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Top Chemistry MCQS Questions
Q.
Transition temperature for tin grey & tin white is : _____________?
246.12°C
96°C
128.15°C
18°C
Explanation:
The correct answer to the question is: 18°C
Q.
Beillstein test is used for________?
N2
CO
CO2
Cl
Explanation:
The correct answer to the question is: Cl
Q.
Main use of salt in diet is to : ___________?
inclease solubility of food particles in water
ease the process of cooking
increase the taste
produce small amount of hydrochloric acid required for digestion
Explanation:
The correct answer to the question is: produce small amount of hydrochloric acid required for digestion
Q.
Quantum numbers are __________ ?
Leometric values
Numerical values
Arithmetical values
Logical values
Explanation:
The correct answer to the question is: Numerical values
Q.
Hexamethylene diamine and adipic acid combine to form _____________?
nylon 6-6
Natural rubber
Synthetic rubber
Polystyrene
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Which of the following does not give Borax bead test ?
Cr
Cu
A1
Ni
Explanation:
The correct answer to the question is: A1
Q.
The concept of ensemble was introduced by____________?
Gibbs
Boltzmann
Carnot
Mexwell
Explanation:
The correct answer to the question is: Gibbs
Q.
Which of the following is used in photography?
Na2S
NaHSO3
Na2SO3
Na2S2O3
Explanation:
The correct answer to the question is: Na2S2O3
Q.
At higher temperature, Ethyne on reaction with water in the presence of HgSO4 and H2SO4 gives:
Ethyl alcohol
Acetaldehyde
Acetone
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___________________?
Order of reaction
Extent of a reaction
Rate of reaction
Mole of a reaction
Explanation:
The correct answer to the question is: Order of reaction
Q.
The Clemmenson reduction of acetone yields
Propane
Propanol
Ethanol
Ethanal
Explanation:
The correct answer to the question is: Propane
Q.
One of the outstanding features of boron is its ability to form__________________?
Molecular addition compounds
Molecular crystals
Ionic compounds
Semiconductors
Explanation:
The correct answer to the question is: Molecular addition compounds
Q.
__________ is one of the allotropic modifications of carbon.
Graphite
Diamond
Silicon
Iodine
Explanation:
The correct answer to the question is: Diamond
Q.
Which of the following statement is correct ?
size of Na atom < Na+ ion
size of Cl atoms > Cl- ion
Cl- < Na+
size of Na+ ion < Na atom
Explanation:
The correct answer to the question is: size of Na+ ion < Na atom
Q.
Basicity of orthophosphoric acid is________?
3
2
5
4
Explanation:
The correct answer to the question is: 3
Q.
Which one of the following carbonate is water insoluble ?
CaCO3
(NH4)2CO3
Na2CO3
K2CO3
Explanation:
The correct answer to the question is: CaCO3
Q.
The molecular formula of Sucrose(Sugar) is___________?
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____.
Ethanol
Methane
Urea
Acetic acid
Explanation:
The correct answer to the question is: Urea
Q.
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Intermolecular H-bonding
Inductive effect
Resonance effect
Isomeric effect
Explanation:
The correct answer to the question is: Intermolecular H-bonding
Q.
Which of the following shows inert pair effect ?
carbon
boron
silicon
tin
Explanation:
The correct answer to the question is: tin
Q.
Which one can form complex ?
Na
K
Li
Cr
Explanation:
The correct answer to the question is: Li
Q.
The strongest hydrogen bonding is present in: _____________?
Ammonia gas
Acetone and chloroform
Ice
Ethanol
Explanation:
The correct answer to the question is: Ice
Q.
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Decomposition
Both b & c
Reduction
Oxidation
Explanation:
The correct answer to the question is: Both b & c
Q.
Which one is natron ?
Na2CO3
NaHCO3
Na2CO3.10H2O
Na2CO3.H2O
Explanation:
The correct answer to the question is: Na2CO3.H2O
Q.
Radiations are harmful as it:___________?
is unstable
Alters body tissue
Causes anemia
Causes skin cancer
Explanation:
The correct answer to the question is: Causes skin cancer
Q.
The chemical formula of sodium hypochlorite is________________?
NaCLO
NaClO3
NaClO4
NaClO2
Explanation:
The correct answer to the question is: NaCLO
Q.
Which C-X bond has the highest bond energy per mole ?
C-C
C-I
C-F
C-Br
Explanation:
The correct answer to the question is: C-F
Q.
In water molecule, Hydrogen & water are held together by ______ bond.
Ionic
Hydrogen
Dating
Covalent
Explanation:
The correct answer to the question is: Covalent
Q.
Which of the halogen can displace other three elements ?
Chlorine
Flourine
Iodine
Bromine
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_____.
Cracking
Reforming
Refining
Isomerization
Explanation:
The correct answer to the question is: Cracking
Q.
Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
propanone
formaldehyde
carbondioxide
acetaldehyde
Explanation:
The correct answer to the question is: carbondioxide
Q.
The ore CaSO4.H2O has the general name_______________?
Calcite
Dolomite
Plaster of Paris
Gypsum
Explanation:
The correct answer to the question is: Gypsum
Q.
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
condensation polymerization
additional polymertization
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?
Boyle’s law
None of these
Graham’s Law
Gay-Lussac’s law
Explanation:
The correct answer to the question is: Graham’s Law
Q.
Identify the correct statement regarding CO_______________?
it reacts with red blood cells of haemoglobin
it is powerful oxidizing agent
it is used to prepare aerated drinks
it combines with H2O to form carbonic acid
Explanation:
The correct answer to the question is: it reacts with red blood cells of haemoglobin
Q.
Treatment of sucrose with conc. HNO3 gives__________?
Oxalic acid
Nitrosucrose
Laevulinic acid
Glucose+ fructose
Explanation:
The correct answer to the question is: Nitrosucrose
Q.
