group Isomerism
Explanation:
The correct answer to the question is: Functional Group Isomerism
Q.
Cations possess __________ charge?
-ve
+ve
None
Neutral
Explanation:
The correct answer to the question is: +ve
Q.
By which method the molecular mass of benzene was determined as 78.108 ?
Specific gravity method
Vapour density method
Distillation methos
X-ray diffraction method
Explanation:
The correct answer to the question is: Vapour density method
Q.
CO2 is gas while SiO2 is solid at room temperature?
CO2 forms multiple bond while silicon does not form multiple bonds
carbon is non-metal while silicon is semi-metal
CO2 is an independent molecule while SiO2 has network covalent structure
Silicon has all sigma bonds
Explanation:
The correct answer to the question is: CO2 is an independent molecule while SiO2 has network covalent structure
Q.
NaOH is named as caustic soda because________________?
It is used in soda water
It corrodes the organic tissues
It reacts with fats to form soap
It reacts with chlorine gas
Explanation:
The correct answer to the question is: It corrodes the organic tissues
Q.
The rectified spirit contains________________?
100% alcohol
90% alcohol
95% alcohol
12% alcohol
Explanation:
The correct answer to the question is: 95% alcohol
Q.
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
Two
Six
Four
Three
Explanation:
The correct answer to the question is: Three
Q.
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
Uranium dating
Deuterium dating
Carbon dating
Radium dating
Explanation:
The correct answer to the question is: Carbon dating
Q.
Which of the following is the Radioactive isotope of Hydrogen?
Tritium
Deuterium
Nichromium
Protium
Explanation:
The correct answer to the question is: Tritium
Q.
The radiations with negative charge are________.
positron
Alpha radiations
Beta radiations
Gamma radiations
Explanation:
The correct answer to the question is: Beta radiations
Q.
Bleaching powder is an example of________________?
Mixed salt
Double salt
Normal salt
Complex
Explanation:
The correct answer to the question is: Mixed salt
Q.
What is the color of precipitates of AgBr?
Light green
Light Blue
Light brown
Light yellow
Explanation:
The correct answer to the question is: Light yellow
Q.
P2O5 is a hygroscopic powder which sublimes at______________?
630°C
620°C
260°C
360°C
Explanation:
The correct answer to the question is: 360°C
Q.
The IUPAC name of ethylene oxide is__________?
Methoxymethane
Oxoethene
Oxirane
Epoxy methane
Explanation:
The correct answer to the question is: Oxoethene
Q.
The concept of telluric helix was developed by___________?
Dobereiner
Lother Meyer
A.E de Chancourtois
Newland
Explanation:
The correct answer to the question is: A.E de Chancourtois
Q.
The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:
45g
41.4g
43.6g
40g
Explanation:
The correct answer to the question is: 43.6g
Q.
What catalyst is employed when benzene is prepared from acetylene at 70°C?
Ni 250 – 300°C
Organo-nickel
Cr2O3 + A2O3 + SiO2
Raney nickel
Explanation:
The correct answer to the question is: Organo-nickel
Q.
Milk tastes sour when kept in the open for sometime due to the formation of __________?
acetic acid
lactic acid
citric acid
carbonic acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Alpha particles can be detected by using___________?
Gold foils
Thin Aluminium sheet
Barium sulphate
Zinc sulphide screen
Explanation:
The correct answer to the question is: Zinc sulphide screen
Q.
The equation that represents the relationship of Faraday’s first law of electrolysis is _______?
w=Z/At
Z= At/M
Z=At
w=ZAt
Explanation:
The correct answer to the question is: w=ZAt
Q.
The subatomic particle that has negative charge is___________?
None of These
Proton
Electron
Neutron
Explanation:
The correct answer to the question is: Electron
Q.
The reaction of C2H5OH with conc. H2SO4 does not give_________?
Acetylene
Ethene
Ethyl hydrogen sulphate
Diethyl ether
Explanation:
The correct answer to the question is: Acetylene
Q.
Following are the anions of soap which form Ca and Mg ions which we see as curd in water
Sodium hexadecanoate
Both A & B
Sodium octadecanoate
Sodium pentadecanoate
Explanation:
The correct answer to the question is: Both A & B
Q.
The PH of the 0.0032 M H2SO4 is__________?
4.0
2.198
3.2
1.0
Explanation:
The correct answer to the question is: 3.2
Q.
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
e
3e
4e
2e
Explanation:
The correct answer to the question is: 2e
Q.
Polyamides are synthetic polymers commonly known as___________?
Nylon
Protein
synthetic
Cellulose
Explanation:
The correct answer to the question is: Nylon
Q.
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
Three
Five
Two
Four
Explanation:
The correct answer to the question is: Three
Q.
The distribution coefficient is related to:______________?
retardation factors
decreasing factors
Separating factors
Colouring factors
Explanation:
The correct answer to the question is: Separating factors
Q.
In Aldehydes and Ketones, carbon of carbonyl group is ____________?
sp hybridised
Unhybridised
sp hybridised
sp hybridised
Explanation:
The correct answer to the question is: sp hybridised
Q.
Formula of Chile saltpetre is__________________?
NH4Cl
NaNO3
Ba (NO3)2
CaCO3
Explanation:
The correct answer to the question is: NaNO3
Q.
Which of the following is the most reactive_________________?
benzene
ethane
ethene
ethyne
Explanation:
The correct answer to the question is: ethene
Q.
Where does the oxygen that keeps us alive come from?
Carbonates absorbed from soil
Carbon dioxide
Oxides of minerals
Water
Explanation:
The correct answer to the question is: Water
Q.
Which is the paramagnetic oxide of chlorine ?
Cl2O6
ClO2
all
Cl2O7
Explanation:
The correct answer to the question is: ClO2
Q.
Grignard reagent is reactive due to___________________?
the polarity of C-Mg bond
the presence of magnesium atom
all
the presence of halogen atom
Explanation:
The correct answer to the question is: the polarity of C-Mg bond
Q.
Real gases show ideal behavior at_______?
High Temp & Low Pressure
Low Temp & High Pressure
Low Temp & Low Pressure
High Temp & High pressure
Explanation:
The correct answer to the question is: High Temp & Low Pressure
Q.
