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