Ethers show functional group isomerism with __________________?
aldehydes
alcohols
ketones
carboxylic acid
Explanation:
The correct answer to the question is: alcohols
Q.
which of the following is a non-crystalline solid pair?
diamond, wood
sucrose. glass
wood, glass
glass, table salt
Explanation:
The correct answer to the question is: wood, glass
Q.
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
2 moles of butane
1 mole of ethane
1 mole of butane
2 moles of ethane
Explanation:
The correct answer to the question is: 1 mole of butane
Q.
Polyethylene Glycols are used in the preparation of which type of detergents?
All of above
Anionic detergents
Cationic detergents
Non-ionic detergents soap
Explanation:
The correct answer to the question is: Non-ionic detergents soap
Q.
Phenol was isolated by Runge from________________?
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 borate
metal silicate
metal boride
metal meta borate
Explanation:
The correct answer to the question is: metal meta borate
Q.
The radiations with highest speed are _______.
Gamma radiations
Alpha radiations
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
Nitriding
Quenching
Tempering
Explanation:
The correct answer to the question is: Annealing
Q.
If volumetric analysis methyl orange indicator is used when_________?
Acid is strong
Bade is strong
Acid is strong base is weak
Acid is weak
Explanation:
The correct answer to the question is: Acid is strong
Q.
The weight of a metal of equivalent of 12 which will give 0.475g of its chloride is_______?
0.24g
0.16g
0.18g
0.12g
Explanation:
The correct answer to the question is: 0.18g
Q.
Which of the following aqueous solutions would have the highest boiling point?
0.25 m sucrose
0.15 m CaCl2
0.20 m glucose
0.20 m NaCl
Explanation:
The correct answer to the question is: 0.15 m CaCl2
Q.
The formula of palmitic acid_________________?
C17H35COOH
C15H31COOH
C13H27COOH
C17H33COOH
Explanation:
The correct answer to the question is: C15H31COOH
Q.
Which one of the following is not an alkali metal ?
Caesium
Radium
Rubidium
Francium
Explanation:
The correct answer to the question is: Radium
Q.
Who discovered carbohydrates fats and proteins?
Jons Jacob Berzelius
William Prout
Walter Bradford Cannon
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
Only Water
Only oxygen
Hydrogen Gas &Water
Explanation:
The correct answer to the question is: Hydrogen Gas &Water
Q.
Which of the following is the weakest reducing agent ?
HBr
HF
HC
HI
Explanation:
The correct answer to the question is: HF
Q.
During sulphonation of benzene H2SO4 generates the electrophile _________________?
SO2
HSO4-
SO3
H+
Explanation:
The correct answer to the question is: SO3
Q.
Size of colloidal particles
In b/w true solution & suspension
greater than true solution
None of These
greater than suspension
Explanation:
The correct answer to the question is: In b/w true solution & suspension
Q.
Which of the following statements is incorrect about fluorine_______________?
fluorine follows octet rule and as well as extended octet rule
fluorine is restricted to -1 oxidation state
fluorine has lowest dissociation energy among the halogens
both B and C
Explanation:
The correct answer to the question is: both B and C
Q.
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
ethanol
carbonic acid
methanoic acid
acetic acid
Explanation:
The correct answer to the question is: acetic acid
Q.
Antiseptic Urotropine formed by ____________?
Formaldehyde
Acetaldehyde
Ketone
Carboxylic acid
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 HCN
reaction with 2 4 dinitrophenyl hydrazine
reaction with NaHSO3
reaction with Fehling solution
Explanation:
The correct answer to the question is: reaction with Fehling solution
Q.
Which one is Chloroform_________________?
CCl4
CHCl3
CH2Cl2
CH3Cl
Explanation:
The correct answer to the question is: CHCl3
Q.
Which of the following is not the name of any scientist?
Hund’s rule
Pauli exclusion principle
Aufbau’s principle
Le-Chatelier’s principle
Explanation:
The correct answer to the question is: Aufbau’s principle
Q.
Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?
Friedel & Craft acylation
Clemmenson reduction
Friedel & Craft alkylation
Dows process
Explanation:
The correct answer to the question is: Friedel & Craft alkylation
Q.
Methyl alcohol is not used__________________?
As an antifreezing agent
As a solvent
As a substitute for petrol
For denaturing of ethyl alcohol
Explanation:
The correct answer to the question is: As a substitute for petrol
Q.
Phonon is Quantum of___________?
Longitudinal wave
Transverse wave
Electromagnetic wave
Elastic wave
Explanation:
The correct answer to the question is: Elastic wave
Q.
Aluminium oxide is_________________?
Amphoteric oxide
It does not exists
Acidic oxide
Basic oxide
Explanation:
The correct answer to the question is: Amphoteric oxide
Q.
Which one of the following is also known as lactic acid ?
3-Hydroxy propanoic acid
2-Hydroxy propanoic acid
2-hydroxy butanoic acid
3-hydroxy butanoic acid
Explanation:
The correct answer to the question is: 2-Hydroxy propanoic acid
Q.
How much solar flux absorb by earth’s surface is used to drive hydrologic cycle:
1/5th
1/2sec
1/4th
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
H2P2O7
H3PO3
Explanation:
The correct answer to the question is: H3PO2
Q.
In Dry cell, cathode is made up of_______?
Carbon (Graphite)
ZnCl²
Zinc
MnO²(Pyrolusite)
Explanation:
The correct answer to the question is: Carbon (Graphite)
Q.
Which one of the following is termed as benzul alcohol ?
C6H5CH2OH
C6H5COOH
C6H5CH(OH)2
C6H5OH
Explanation:
The correct answer to the question is: C6H5CH2OH
Q.
Which of the following substances does not give iodoform test ?
acetone
acetaldehyde
methyl alcohol
ethyl alcohol
Explanation:
The correct answer to the question is: methyl alcohol
Q.
The purpose of Smelting an ore is to________?
Reduce it
Separate volatile impurities
Obtain an alloy
Oxidize it
Explanation:
The correct answer to the question is: Reduce it
Q.