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
6.5gm
0.065gm
7.5gm
0.65gm
Explanation:
The correct answer to the question is: 7.5gm
Q.
Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
formalactose
lactomint
aldomint
formamint
Explanation:
The correct answer to the question is: formamint
Q.
Solvent used in separation of biomolecules is _______________?
Trichloroacetic acid
Ether
Alcohol
Acetone
Explanation:
The correct answer to the question is: Trichloroacetic acid
Q.
The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
Laughing Gas
CO+H²(water gas)
CO³+H²O
CO²+O²
Explanation:
The correct answer to the question is: CO+H²(water gas)
Q.
Lactic acid on oxidation by alkaline potassium permanganate gives:____________?
Pyruvic acid
Cinnamic acid
Tartaric acid
Propionic acid
Explanation:
The correct answer to the question is: Pyruvic acid
Q.
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
n-propyl benzene
Ethyl benzene
Toluene
All
Explanation:
The correct answer to the question is: All
Q.
Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?
CH3COOH
K2MnO4
AgNO3
CuSO4
Explanation:
The correct answer to the question is: AgNO3
Q.
The rate of formation of ozone depends on the flux of:
Gamma rays
Infrared radiation
visible radiation
Ultra violet radiation
Explanation:
The correct answer to the question is: Ultra violet radiation
Q.
In water, Hydrogen is present ________by mass.
15.15%
31.13%
11.11%
22%
Explanation:
The correct answer to the question is: 11.11%
Q.
Polyvinyl acetate is the Polymer of __________?
Formaldehyde
Vinyl Chloride
Vinyl acetate
Methyl methacrylate
Explanation:
The correct answer to the question is: Vinyl acetate
Q.
Formaldehyde on condensation in the presence of calcium hydroxide: ______________?
Xylose
Fructose
Formose
Maltose
Explanation:
The correct answer to the question is: Formose
Q.
Amino acids are a product of the digestion of: ___________?
Proteins
Fats
Vitamins
Carbohydrates
Explanation:
The correct answer to the question is: Proteins
Q.
O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
Ethyl alcohol
Ethylene glycol
HCHO
Ethylene oxide
Explanation:
The correct answer to the question is: HCHO
Q.
In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
two
three
one
four
Explanation:
The correct answer to the question is: one
Q.
Which instrument is used to measure the viscosity.?
Anemometer
Hydrometer
Viscometer
Hygrometer
Explanation:
The correct answer to the question is: Viscometer
Q.
For which mechanisms the first step involved is the same ?
SN1 and SN2
E1 and SN1
E1 + E2
E2 + SN2
Explanation:
The correct answer to the question is: E1 and SN1
Q.
In whole Periodic Table which element Is Most Reducing Agent ?
Helium
Chlorine
Neon
lithium
Explanation:
The correct answer to the question is: lithium
Q.
An alcohol which can be prepared by fermentation is_________________?
CH3OH
C3H7OH
C6H5OH
CH3 – CH2 – OH
Explanation:
The correct answer to the question is: CH3 – CH2 – OH
Q.
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
black
pink
yellow
brick red
Explanation:
The correct answer to the question is: brick red
Q.
Which of the following statements is false about transition metals?
They form complexes
All transition metal compounds are paramagnetic
They form coloured ions
They show variable valency
Explanation:
The correct answer to the question is: All transition metal compounds are paramagnetic
Q.
Which one of following amino acid is neither acidic nor a basic in nature ?
Glutamic acid
Histidine
Lysine
Proline
Explanation:
The correct answer to the question is: Proline
Q.
Which of the following will have the highest boiling point ?
hexanone
propanal
ethanal
methanol
Explanation:
The correct answer to the question is: hexanone
Q.
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
3.05 gram
5.05 gram
2.05 gram
4.05 gram
Explanation:
The correct answer to the question is: 3.05 gram
Q.
Which one of the following is most acidic?
Phenol
O-nitrophenol
P-nitrophenol
M-nitrophenol
Explanation:
The correct answer to the question is: P-nitrophenol
Q.
The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
1-4Kg
1-2Kg
1-3Kg
1-5Kg
Explanation:
The correct answer to the question is: 1-2Kg
Q.
The average salinity of sea water is________?
2%
2.5%
3.5%
3%
Explanation:
The correct answer to the question is: 3.5%
Q.
Which element can form tripositive ion ?
Beryllium
Aluminium
Silicon
Carbon
Explanation:
The correct answer to the question is: Aluminium
Q.
The element used for the formation of alloys is__________?
Iron
Mercury
Chromium
Calcium
Explanation:
The correct answer to the question is: Chromium
Q.
Which one of the following halogens is present in Teflon________________?
F2
Cl2
I2
Br2
Explanation:
The correct answer to the question is: F2
Q.
Dimethyl ketones are usually characterized through_____________?
Schiff’s test
Benedict’s reagent
Tollen’s reagent
Iodoform test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Which molecule have stronger London dispersion forces?
Bromine
Hydrochloric acid
Water
Hydrogen gas
Explanation:
The correct answer to the question is: Water
Q.
The IUPAC name of pyridines is__________?
Azolo
Diazine
Azolidins
Azine
Explanation:
The correct answer to the question is: Azine
Q.
The organic compound used as antiknock agent in petroleum is____________?
(CH )Pb
CH )Hg
CH MgBr
TNT
Explanation:
The correct answer to the question is: (CH )Pb
Q.
Identify among the following which is not the unsaturated hydrocarbon.
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Which one of the following is the correct sequence according to atomic weights?
Fe>Co> Ni
Co >Fe>Ni
Ni> Co> Fe
Co > Ni > Fe
Explanation:
The correct answer to the question is: Co > Ni > Fe
Q.
The Chemical Formula of Sand is___________?
Al2O3
Sr2O
Si2O3
SiO2
Explanation:
The correct answer to the question is: SiO2
Q.
Generally the limit of visible spectrum is__________?
3800 to 7600 A°
1000 to 300 A°
12,000 to 15,000 A°
8000 to 10,000 A°
Explanation:
The correct answer to the question is: 3800 to 7600 A°
Q.
