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