On reduction with LiAlH4 ,Ketone gives__________?
Tertiary alcohol
Primary Alcohol
Secondary Alcohol
None of These
Explanation:
The correct answer to the question is: Secondary Alcohol
Q.
Which one of the following methods will not give benzene ?
Distilling phenol with Zn dust
Hydrolysis of benzene sulphonic acid with super heated steam
Heating sod. Salt of Benzoic acid with soda lime
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
NaCl
Iodine solution
Ki
Explanation:
The correct answer to the question is: Chlorine
Q.
Methyl radical is ___________?
Sp hybrid having linear geometry
Sp3 hybrid having 8 electrons
sp2 hybrid having 7 electron
Sp2 hybrid having 6 electron
Explanation:
The correct answer to the question is: sp2 hybrid having 7 electron
Q.
Give Electronic configuration of Sodium:
1s2,2s2,2p6,3s1
1s2,2s2,2p6,3s2
None of these
1s2,2s2,2p6
Explanation:
The correct answer to the question is: 1s2,2s2,2p6,3s1
Q.
The most electronegative element among the following is_________________?
N
As
Sb
P
Explanation:
The correct answer to the question is: N
Q.
A theoretical link between quantum mechanics and thermodynamics is_________?
Soectroscopic analysis
Electrchemistry
Matrix mechanics
Statistical thermodynamics
Explanation:
The correct answer to the question is: Statistical thermodynamics
Q.
Which of the following has lowest lattice energy?
CsI
NaCl
KBr
LiF
Explanation:
The correct answer to the question is: CsI
Q.
Ketones and Aldehydes are differentiate by using ______________?
Nitroprusside test
Silver Mirror test
Bendict solution
Fehling solution
Explanation:
The correct answer to the question is: Nitroprusside test
Q.
Nitration of chlorobenzene gives___________________?
A & B
m – chloronitrobenzene
o – chloronitrobenzene
p – chloronitrobenzene
Explanation:
The correct answer to the question is: A & B
Q.
What is the molecular Weight of Nitric acid (HNO3 ) ?
70.012 g/mol
63.012 g/mol
81.011 g/mol
65.012 g/mol
Explanation:
The correct answer to the question is: 63.012 g/mol
Q.
Which of the following will be acidic_____________?
propyne
1-butyne
ethyne
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following is soluble in water?
AgF
AgBr
AgCl
AgI
Explanation:
The correct answer to the question is: AgF
Q.
How many electrons are there in benzene to form delocalized electron cloud________________?
4
6
8
3
Explanation:
The correct answer to the question is: 6
Q.
Which of the following is different with respect to physical appearance ?
Antimony
Phosphorus
Arsenic
Bismuth
Explanation:
The correct answer to the question is: Phosphorus
Q.
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
normal-alkane
iso-alkane
neo-alkane
branched-alkane
Explanation:
The correct answer to the question is: iso-alkane
Q.
Molozonide is unstable and changes into ozonide on_________________?
reduction
rearrangement
oxidation
hydrolysis
Explanation:
The correct answer to the question is: rearrangement
Q.
Which one of following is not a property of pure quartz ?
Brittle
Hard
Coloured solid
All of above
Explanation:
The correct answer to the question is: Coloured solid
Q.
SO2 reacts with Cl in sunlight to form__________?
Sulphur dioxide
All of the above
Sulphuryl chloride
Suphanyl chloride
Explanation:
The correct answer to the question is: Sulphuryl chloride
Q.
The IUPAC suffix used for _______ NC group?
Carbylamines
Nitrile
Cyanide
Isocyanides
Explanation:
The correct answer to the question is: Nitrile
Q.
Identify among the following elements that does NOT belong to VIIA group
Cl
F
Br
N
Explanation:
The correct answer to the question is: N
Q.
The theory which explains the behavior of particles of matter in motion is called ______?
None
Dalton’s Theory
Bohr’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____________?
9 to 8
6 to 7
1 to 6
1 to 10
Explanation:
The correct answer to the question is: 1 to 6
Q.
Which of the following is a symmetrical ketone___________________?
acetone
butanone
2-pentanone
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:_______?
Chlorine
Sulphur
Bromine
Fluorine
Explanation:
The correct answer to the question is: Sulphur
Q.
Among the halogens the rare element is________________?
Iodine
Fluorine
Chlorine
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 __________?
Bayer’s reagent
Bromine water
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
All of the above
Open system
Explanation:
The correct answer to the question is: closed system
Q.
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
Same
Four times
Half
Double
Explanation:
The correct answer to the question is: Double
Q.
Cyclone collector is used for minimizing:____________-?
Soil pollution
Water pollution
Air pollution
Sound pollution
Explanation:
The correct answer to the question is: Air pollution
Q.
Which of the following noble gases is not present in atmosphere?
Argon
Radon
Xenon
Helium
Explanation:
The correct answer to the question is: Radon
Q.
Which of the following is not use of compounds of Fluorine________________?
None of the above
Sodium fluoroacetate is a rat poison
Cu F2 is used in ceramic industry
SbF3 is used for manufacture of pottery
Explanation:
The correct answer to the question is: None of the above
Q.
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
As nitrometer
To remove air bubbles from molten metal
As insulator
To produce alloy
Explanation:
The correct answer to the question is: To remove air bubbles from molten metal
Q.
Gypsum is applied to the soil as a source of________________?
we could not apply
Ca and P
Ca and S
S and P
Explanation:
The correct answer to the question is: Ca and S
Q.
Which of the following is more acidic in nature?
Benzene
Cresol
Aniline
Phenol
Explanation:
The correct answer to the question is: Phenol
Q.
The number of lone pairs in XeOF4 is_________?
2
3
1
O
Explanation:
The correct answer to the question is: 1
Q.
Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?
Free radicals
UV -rays
Cosmic rays
Nitrogen oxides
Explanation:
The correct answer to the question is: UV -rays
Q.