Which gas is used for artificial ripening of green fruit ?
Ethane
Carbon dioxide
Acetylene
Ethylene
Explanation:
The correct answer to the question is: Ethylene
Q.
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
Nylon 66
Aniline formaldehyde plastic
Bakelite
urotropine
Explanation:
The correct answer to the question is: Bakelite
Q.
Which of the following can be separated by ” Sublimation Method”?
Sand and Iron Filing
Sand and Naphthalene
None
Both A & B
Explanation:
The correct answer to the question is: Sand and Naphthalene
Q.
The rate of E1 reaction depends upon______________________?
base the concentration of substrate as well as nucleophile
the concentration of substrate as well as nucleophile
the concentration of substrate
the concentration of nucleophile
Explanation:
The correct answer to the question is: the concentration of substrate
Q.
The maximum mass is present in 1dm3 for the following gas at STP.
CO
CH
CO
CS
Explanation:
The correct answer to the question is: CS
Q.
A gas was found to have a density of 0.0847g/L at 17°C and a pressure of 760 torr. The gas must be?
CH4
N2
None of These
He
Explanation:
The correct answer to the question is: He
Q.
Acetophenone is a_____________________?
Ketone
Ester
Ether
Aldehyde
Explanation:
The correct answer to the question is: Ketone
Q.
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p6 4s23d5
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p5 3d10
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p6 4s23d5
Q.
All members of homologous series have different __________?
chemical properties
functional group
all of them
physical properties
Explanation:
The correct answer to the question is: physical properties
Q.
Heating phenol with Zn will yield_________________?
Benzene
Cyclohexane
Benzoic acid
Phenoxide
Explanation:
The correct answer to the question is: Benzene
Q.
Numbers of subatomic particles?
3
1
2
more than 3
Explanation:
The correct answer to the question is: more than 3
Q.
The most commonly used bleaching agent is_________?
alcohol
sodium chlorine
carbon dioxide
chlorine
Explanation:
The correct answer to the question is: chlorine
Q.
The easy way of balancing the chemical equation is_________?
According to atom’s atomic mass.
None of the above
First we balance Metal than non-metal than Hydrogen than Oxygen.
according to atom’s atomic number.
Explanation:
The correct answer to the question is: First we balance Metal than non-metal than Hydrogen than Oxygen.
Q.
Hyperconjugation is also known as ____________?
Electromeric effect
no bond reasonable
Inductive effect
Reasonable
Explanation:
The correct answer to the question is: no bond reasonable
Q.
The one mole of _____molecule has the highest number of atoms?
HSO
HClO
O
HCO
Explanation:
The correct answer to the question is: HCO
Q.
On oxidation, an alcohol gives an aldehyde having same number of carbon atoms as in alcohol, the alcohol is____
Primary Alcohol
Tertiary alcohol
None of These
Secondary Alcohol
Explanation:
The correct answer to the question is: Primary Alcohol
Q.
Incomplete oxidation of methane in the limited supply of air forms ?
CO + H2O + C
CO2 and H2O
CH3OH
CO + H2 + C
Explanation:
The correct answer to the question is: CH3OH
Q.
The only non metal exists in liquid state is ___________?
Mercury
Phosphorus
Bromine
Iodine
Explanation:
The correct answer to the question is: Bromine
Q.
A brivalent metal has the equivalent weighr of 12. The molecular weight to its oxide will be_______?
24
32
36
40
Explanation:
The correct answer to the question is: 40
Q.
An acid with unpleasant smell_________________?
formic acid
propionic acid
butyric acid
acetic acid
Explanation:
The correct answer to the question is: butyric acid
Q.
The system which can exchange matter as well as energy with its surroundings is called____________?
open system
Inert system
Isolated system
Closed system
Explanation:
The correct answer to the question is: open system
Q.
Formalin is ___________ solution of formaldehyde in water?
20%
40%
10%
60%
Explanation:
The correct answer to the question is: 40%
Q.
The element cesium bears resemblance with________________?
Cr
Both of the above
None of the above
Ca
Explanation:
The correct answer to the question is: None of the above
Q.
Li is different from its family members due to____________________?
all of the above
less electropositivity
high charge density
small size
Explanation:
The correct answer to the question is: all of the above
Q.
Carbonates of lithium are not stable like that of sodium due to________________?
Not known yet
Low electronegativity
Low electropositivity
Low charge density
Explanation:
The correct answer to the question is: Low electropositivity
Q.
Alkyl halides undergo a type of reaction_________________?
Elimination
Nucleophilic addition
Nucleophilic substitution
both A & C
Explanation:
The correct answer to the question is: both A & C
Q.
If temperature of gallium arsenide is increased then its conductivity will___________________?
first decreases then increases
remains constant
decrease
increase
Explanation:
The correct answer to the question is: increase
Q.
Order of ease of halogenation in alkane is________________?
F2>Cl2>I2>Br2
Cl2>F2>Br2>I2
F2>Cl2>Br2>I2
I2>Cl2>Br2>F2
Explanation:
The correct answer to the question is: F2>Cl2>Br2>I2
Q.
Alcohols of lower Molecular weight are _______________?
Insoluble in water
More Soluble in water
Insoluble in all solvents
Soluble in water on heating
Explanation:
The correct answer to the question is: More Soluble in water
Q.
General formula of alkyne is______________?
CnH2n + 2
CnH2n – 2
CnH2n + 2
CnH2n
Explanation:
The correct answer to the question is: CnH2n – 2
Q.
Which of the following is non spontaneous cell?
Electrolytic cell
Daniel cell
Not
Galvanic cell
Explanation:
The correct answer to the question is: Electrolytic cell
Q.
The bond angle between hybrid orbitals in methane CH3 is___________?
115.5°
105. 7°
180°
109.5°
Explanation:
The correct answer to the question is: 109.5°
Q.
Phosphorus is a Greek word and it means_________________?
Impure
Fire
Light bearing
Tetrahedral
Explanation:
The correct answer to the question is: Light bearing
Q.
Alkaline PH scale starts from?
0 to 14
7 to 11
6 to 10
8 to 14
Explanation:
The correct answer to the question is: 8 to 14
Q.
