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