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
C6H18O3
C2H6O
C2H5O
C6H12O6
Explanation:
The correct answer to the question is: C6H18O3
Q.
Biodegradable pollutant is:_____________?
Aluminum foil
mercury salt
Domestic waste
DDT
Explanation:
The correct answer to the question is: Domestic waste
Q.
Azimuthal quantum number defines___________?
Magnetic momentum of an electron
Angular momentum of an electron
e/m ratio of an electron
Spin 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
Carboxylic acid
Ester
Ketone
Explanation:
The correct answer to the question is: Ketone
Q.
Reading of a Barometer going down is an indication of:___________?
Intense heat
Rainfall
Snow
Storm
Explanation:
The correct answer to the question is: Rainfall
Q.
Gypsum is______?
CaSO4.1/2H2O
CaSO4.3H2O
CaSO4,2H2O
CaSO4
Explanation:
The correct answer to the question is: CaSO4,2H2O
Q.
BeCl2 has the hybrid orbitaks of type_______?
Sp2
Sp
Sp3
dsp2
Explanation:
The correct answer to the question is: Sp
Q.
Those aliphatic hydrocarbons which contain carbon to carbon single covalent bond in the chain are called ___________?
Alkanes
Alkynes
a & c
Alkenes
Explanation:
The correct answer to the question is: Alkanes
Q.
Cassiterite is an ore of_______?
Ni
Sn
Mn
Sb
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__________________?
CaCl2
Ca(OH)2
CaCO3
CaO
Explanation:
The correct answer to the question is: CaO
Q.
The process of aluminium extraction is called__________________?
Thermite process
Contact process
Hall process
Haber process
Explanation:
The correct answer to the question is: Hall process
Q.
Ozonolysis of benzene produces___________________?
Glyoxal
Glycol
Both B & C
Vicinal diol
Explanation:
The correct answer to the question is: Glyoxal
Q.
Atom is the smallest particall which is_________?
Both
Divisible
Indivisible
Non of these
Explanation:
The correct answer to the question is: Indivisible
Q.
Kipps Apparatus is used to prepare_________?
Cu
H²S
NaOH
Cl²
Explanation:
The correct answer to the question is: H²S
Q.
Which of the following haloalkane is hydrolysed by SN1 mechanism?
CH3CH2Br
CH3Br
(CH3)3CBr
CH3CH2CH2Br
Explanation:
The correct answer to the question is: (CH3)3CBr
Q.
Effective volume is usually taken for ____________ ?
5 moles of gas
3moles of gas
1 mole of gas
2 moles of gas
Explanation:
The correct answer to the question is: 1 mole of gas
Q.
Aqueous solution of borax above 62°C gives crystals of________________?
Na2B4O7.5H2O
Na2B4O7.10H2O
Na2B4O7.4H2O
Na2B4O7.2H2O
Explanation:
The correct answer to the question is: Na2B4O7.5H2O
Q.
What is the density ofargon gas at a temperature of 30°C and a pressure of 1.05 atm?
1.65 g/L
1.68 g/L
None of the above
1.67 g/L
Explanation:
The correct answer to the question is: 1.68 g/L
Q.
Which of the following element has the maximum electron affinity_____?
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%
52%
60%
8%
Explanation:
The correct answer to the question is: 52%
Q.
During Electrolysis of Water the product @cathode obtained is ___________?
Oxygen Gas & Water
Hydrogen & Carbon monoxide
CO & Water
Hydrogen Gas & Water
Explanation:
The correct answer to the question is: Hydrogen Gas & Water
Q.
The method in which more steam is passed through the water Gas to oxidize CO to Carbon Dioxide which is then more soluble in water than Hydrogen gas and gets separated is called______.
liquification process
Thermal decomposition
Bosch Process
Fragmentation
Explanation:
The correct answer to the question is: Bosch Process
Q.
Chemistry is given from ……language ?
None of these
Arabic
Greek
Latin
Explanation:
The correct answer to the question is: Greek
Q.
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
O
H+
H2O
OH-
Explanation:
The correct answer to the question is: H2O
Q.
When limestone reacts with water, which gas is released?
Nitrogen
Hydrogen
Carbon Dioxide
Oxygen
Explanation:
The correct answer to the question is: Carbon Dioxide
Q.
Which one of the following results in the discovery of proton.
Alpha rays
X-rays
Canal rays
Cathode rays
Explanation:
The correct answer to the question is: Canal rays
Q.
Downs cell is used to prepare_________________?
Sodium hydroxide
Sodium bicarbonate
Sodium carbonate
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?
Cr
Fe
All of the above
A
Explanation:
The correct answer to the question is: All of the above
Q.
Special features of borate glass is that it is_________________?
Heat resistant
Used to prepare chemical garden
Green in colour
Low melting
Explanation:
The correct answer to the question is: Heat resistant
Q.
The carbon atom of carbonyl group is__________________?
dsp2 hybridized
sp hybridized
cp3 hybridized
sp2 hybridized
Explanation:
The correct answer to the question is: sp2 hybridized
Q.
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
Primary alcohol
Secondary alcohol
Tertiary alcohol
All of above
Explanation:
The correct answer to the question is: Tertiary alcohol
Q.
Example of linear polymer is ______________?
High density polythene
both A and C
Low density polythene
PVC
Explanation:
The correct answer to the question is: both A and C
Q.
Dehalogenation of ethyl tetrahalide will give____________________?
ethyl halide
ethyne
ethene
all of the above are possible
Explanation:
The correct answer to the question is: ethyne
Q.
The maximum amount of product obtained by balanced chemical equation is called as __________?
Practical yield
NOT
Theoretical yield
Actual yield
Explanation:
The correct answer to the question is: Theoretical yield
Q.
K2Cr2O7/H2SO4 generate____________________?
Nascent hydrogen[H]
Oxygen
Nascent oxygen[O]
Hydrogen
Explanation:
The correct answer to the question is: Nascent oxygen[O]
Q.