The word Alkali means__________________?
Spirit
Base
Ashes
Basic salt
Explanation:
The correct answer to the question is: Ashes
Q.
At what digit of PH scale PH is neutral?
5
3
7
10
Explanation:
The correct answer to the question is: 7
Q.
Silver nitrate is also known as____________?
Lunar Caustic
Blue Vitriol
Blue Stone
Both A & B
Explanation:
The correct answer to the question is: Lunar Caustic
Q.
Optic fibres are used in :
Endoscopy
Ultrasound scans
X-ray photos
CAT scans
Explanation:
The correct answer to the question is: Endoscopy
Q.
Which of the following is not a use of acetaldehyde ?
formation of phenolic resins
formation of mirror
antiseptic inhalant
formation of throat lozenges
Explanation:
The correct answer to the question is: formation of throat lozenges
Q.
Which of the halogen has highest electronegativity ?
Chlorine
Iodine
Fluorine
Bromine
Explanation:
The correct answer to the question is: Fluorine
Q.
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphine
Water
Phosphorus pentoxide
Phosphorus
Explanation:
The correct answer to the question is: Phosphine
Q.
Which of the following is a soft Coal?
Peat
Anthracite
Bituminous
Lignite
Explanation:
The correct answer to the question is: Bituminous
Q.
The properties which do not depend on mass of the substance are _____________?
intensive properties
Colligative properties
None of These
Extensive properties
Explanation:
The correct answer to the question is: intensive properties
Q.
In base catalyzed reaction of carbonyl compound the catalyst___________________?
increases the nucleophilic character of reagent
both a and b
acidic character of reagent
increases electrophilic character of carbonyl compound
Explanation:
The correct answer to the question is: increases the nucleophilic character of reagent
Q.
Which one of the following is caustic potash?
KOH
NaBH4
NaOH
NaCl
Explanation:
The correct answer to the question is: KOH
Q.
Soil pollution is caused by:_________?
Ozone
Acid rain
PAN
Aerosol
Explanation:
The correct answer to the question is: Acid rain
Q.
Why do we determined the boiling point of a liquid?
None of These
To check its Purity and nature
To Check temperature
To check its Acidity and Basicity
Explanation:
The correct answer to the question is: To check its Purity and nature
Q.
In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?
Hydrogen
OH
Sulphur
Oxygen
Explanation:
The correct answer to the question is: Sulphur
Q.
The halogen which reacts very slowly with halogen is________________?
Iodine
Chlorine
Bromine
Fluorine
Explanation:
The correct answer to the question is: Iodine
Q.
The O-O linkage is present in__________?
H2S2O3
H2SO8
H2 S2 O6
H2S4O6
Explanation:
The correct answer to the question is: H2SO8
Q.
Why does Ethyl Alcohol show high boiling point then Acetone?
Due to high molecular weight
Due to Hydrogen bonding
Due to its Low molecular weight
Due to its Acidic nature
Explanation:
The correct answer to the question is: Due to Hydrogen bonding
Q.
Colour in transition metal compounds is attributed to____________?
Complete ns sub-shell
Small sized metal ions
Absorption of light in UV region
Incomplete (n-1) d sub-shell
Explanation:
The correct answer to the question is: Incomplete (n-1) d sub-shell
Q.
In homologous series there is the difference of mass between adjacent members.
Q.
Parke’s process is used in the extraction of________?
Sodium
Silver
Iron
Zinc
Explanation:
The correct answer to the question is: Silver
Q.
If speed of gas molecules increases by twice on heating. What will be their kinetic energy?
decrease by four times
increases by two times
increases by four times
decreases by two times
Explanation:
The correct answer to the question is: increases by four times
Q.
All the elements in group VIA are ___________________ in nature?
polymeric
all of above
hygroscopic
metals
Explanation:
The correct answer to the question is: polymeric
Q.
The usual property of ionic crystal are:_____________?
Stable
Compound forming
gaseous form
Unstable
Explanation:
The correct answer to the question is: Compound forming
Q.
The phosphate present in sewage water which cause eutrophication Can be removed by adding:
Chlorine
Lime
Alum
permangnate
Explanation:
The correct answer to the question is: Lime
Q.
The resonance energy of benzene is__________________?
150.5 Cal/mol
250.5 kJ/mol
150.5 kJ/mol
250.5 Cal/mol
Explanation:
The correct answer to the question is: 150.5 kJ/mol
Q.
The heat required to raise the temperature of body by 1 K is called___________?
thermal capacity
water equivalent
specific heat
None of the above
Explanation:
The correct answer to the question is: thermal capacity
Q.
In unsaturated hydrocarbons electrons favour___________________?
less reactivity
none
addition reactions
substitution reactions
Explanation:
The correct answer to the question is: addition reactions
Q.
The formula of starch is__________________?
C6H10O5
C12H22O11
C6H12O6
(C6H10O5)n
Explanation:
The correct answer to the question is: (C6H10O5)n
Q.
Who is often referred to as the “father of Chemistry”?
Isaac Newton
Albert Einstein
Antoine Lavoisier
Dmitri Mendeleev
Explanation:
The correct answer to the question is: Antoine Lavoisier
Q.
Which one of the following gives white precipitate with aqueous solution of BaCl2?
Na2CrO4
NaNO3
Na2CO3
NaHCO3
Explanation:
The correct answer to the question is: Na2CO3
Q.
Column of manometer which faces liquid is __________ ?
Depressed
Compressed
Remains same
Raised
Explanation:
The correct answer to the question is: Depressed
Q.
4moles of Carbon dioxide(CO2) have _____molecules.
6.02 x 10
24.08 x 10
12.04 x 10
18.06 x 10
Explanation:
The correct answer to the question is: 24.08 x 10
Q.
According to Kinetic Molecular Theory gas molecules move in_______path?
Straight
Parabolic
Zig-zag
Hyperbolic
Explanation:
The correct answer to the question is: Straight
Q.
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
CH3-X
(CH3)2 CH – X
(CH3)3 C – X
(CH3)3 C-CH2 – X
Explanation:
The correct answer to the question is: (CH3)2 CH – X
Q.
