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