The science of fermentation is called _______ ?
Zootaxy
Zymology
Zymurgy
Zygology
Explanation:
The correct answer to the question is: Zymology
Q.
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
ethylene epoxide
ketone
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_______ ?
Acetic acid
Phenyl acetate
Acetone
Acetophenone
Explanation:
The correct answer to the question is: Acetophenone
Q.
Which of the following is used with milk of lime to kill fungus and molds?
Nitric acid
Chlorine
Copper Sulfate
Silver nitrate
Explanation:
The correct answer to the question is: Copper Sulfate
Q.
The stationary and mobile phases in paper chromatography are____________?
Solid/liquid
Liquid/solid
Liquid/gas
Liquid/liquid
Explanation:
The correct answer to the question is: Solid/liquid
Q.
R-Mg-Br is called___________________?
Grignard reagent
Metallic alkyl halide
Alkyl
Both A & B
Explanation:
The correct answer to the question is: Both A & B
Q.
Benzene does not undergo___________________?
Substitution reaction
Addition reaction
Oxidation reactions
Polymerization reactions
Explanation:
The correct answer to the question is: Polymerization reactions
Q.
When alcohol reacts with phosphorous halides it geive____________________?
alkanes
alkyl amine
alkynes
alkyl halides
Explanation:
The correct answer to the question is: alkyl halides
Q.
The bond length of C=C is___________?
1.54A°
1.20A°
1.68A°
1.34A°
Explanation:
The correct answer to the question is: 1.68A°
Q.
Universe is almost 70% made up of __________?
Carbon
Hydrogen
Helium
Chlorine
Explanation:
The correct answer to the question is: Hydrogen
Q.
Which of the following is unit of Viscosity?
Torr
Hertz
Poise
Decibell
Explanation:
The correct answer to the question is: Poise
Q.
Fehling solution react with HCHO to form precipitate of _____________?
White colour
Blue colour
Red colour
Yellow colour
Explanation:
The correct answer to the question is: Red colour
Q.
Nitronium ion is___________________?
NO2-
NO3
NO
NO2+
Explanation:
The correct answer to the question is: NO2+
Q.
Silver mirror is a test for ____________?
Ethers
Aldehydes
Amines
Thio alcohols
Explanation:
The correct answer to the question is: Aldehydes
Q.
What is the formula of Copper Sulfate?
CuSO3.5H2O
CuSO3.4H2O
CuSO4.5H2O
CuSO4.4H2O
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
Vander Waals forces are stronger in_______________?
Cl2
Br2
F2
I2
Explanation:
The correct answer to the question is: I2
Q.
Element that have same number of neutrons are called__________?
isotone
isotope
isobar
None of these
Explanation:
The correct answer to the question is: isotone
Q.
Which one of the following compound does not have – OH group___________________?
glycerol
ethylene glycol
ethyl acetate
picric acid
Explanation:
The correct answer to the question is: ethyl acetate
Q.
The halogen having highest electron affinity is_____________________?
Iodine
Bromine
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Chlorine
Q.
The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
PCI5
SOCl2 / Pyridine
PCI3
Zn / HCI
Explanation:
The correct answer to the question is: SOCl2 / Pyridine
Q.
The deliquescence is a property in which a solid____________________?
Loses water of crystallization
Absorbs moisture and turns to liquid form
Absorbs moisture and remains solid
Increases the number of water of crystallization
Explanation:
The correct answer to the question is: Absorbs moisture and turns to liquid form
Q.
The general formula for alkenes is:______________?
CnH2n-2
CnH2n+2
CnH2n+1
CnH2n
Explanation:
The correct answer to the question is: CnH2n
Q.
Oxalate ion behaves as a ________ ligand.
Bidentate
Unidentate
Hexadentate
Tridentate
Explanation:
The correct answer to the question is: Bidentate
Q.
Clemmensens reduction infolves the reduction of___________________?
ketone
aldehyde
all of the above
alkane
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following does not contain phosphorus ?
Bone
Yolk of egg
Steel
Nerves
Explanation:
The correct answer to the question is: Steel
Q.
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
Carbon= -1, Oxygen= +1
Carbon=0, Oxygen=0
Carbon= +1, Oxygen= -1
Carbon=0, Oxygen= -1
Explanation:
The correct answer to the question is: Carbon= -1, Oxygen= +1
Q.
For the generation of biogas, the materials commonly used are__________?
Forest residues
None of these
Animal wastes
Aquatic plants
Explanation:
The correct answer to the question is: Animal wastes
Q.
Electrolysis of dilute solution of NaCl results at the anode_______________?
oxygen
hydrogen
sodium
chlorine
Explanation:
The correct answer to the question is: oxygen
Q.
The Boiling Point of Ethyl Alcohol is_________?
56°C
58°C
78°C
73°C
Explanation:
The correct answer to the question is: 78°C
Q.
Nitrates of which pair of elements give different products on thermal decomposition ?
Mg Ca
Li Ca
Li Na
Na K
Explanation:
The correct answer to the question is: Li Na
Q.
Example of copolymers is _____________?
nylon 6-6
Polyethylene
Orlon
PVC
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
Oxygen tank
None of these
Nitrogen tank
Hydrogen tank
Explanation:
The correct answer to the question is: Oxygen tank
Q.
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
propanal
propanoic acid
propanol
propane
Explanation:
The correct answer to the question is: propanoic acid
Q.
Methanol can be obtained from_________________?
methane
water gas
all
destructive distillation of wood
Explanation:
The correct answer to the question is: all
Q.
An acid-Base Reaction is always a/an __________?
Endothermic
Fission
Fusion
Exothermic
Explanation:
The correct answer to the question is: Exothermic
Q.
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Graham’s Law
Charles’ Law
Boyle’s law
Avogadro’s Law
Explanation:
The correct answer to the question is: Charles’ Law
Q.
Arsenic oxides are removed by passing through_________________?