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
75.2pm
75.3pm
75.4pm
75.5pm
Explanation:
The correct answer to the question is: 75.4pm
Q.
O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
Ethyl alcohol
HCHO
Ethylene glycol
Ethylene oxide
Explanation:
The correct answer to the question is: HCHO
Q.
The bond energy of Hydrogen molecule is__________?
104Kcal/mol
110Kcal/mol
150KJcal/mol
106Kcal/mol
Explanation:
The correct answer to the question is: 104Kcal/mol
Q.
The following alcohol does not undergo oxidation is _____________?
1° alcohol
3° alcohol
0° alcohol
2° alcohol
Explanation:
The correct answer to the question is: 3° alcohol
Q.
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
The absence of Oxygen
The presence of Hydrogen
The presence of Oxygen
The presence of excessive Oxygen
Explanation:
The correct answer to the question is: The absence of Oxygen
Q.
SN2 reaction can be best carried out with__________________?
primary alkyl halide
tertiary alkyl halide
secondary alkyl halide
all
Explanation:
The correct answer to the question is: primary alkyl halide
Q.
Magnesium metal does not burn in the vessel containing_______________?
N2 and O2
Ne
O2
N2
Explanation:
The correct answer to the question is: Ne
Q.
Which is fused cyclic aromatic compound _____________________?
diphenyl amine
biphenyl
naphthalene
diphenyl methane
Explanation:
The correct answer to the question is: naphthalene
Q.
Potassium Permanganate is used for purifying drinking water, because_________?
It is a sterilising agent.
It is a reducing agent.
It dissolves the impurities of water.
It is an oxidising agent.
Explanation:
The correct answer to the question is: It is an oxidising agent.
Q.
Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
Alkali metals
Aldehydes
Halides
Ketones
Explanation:
The correct answer to the question is: Halides
Q.
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
tertiary alcohol
secondary alcohol
primary alcohol
dihydric alcohol
Explanation:
The correct answer to the question is: tertiary alcohol
Q.
The metallurgical process in which a metal is obtained in a fused state is called__________?
calcinations
roasting
smelting
froth floatation
Explanation:
The correct answer to the question is: smelting
Q.
The gas which cannot be dried by conc. H2SO4 ?
H2S
SO2
C2H4
CO2
Explanation:
The correct answer to the question is: H2S
Q.
Ce58 is a member of__________?
d-block
P-block
f-block
S-block
Explanation:
The correct answer to the question is: f-block
Q.
Fluorine can react with_________________?
Kr
All of the above
Xe
Rn
Explanation:
The correct answer to the question is: All of the above
Q.
FeSO4 forms brown ring with________________?
NO2
N2O
N2O3
NO
Explanation:
The correct answer to the question is: NO
Q.
The Branch of chemistry dealing with brewing and distilling is called _______ ?
Zootaxy
Zymurgy
Zygology
Zymology
Explanation:
The correct answer to the question is: Zymurgy
Q.
In diaphragm cell hydrogen is discharged by the reduction of__________________?
HCI
NaCl
Water
Na+
Explanation:
The correct answer to the question is: Water
Q.
The rays that have negative charge are ___________?
Canal Rays
Anode Rays
Cathode Rays
Gamma Rays
Explanation:
The correct answer to the question is: Cathode Rays
Q.
What is the formula of Silver nitrate?
AgNO3
AgNO2
AgNO4
AgNO
Explanation:
The correct answer to the question is: AgNO3
Q.
Coal gas is made up of mostly ________ & _________?
Hydrogen & Water
Hydrogen & Carbon dioxide
Carbonmonoxdide & water
Hydrogen & Methane
Explanation:
The correct answer to the question is: Hydrogen & Methane
Q.
Removal of CO2 is called_____________________?
esterification
carboxylation
hydroxylation
decarboxylation
Explanation:
The correct answer to the question is: decarboxylation
Q.
The oxidation state of cu which are expected to be diamagnetic
Cu+4
Cu+3
Cu+1
Cu+2
Explanation:
The correct answer to the question is: Cu+1
Q.
The marsh gas is ___________?
Butane
Methane
Propane
Ethane
Explanation:
The correct answer to the question is: Methane
Q.
The maximum oxidation shown by manages is_________?
+2
+4
+7
+5
Explanation:
The correct answer to the question is: +7
Q.
The oxides of beryllium BeO is_______________?
Neutral
Basic
Amphoteric
Acidic
Explanation:
The correct answer to the question is: Amphoteric
Q.
When one hydrogen atom of alkane is removed then it is called________________?
alkyl
alkene
aldehyde
saturated hydrocarbon
Explanation:
The correct answer to the question is: alkyl
Q.
Which of the following is a neutral particle ?
Proton
Neutron
Electron
Alpha particle
Explanation:
The correct answer to the question is: Neutron
Q.
Boron in soil has been considered micronutrient for_________________?
Soil porocity
Proper growth of plants
All
Alkalinity of soil
Explanation:
The correct answer to the question is: Proper growth of plants
Q.
What is the Chemical formula of Zinc Hydroxide _________ ?
Zn(OH)2
ZNO2
Zn2(OH)3
ZnOH
Explanation:
The correct answer to the question is: Zn(OH)2
Q.
The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
Cl2
I2
F2
Br2
Explanation:
The correct answer to the question is: Cl2
Q.
Benzene gives mainly_________?
Substitution reactions
Halogenation
Addition reaction
All of these
Explanation:
The correct answer to the question is: Substitution reactions
Q.
In which compound nitrogen has maximum oxidation state____________________?
HNO3
NO2
HNO2
N2O
Explanation:
The correct answer to the question is: HNO3
Q.
In Bosch Process, that is used to separate the Hydrogen gas from water Gas, the catalyst is used ______?
Both B&C
FeO
Pt
Cr²O³
Explanation:
The correct answer to the question is: Both B&C
Q.
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
Cl2O7
ClO2
Cl2O6
Cl2O
Explanation:
The correct answer to the question is: ClO2
Q.
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
it has a low specific heat capacity
it reflects most of the heat from the sun
it has a high latent heat of fusion
it becomes very hard
Explanation:
The correct answer to the question is: it has a high latent heat of fusion
Q.
The source of the Sun’s energy is the process of ____________?
