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