Sodium hydroxide
Ferric hydroxide
Aluminium hydroxide
Calcium hydroxide
Explanation:
The correct answer to the question is: Ferric hydroxide
Q.
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
dihydric alcohol
tertiary alcohol
primary alcohol
secondary alcohol
Explanation:
The correct answer to the question is: primary alcohol
Q.
Which compound is also known by the name of carbolic acid ?
C6H5OH
C2H2OH
H3PO3
H2CO3
Explanation:
The correct answer to the question is: C6H5OH
Q.
The blotting paper helps observe liquid by__________?
Boldness
Surface Action
Viscosity
Capillary Action
Explanation:
The correct answer to the question is: Capillary Action
Q.
Which group contains elements that exist as monoatomic molecule?
18
1
14
2
Explanation:
The correct answer to the question is: 18
Q.
The ether used in Wurtz synthesis is__________________?
dry
aqueous
acidic
basic
Explanation:
The correct answer to the question is: dry
Q.
Bosch Process involves _______?
Isomerization
Crackling
Oxidation
Reduction
Explanation:
The correct answer to the question is: Oxidation
Q.
Value of normal atmospheric pressure at sea level at 0°C is______?
76cm of Hg
1 atm
All of these
760 Torr
Explanation:
The correct answer to the question is: All of these
Q.
d-block elements are also called as __________?
Inner Transition
Alkali Metals
Both B & C
Outer Transition
Explanation:
The correct answer to the question is: Outer Transition
Q.
The carbon-carbon bond strength is maximum in__________?
Cyclohexane
CH3CH3
Benzene
CH2=CH2
Explanation:
The correct answer to the question is: CH3CH3
Q.
The criteria for aromaticity is presence of_________?
Presence of 4nπ electrons
Presence of 4n+2π electrons
Unsaturations
Cyclic structure
Explanation:
The correct answer to the question is: Presence of 4n+2π electrons
Q.
Which set of quantum numbers is not allowed?
n=2,l=0,m1=0,ms=-1/2
n=2,l=1,m1=0,ms=+1/2
n=2,l=1,m1=-1,ms=+1/2
n=2,l=2,m1=1,ms=-1/2
Explanation:
The correct answer to the question is: n=2,l=2,m1=1,ms=-1/2
Q.
Which of the following orbitals has maximum penetration effect?
P
f
d
S
Explanation:
The correct answer to the question is: S
Q.
Which one of the following species is not an electrophile ?
Br+
H+
NH3
BF3
Explanation:
The correct answer to the question is: NH3
Q.
Compounds of nitrogen and phosphorus are mostly________________?
all varieties are possible
polar
covalent
ionic
Explanation:
The correct answer to the question is: covalent
Q.
Which one of the following is not the use of graphite ?
Abrasive
Lead pencils
Electrode of electrolytic cell
Lubricant
Explanation:
The correct answer to the question is: Abrasive
Q.
Which one of the following acids is present in lemon juice ?
Oxalic acid
Benzoic acid
Tartaric acid
Citric acid
Explanation:
The correct answer to the question is: Citric acid
Q.
What is chemical symbol for Tungsten?
T
Tn
Z
W
Explanation:
The correct answer to the question is: W
Q.
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
Both A and B
none
steric hindrance
alkyl groups are electron donating
Explanation:
The correct answer to the question is: Both A and B
Q.
Shiff’s reagent gives pink color with ____________?
Acetone
Acetaldehyde
Acetic acid
Methyl acetate
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
Which of the following compounds is not soluble in HNO3___?
AgCl
PbS
CuS
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 __________?
None of These
Cracking
Reforming
Refining
Explanation:
The correct answer to the question is: Reforming
Q.
Actinides are the elements with atomic number from:
101 to 115
97 to 104
36 to 43
89 to 103
Explanation:
The correct answer to the question is: 89 to 103
Q.
Which one of the following compounds usually smells like garlic ?
All have same smell
H3PO3
P2O5
P2O3
Explanation:
The correct answer to the question is: P2O3
Q.
What is the molecular formula of Benzenetriozonide ?
C6H6O6
C6H5O9
C6H5O8
C6H6O9
Explanation:
The correct answer to the question is: C6H6O9
Q.
Addition of 2% gypsum in cement________________?
Triggers hydrolysis
all of the above
Triggers hydration
Prevents rapid hardening
Explanation:
The correct answer to the question is: Prevents rapid hardening
Q.
Neoprene is _______________?
Natural rubber
synthetic rubber
Vulcanized rubber
All of the above
Explanation:
The correct answer to the question is: synthetic rubber
Q.
SO3 is not absorbed in water directly because__________________?
Dilute acid is produced
All of above
Reaction is exothermic
It is insoluble in water
Explanation:
The correct answer to the question is: Reaction is exothermic
Q.
Sum of protons and neutrons in an atom gives off _________ ?
Mass number
Atomic number
Both A and B
Nucleon numbera
Explanation:
The correct answer to the question is: Both A and B
Q.
For the reaction 2HI ____________> H2+ I2
Kp ≤ kc
Kc > kp
Kp= kc
Kp > kc
Explanation:
The correct answer to the question is: Kp= kc
Q.
In SI base units, 1 Bq is equal to __________ ?
1.5 disintegration per second
1 disintegration per second
10 disintegration per second
0.01 disintegration per second
Explanation:
The correct answer to the question is: 1 disintegration per second
Q.
If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
The vapour pressure of the boiling liquid becomes greater than the external pressure
High energy molecules continuously leaving the surface of liquid
The forces of attractions become stronger
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?
Helium
Argon
Methane
Neon
Explanation:
The correct answer to the question is: Argon
Q.
Which is methyl cyanide_________________?
CH3CN
CH3NO2
CH3NH2
CH2 = CH – CN
Explanation:
The correct answer to the question is: CH3CN
Q.
Carboxylic acid on reduction with HI / phosphorous yields_________________?
alkane
ketones
aldehydes
alcohols
Explanation:
The correct answer to the question is: alkane
Q.