Nuclear fission
Nuclear fusion
Thermionic emission
Photoelectric emission
Explanation:
The correct answer to the question is: Nuclear fusion
Q.
The metal which is used in thermite process because of its activity is____________________?
iron
zinc
copper
aluminium
Explanation:
The correct answer to the question is: aluminium
Q.
LiAlH4 converts Acetaldehyde into ___________?
Acetic acid
Ethyl alcohol
Methane
Methyl alcohol
Explanation:
The correct answer to the question is: Ethyl alcohol
Q.
The solution remaining after the formation of crystals is called ___________________?
both A & B
Dilute solution
Mother liquor
Residue
Explanation:
The correct answer to the question is: Mother liquor
Q.
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
a dehydrating agent
as sulphonating agent
an oxidizing agent
an acid
Explanation:
The correct answer to the question is: a dehydrating agent
Q.
Which one is a pure carbon?
Coal Tar
Coke
None of These
Coal gas
Explanation:
The correct answer to the question is: Coke
Q.
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?
Gay Lussac’s law
Henry’s law
Dalton’s law
Raoult’s law
Explanation:
The correct answer to the question is: Henry’s law
Q.
When phenol is heated with concentrated nitric acid the product is________________?
o-nitrophenol
1 3 5 -trinitro benzene
Picric acid
p-nitrophenol
Explanation:
The correct answer to the question is: Picric acid
Q.
The systematic name of sucrose is_______?
11-α-D-glucopyranosyl-2-β-D-fructofuranoside
1-α-D- glucofuranosyl-2-α-D- fructopyranoside
1-β- D- glucofuranosyl-2-α- D- fructofuranoside
1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Explanation:
The correct answer to the question is: 1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Q.
Iodoform test can be used to distinguish between_________________?
all of the above
acetaldehyde and methanal
ethanol and methanol
acetone and diethyl ketone
Explanation:
The correct answer to the question is: all of the above
Q.
What are the metal bearing rocks called?
Ores
Bitumen
Metalloids
Bauxite
Explanation:
The correct answer to the question is: Ores
Q.
Find the PH of a 0.001 M solution of Nitric acid HNO3?
3
2
4
5
Explanation:
The correct answer to the question is: 3
Q.
Which one does not give borax bead test_________________?
Nickel sulphate
Copper sulphate
Barium sulphate
Cobalt sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
Removal of halogen and hydrogen atom is_________________?
dehydrohalogenation
dehalogenation
hydrohalogenation
halogenation
Explanation:
The correct answer to the question is: dehydrohalogenation
Q.
Cathode is a metalic plate where__________ takes place.
Substitution
Redox
Oxidation
Reduction
Explanation:
The correct answer to the question is: Reduction
Q.
In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
Sodium
H²O
Flouride
None of them
Explanation:
The correct answer to the question is: H²O
Q.
Borax is a white crystalline solid and it is_________________?
Insoluble in water
More soluble in cold water
Soluble only in organic solvents
More soluble in hot water
Explanation:
The correct answer to the question is: More soluble in hot water
Q.
Which allotropic form of phosphorous is the most stable ?
red
Violet
White
black
Explanation:
The correct answer to the question is: black
Q.
Preparation of vegetable ghee involves_________________?
hydrogenation
halogenation
hydroxylation
hydration
Explanation:
The correct answer to the question is: hydrogenation
Q.
which Compound Destroy The OZONE ?
CFCs
None Of These
BOTH A & B
CH3COOH
Explanation:
The correct answer to the question is: CFCs
Q.
The medium which interact with long lived pollutant is:_____________?
Sink
Source
All of them
Receptor
Explanation:
The correct answer to the question is: Sink
Q.
Acetaldehyde cannot show
Benedict’s test
Lucas test
Tollen’s test
Iodoform test
Explanation:
The correct answer to the question is: Lucas test
Q.
Which of the following is the use of Silver nitrate?
All of these
used as mordant in dyeing
used in photography and medicines
used in making green pigments
Explanation:
The correct answer to the question is: used in photography and medicines
Q.
Which one of the following pairs shown diagonal relationship in the periodic table ?
Lithium and beryllium
Sodium and Lithium
Boron and Beryllium
Lithium and magnesium
Explanation:
The correct answer to the question is: Lithium and magnesium
Q.
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
Necleophilic substitution
Electrophilic addition
Nucleophilic addition
Electrophilic substitution
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
oxide ion
hydrogen ion
hydride ion
methoxide ion
Explanation:
The correct answer to the question is: hydride ion
Q.
Photographic plates are coated with a thin film of _________________?
AgBr
AgCl
AgNO3
AgI
Explanation:
The correct answer to the question is: AgBr
Q.
One Water molecule can form maximum ______hydrogen bonds.
None
4
2
3
Explanation:
The correct answer to the question is: 4
Q.
Boyle’s Law was given by the Robert Boyle in_______?
1662
1663
1660
1661
Explanation:
The correct answer to the question is: 1662
Q.
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Maltase-diastase-zymase
Diastase-zymase-maltase
Zymase-maltase-diastase
Diastase-maltase-zymase
Explanation:
The correct answer to the question is: Diastase-maltase-zymase
Q.
The chemical composition of cinnabar is__________________?
FeS
PbS
HgS
ZnS
Explanation:
The correct answer to the question is: HgS
Q.
Identify the unsaturated compound that does not give red ppts when treated with____________Ammonical cuprous chloride
CH-CH-CHCCH(1-Pentyne)
CH=CH
CH-CCH(1-Propyne)
CH-CH-CCH (1-Butyne)
Explanation:
The correct answer to the question is: CH=CH
Q.
Raney nickel is prepared from ______________________ by treating with caustic soda?
Ni-Mg alloy
Ni-Fe alloy
Ni-Cu alloy
Ni-Al alloy
Explanation:
The correct answer to the question is: Ni-Al alloy
Q.
The practical problem in Hydrogen production is it:______________?
Weight
Chemical property
Size
Valency
Explanation:
The correct answer to the question is: Weight
Q.
Which of the following shows electrical conduction_____?
Diamond
Sodium
Graphite
Potassium
Explanation:
The correct answer to the question is: Graphite
Q.