Cyclopentene is a _________?
Aliphatic
Aromatic
Alicyclic
None of These
Explanation:
The correct answer to the question is: Alicyclic
Q.
Atoms of all the elements always contain in nucleus:
Neutron
Neutron and electron
Proton and neutron
Proton
Explanation:
The correct answer to the question is: Proton
Q.
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
cyclohexane
cyclohexanol
1 – hexanol
n – hexane
Explanation:
The correct answer to the question is: cyclohexanol
Q.
Which of the following is known as absolute zero?
0C°
273K
273.16C°
-273.16C°
Explanation:
The correct answer to the question is: -273.16C°
Q.
Nitrate (NO3) ions are obtained by the process of __________?
Fermentation
Nitrification
None of these
Denitrification
Explanation:
The correct answer to the question is: Nitrification
Q.
Coinage metals are actually_________?
Alkali metals
Halogens
Alkaline earth metals
Transition metals
Explanation:
The correct answer to the question is: Transition metals
Q.
What is the chemical symbol of “Potassium”?
P
Pt
Po
K
Explanation:
The correct answer to the question is: K
Q.
Vulcanized rubber is an example of ______________?
semisynthetic polymers
Natural polymers
None of These
Synthetic polymers
Explanation:
The correct answer to the question is: semisynthetic polymers
Q.
The second nuclear weapons used in warfare over Nagasaki, Japan, contain energy equal about of TNT?
25 kilotons
1.5 kilotons
30 kilotons
20 kilotons
Explanation:
The correct answer to the question is: 20 kilotons
Q.
Process used to separate insoluble particles from liquids is ___________ ?
Sieving
Drying
Filtration
Extraction
Explanation:
The correct answer to the question is: Filtration
Q.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
Smaller electronegativity of alkali metals
De-excitation of electrons from higher energy levels to low energy level
Smaller ionic radius of these metals
Excitation of electrons from low energy levels to higher energy levels
Explanation:
The correct answer to the question is: De-excitation of electrons from higher energy levels to low energy level
Q.
Boron is non-netal whereas A1 is metal. It is due to_______________________?
Both A and B
Small size
High nuclear charge
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?
273 K
200°C
546 K
546 °C
Explanation:
The correct answer to the question is: 546 K
Q.
Oxygen and sulphur resemble in all except________________?
Electronic conviguration of valence shell electrons
Show allotropy
Polymeric
Show same oxidation state
Explanation:
The correct answer to the question is: Show same oxidation state
Q.
Phosphoric acid is a weak acid and its basicity is____________________?
1
2
3
zero
Explanation:
The correct answer to the question is: 3
Q.
Viscosity of a liquid________by increasing temperature?
Remains same
None
Decreases
Increases
Explanation:
The correct answer to the question is: Decreases
Q.
Presence of nitrogen in organic compounds is tested as__________?
Nitrogen gas
NO
NH3
CN‾
Explanation:
The correct answer to the question is: CN‾
Q.
Water molecule is________?
Angular
Triangular planer
V-shaped
Pyramidal
Explanation:
The correct answer to the question is: V-shaped
Q.
Which of the following method is used to separate Hydrogen gas from water Gas?
Palladium process
Cyber Twinkling process
Bosch Process
Steam 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
As, CD
Zn, Mn
Cd , Pb
Explanation:
The correct answer to the question is: Hg, Pb
Q.
The petrol having octane number 80 has ____________?
20% n- heptane + 80% n-octane
80% n-heptane + 20% n- octane
80% n- heptane + 20% iso-octane
20% n- heptane + 80% iso-octane
Explanation:
The correct answer to the question is: 20% n- heptane + 80% iso-octane
Q.
Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
CHCHCHO + CHCOOH
CHCHCOOH + CHCOOH
CHCOOH + CO
CHCHCHO + CHCHO
Explanation:
The correct answer to the question is: CHCHCOOH + CHCOOH
Q.
Carnalite has chemical formula__________________?
Na2B4O7.10H2O
KCI
CaCO3.MgCO3
KCI.MgCl2.6H2O
Explanation:
The correct answer to the question is: KCI.MgCl2.6H2O
Q.
Allotropic form of phosphorus that is poisonous is___________________?
Black
White
Red
Violet
Explanation:
The correct answer to the question is: White
Q.
Dry distillation of calcium acetate results in the formation of_________________?
methane
acetone
acetaldehyde
formaldehyde
Explanation:
The correct answer to the question is: acetone
Q.
The quality of petrol is improved by ____________?
Reforming
Cracking
Refining
Hydration
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
Propionaldehyde and Formaldehyde
Acetaldehyde only
Ethylene only
Explanation:
The correct answer to the question is: Propionaldehyde and Formaldehyde
Q.
Alkenes are produced from dehalogenation of________________?
trihalo alkane
vicinal dihalo alkane
vicinal trihalo alkane
dihalo alkane
Explanation:
The correct answer to the question is: vicinal dihalo alkane
Q.
The hybridization of nitrogen atom in pyridine is_______?
It is not hybridized
Sp2
Sp3
Sp
Explanation:
The correct answer to the question is: Sp2
Q.
Ammonia may be prepared by heating ammonium chloride with_______________?
Aqueous sodium hydroxide
NaCl
Water
H2SO4
Explanation:
The correct answer to the question is: Aqueous sodium hydroxide
Q.
The type of hybridisation of boron in diborane is______?
Sp2- hybridisation
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
C2H2
CH4
C2H6
Explanation:
The correct answer to the question is: CH4
Q.
What is the color of copper sulfate crystalline?
Green
Blue
Brown
White
Explanation:
The correct answer to the question is: Blue
Q.
Which of the following statements is incorrect about halogens ?
All the halogens react with noble gases to form their halides
All are non-metals
They have high electron attinity and ionization energy
All the halogens have electronic conviguration ns2p5
Explanation:
The correct answer to the question is: All the halogens react with noble gases to form their halides
Q.