Chlorination of toluene in the presence of sublight produces_________________?
p – chlorotoluene
o – chlorotoluene
Benzyl chloride
benzoic acid
Explanation:
The correct answer to the question is: Benzyl chloride
Q.
Octane number is 0 value for ___________?
n-hexane
iso-heptane
n-heptane
iso-octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Which one of the following substances conducts electricity by the movement of ions ?
Graphite
Molten sodium chloride
Copper
Mercury
Explanation:
The correct answer to the question is: Molten sodium chloride
Q.
The fundamental way to transfer energy are:_____________?
heat and work
pressure and temperature
pressure and volume
heat and volume
Explanation:
The correct answer to the question is: heat and work
Q.
The main buffer system of the human blood is____________?
CHCOOH – CHCOO
NHCONH – NHCONH
HCO – CO
HCO – HCO
Explanation:
The correct answer to the question is: HCO – HCO
Q.
The acetylene molecule contains:___________?
5 sigma bonds
4 sigma and 1 pi bonds
2 sigma and 3 pi bonds
3 sigma and 2 pi bonds
Explanation:
The correct answer to the question is: 3 sigma and 2 pi bonds
Q.
Black foot disease is caused by the pollution of groundwater as a consequence of increased seepage of:__________?
Fluorides
Mercury
Arsenic
Nitrates
Explanation:
The correct answer to the question is: Arsenic
Q.
Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Sabatier Senderns reaction involve _____________ in presence of Ni?
alkene & N2
alkene & O2
alkyne & Cl2
Aalkene & H2
Explanation:
The correct answer to the question is: Aalkene & H2
Q.
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
2
4
6
1
Explanation:
The correct answer to the question is: 4
Q.
Surface Tension ________with increasing the surface area of liquid?
Increases
Remains Same
Decreases
None
Explanation:
The correct answer to the question is: Decreases
Q.
Which of the following reagents will react with both aldehydes and ketones ?
Tollens reagent
Benedicts reagent
Grignard reagent
Fehlings reagent
Explanation:
The correct answer to the question is: Grignard reagent
Q.
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
this acid, in ancient times, was used to eliminate ant-hills
ants are attracted by the odour of this acid
this acid was first obtained by the distillation of ants
this corrosive acid is secreted by ants to drive away their enemies
Explanation:
The correct answer to the question is: this acid was first obtained by the distillation of ants
Q.
Soda lime is a mixture of____________________?
CaO and KOH
NaOH and Na2O
Na2O and KOH
CaO and NaOH
Explanation:
The correct answer to the question is: CaO and NaOH
Q.
Ethanol can be converted into ethanoic acid by_________________?
Fermentation
Oxidation
Hydration
Hydrogenation
Explanation:
The correct answer to the question is: Oxidation
Q.
The most useful dye for those fabric which can form hydrogen bonds is:_____________?
Direct dye
Mordent dye
Vat dye
Acid dye
Explanation:
The correct answer to the question is: Direct dye
Q.
Sodium is not observed in +2 oxidation state because of its__________________?
high first ionization potential
high electronegativity
high ionic radius
high second ioniation potential
Explanation:
The correct answer to the question is: high second ioniation potential
Q.
Which one of the following is the weakest acid in water__________________?
HBr
HI
HCI
HF
Explanation:
The correct answer to the question is: HF
Q.
Which of the following sulphates is not soluble in water ?
Sodium sulphate
Potassium sulphate
Barium sulphate
Zinc sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
78% Fe
77% Fe
74% Fe
75% Fe
Explanation:
The correct answer to the question is: 78% Fe
Q.
The earth absorb radiation in Visible range but emit radiation at the same rate in the:
Ultra voilet
All of these
Infrared
Gamma rays
Explanation:
The correct answer to the question is: Infrared
Q.
Product of Nucleophilic Substitution Uni Molecular reaction is in case of chiral substrate?
Retention
Stereospecific
Inversion
Recemic Mixture
Explanation:
The correct answer to the question is: Recemic Mixture
Q.
The Electronegativity of Hydrogen is _____.
1.8
3.1
2.2
2.8
Explanation:
The correct answer to the question is: 2.2
Q.
The valency of carbon Atom is __________ ?
3
1
2
4
Explanation:
The correct answer to the question is: 4
Q.
Elements which emit natural radioactivity are known as __________ ?
Radioactive elements
Nuclear elements
Radio elements
Active elements
Explanation:
The correct answer to the question is: Radioactive elements
Q.
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
0.015
0.215
0.115
0.900
Explanation:
The correct answer to the question is: 0.115
Q.
The typical reactions of aldehyde is _____________?
Nucleophilic substitution
Nucleophilic elimination
Electrophilic addition
Nucleophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Which among the following is not a property of Ionic bond _________?
Gain of electrons
Transfer of electrons
Sharing of electrons
Losing of electrons
Explanation:
The correct answer to the question is: Sharing of electrons
Q.
One fathom is equal to:__________?
60 feet
100 cm
6 feet
6 meters
Explanation:
The correct answer to the question is: 6 feet
Q.
Silicon differ from silica by a group of__________________?
O2
OCH3
Ch3
OH
Explanation:
The correct answer to the question is: Ch3
Q.
A metallic atom loses its valence electron to form a/an _________?
an anion – cation
an anion
none of these
a cation
Explanation:
The correct answer to the question is: a cation
Q.
Which compound shows hydrogen bonding ?
C2H5OH
C2H5Cl
C2H6
CH3OCH3
Explanation:
The correct answer to the question is: C2H5OH
Q.
Which of the following alloys contain(s) Cu and Zn?
Gun-metal
Type metal
Brass
Bronze
Explanation:
The correct answer to the question is: Brass
Q.
Noble gases are so called zero group because they have:_________?
Zero Electronegativity
Both A and B
Zero Valency
Zero Electron Affinity
Explanation:
The correct answer to the question is: Both A and B
Q.
Magnetic quantum number specifies___________?
Shape of orbitals
All of the above
Size of orbitals
Orientation of orbitals
Explanation:
The correct answer to the question is: Orientation of orbitals
Q.
2-Butyne contains:______________?
both sp and sp hybridised carbon atoms
sp hybridised carbon atoms only
both sp and sp hybridised carbon atoms
sp hybridised carbon atoms only
Explanation:
The correct answer to the question is: both sp and sp hybridised carbon atoms
Q.
Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
Tartaric acid
Valeric acid
Lactic acid
Propanoic acid
Explanation:
The correct answer to the question is: Lactic acid
Q.
How many isomeric aldoses are possible for the molecular formula C6H12O6?
7
4
2
16
Explanation:
The correct answer to the question is: 16
Q.
Lead battery is secondary battery the paste used in it is______________?
Magnese dioxide
Ammonium chloride
AOT
Zinc chloride
Explanation:
The correct answer to the question is: AOT
Q.
Identify the Lucas reagent among the following
Dil. HCl & hydrated ZnCl
Conc. HCl & Anhydrous ZnCl
Conc. HNO & Anhydrous ZnCl
Conc. HNO & Anhydrous MgCl
Explanation:
The correct answer to the question is: Conc. HCl & Anhydrous ZnCl
Q.
The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?
7
5
6
8
Explanation:
The correct answer to the question is: 5
Q.
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
S-Block
f-Block
P-Block
d-Block
Explanation:
The correct answer to the question is: f-Block
Q.
Which compound will readily undergo sulphonation ?
Chlorobenzene
Benzene
Toluene
Nitro benzene
Explanation:
The correct answer to the question is: Toluene
Q.
If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?
CH2O
CHO2
CH2
C2H2O4
Explanation:
The correct answer to the question is: CHO2
Q.
The Ionization energy of Hydrogen is __________?
10.54ev
17.56ev
13.6ev
12.54ev
Explanation:
The correct answer to the question is: 13.6ev
Q.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
acetone
accetaldehyde
benzaldehyde
formaldehyde
Explanation:
The correct answer to the question is: acetone
Q.
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
Beta particle
Alpha particle
Gamma particle
Negative particle
Explanation:
The correct answer to the question is: Alpha particle
Q.
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
Iodine
Chlorine
Fluorine
Bromine
Explanation:
The correct answer to the question is: Iodine
Q.
The molecules of which gas have highest speed?
H at -73C
O at 0C
N at 1,027C
CH at 300 K
Explanation:
The correct answer to the question is: H at -73C
Q.
Boron is non metal while other elements of IIIA group are metals. This is because______________?
it forms molecular addition compounds
all of the above
it has high nuclear charge
it has small size
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following will not give addition reaction with NaHSO3________________?
CH3CHO
CH3-CH2-CHO
None of the above
HCHO
Explanation:
The correct answer to the question is: CH3-CH2-CHO
Q.
The common oxidation state of lanthanides is_________?
+4
+2
+1
+3
Explanation:
The correct answer to the question is: +3
Q.
The decomposition of nitroglycerine is an example of:
Self catalytic reaction
Enzyme catalytic reaction
Autocatalytic reaction
induced catalysis
Explanation:
The correct answer to the question is: Autocatalytic reaction
Q.
Which of the following will give phosphoric acid one reaction with water_________________?
P2O3
P2O5
All of the above
PCI5
Explanation:
The correct answer to the question is: All of the above
Q.
Which one of the following serve as aquatic solar fuel cell:
Fungi
Algae
Virus
Bacteria
Explanation:
The correct answer to the question is: Algae
Q.
The Bond Energy of H-F is________?
562kJ/mol
None
281kJ/mol
456kJ/mol
Explanation:
The correct answer to the question is: 562kJ/mol
Q.
Barometer was invented by _______?
Torricelli
Pascal
Huygen
Newton
Explanation:
The correct answer to the question is: Torricelli
Q.
Which of the following do not give aldol condensation reactions ?
diemthyl ketone
propionaldehyde
acetaldehyde
formaldehyde
Explanation:
The correct answer to the question is: formaldehyde
Q.
Electromeric effect is ____________?
Operate due to electronegativity difference
None of the above
temporary effect
Permanent effect
Explanation:
The correct answer to the question is: temporary effect
Q.
In electrolysis of NaCl the product obtained at cathode is_______.
Remain at the bottom of the cell
Chloride ions
Both
Sodium ions
Explanation:
The correct answer to the question is: Sodium ions
Q.
The term internal salt refers to_____________________?
Basic character of amino acids
Dipolar character of amino acids
Non-polar structure of amino acids
Acidic character of amino acids
Explanation:
The correct answer to the question is: Dipolar character of amino acids
Q.
The composition of brown ring in nitrate test is_________________?
FeSO4.No
FeSO4.No2
FeSO4.N2o
FeSO4.No3
Explanation:
The correct answer to the question is: FeSO4.No
Q.
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
R/2
R/4
3R/4
2 R
Explanation:
The correct answer to the question is: 3R/4
Q.
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Potassium
Lithium
Rubidium
Sodium
Explanation:
The correct answer to the question is: Lithium
Q.
Which of the following is most soluble on water?
SrSO4
CaSO4
MgSO4
BaSO4
Explanation:
The correct answer to the question is: MgSO4
Q.
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
Addition reaction
Oxidation reaction
Substitution reaction
Elimination reaction
Explanation:
The correct answer to the question is: Oxidation reaction
Q.
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
They have smaller atomic sizes
They are more reactive
They have greater atomic radii
All
Explanation:
The correct answer to the question is: They have smaller atomic sizes
Q.
Hydrogen bonding is present in __________?
Phenol
All of these
Ethyl Alcohol
Water
Explanation:
The correct answer to the question is: All of these
Q.
Chlorine Cl when attached to benzene has________?
-1 and +R effect
+1 and -R effect
-I and -R effect
+I and +R effect
Explanation:
The correct answer to the question is: -1 and +R effect
Q.
Compound containing two halogen atoms on two adjacent carbon atoms are called as ___________?
Geminal dihalides
Glycols
Vicinal dihalides
Diols
Explanation:
The correct answer to the question is: Vicinal dihalides
Q.
The colour of chlorine gas is_______________?
freenish yellow
grayish black
pale yellow
reddish brown
Explanation:
The correct answer to the question is: freenish yellow