The shielding Effect across the period __________?
None of them
Remains Same
Decreases
Increases
Explanation:
The correct answer to the question is: Remains Same
Q.
The pH of milk is_______?
9
12
6.5-7
8
Explanation:
The correct answer to the question is: 6.5-7
Q.
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
700⁰C
1300⁰C
500⁰C
900⁰C
Explanation:
The correct answer to the question is: 700⁰C
Q.
The number of moles are present in 9.5g of CS2?
1.5
0.125
0.25
None of These
Explanation:
The correct answer to the question is: 0.125
Q.
Which of the following has acidic hydrogen?
Ethyne
Ethene
Ethane
Benzene
Explanation:
The correct answer to the question is: Ethyne
Q.
Which of following is known as Blue Vitriol or Blue Stone?
K2CrO4
AgNO3
CuSO4.5H2O
K2Cr2O7
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
The given dissociation constant (Ka) value 1.3×10-10 is of_________________?
Alcohol
Water
Phenol
Acetic acid
Explanation:
The correct answer to the question is: Phenol
Q.
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
proteins and oild
fats and oils
all above
fats and proteins
Explanation:
The correct answer to the question is: fats and oils
Q.
Which of the following gases is used for welding?
Ethane
Acetylene
Methane
Ethene
Explanation:
The correct answer to the question is: Acetylene
Q.
Tetraethyl lead is used as______?
Fire Extinguisher
Mosquito Repellent
Pain Killer
Petrol Additive
Explanation:
The correct answer to the question is: Petrol Additive
Q.
Oobleck is the mixture of _________?
Gram Flour and Water
Cement and Water
Baking Soda and Vinegar
Cornstarch and Water
Explanation:
The correct answer to the question is: Cornstarch and Water
Q.
Which of the following represents the correct electronic configuration of VII A group elements in the ground state ?
ns2p2
ns2p4
ns2p5
ns2p6
Explanation:
The correct answer to the question is: ns2p5
Q.
The volume strength of 1.5 N H2O2 solution is_______?
8.8
8.4
4.8
5.2
Explanation:
The correct answer to the question is: 8.4
Q.
Aldehyde and ketone have same general formula for homologous series_________________?
CnH2nO
CnH2n
CnH2nO2n
CnH2nOn+1
Explanation:
The correct answer to the question is: CnH2nO
Q.
The anhydride of HCIO4 is_________________?
Cl2O
Cl2O6
ClO2
Cl2O7
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?
Anionic
Neutral
Cationic
Nonionic
Explanation:
The correct answer to the question is: Nonionic
Q.
Which of the following reactions may be assoclated with aldehyde and ketone ?
oxidation
all of the above
nucleophile addition
polymerization
Explanation:
The correct answer to the question is: all of the above
Q.
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?
3P
6P
P/3
3P/T
Explanation:
The correct answer to the question is: P/3
Q.
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
Sulphonides
Lime
Zeolites
Nitrates
Explanation:
The correct answer to the question is: Zeolites
Q.
Metal are highly ___________ ?
Electronegativity
Neutral
Both of these
Electropositive
Explanation:
The correct answer to the question is: Electropositive
Q.
The oxidation of secondary alcohol gives ?
carboxylic acid
alkane
Acetylene
ketone
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following is the most Viscous?
Honey
Water
Spirit
Glycerine
Explanation:
The correct answer to the question is: Honey
Q.
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
H2SO4
P2O5
PCI5
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Carbon,Diamond and Graphite are together called:___________?
Allotrope
Isomers
Isotopes
Isomorphs
Explanation:
The correct answer to the question is: Allotrope
Q.
Position of double bond in an organic compound is determined by ___________?
Hydrogenation
Reduction
Oxidation
Ozonolysis
Explanation:
The correct answer to the question is: Ozonolysis
Q.
Which is used for artificial ripening of fruit ?
ethyne
methane
ethane
ethene
Explanation:
The correct answer to the question is: ethene
Q.
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
N-hexane
Benzene sulphonic acid
acetylene
Sodium benzoate
Explanation:
The correct answer to the question is: N-hexane
Q.
The compound (CH3)3COH according to IUPAC is known as ___________?
1,1- Diethylethanol
Tert Alcohol
2,2-Dimethyl-propanol
Tert-Butanol
Explanation:
The correct answer to the question is: 2,2-Dimethyl-propanol
Q.
Which one of the following is a bridge element?
P
Be
K
Cl
Explanation:
The correct answer to the question is: Be
Q.
The main contributor to toxicity of detergent:
Na-Silicate solution
Na-sulphate solution
K-Chloride solution
Na-Chloride solution
Explanation:
The correct answer to the question is: Na-Silicate solution
Q.
In Periods from Left to right Electronegativity will: _________?
none of these
decrease
constant
increase
Explanation:
The correct answer to the question is: increase
Q.
Formula of Galena is________?
FeS2
HgS
AS2S3
PbS
Explanation:
The correct answer to the question is: PbS
Q.
Glycine is the name of an amino acid because___________________?
Shining appearance
Bitter taste
Sweet taste
Green colour
Explanation:
The correct answer to the question is: Sweet taste
Q.
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
Disproportionation reaction
Reduction reaction
Double displacement reaction
Displacement reaction
Explanation:
The correct answer to the question is: Disproportionation reaction
Q.
Which one of the following statement is correct for urea ?
it provides micronutrients to the plants
it is a synthetic fertilizer
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 ?
First
Zero
Third
Second
Explanation:
The correct answer to the question is: First
Q.
Reacting bromine with benzene in the presence of sunlight will result in_______________?
Addition reaction
The rupturing of benzene ring
Substitution reaction
No-reaction
Explanation:
The correct answer to the question is: Addition reaction
Q.
What is the molecular weight of Ammonia (NH3) ________ ?
19.031 g/mol
17.031 g/mol
27.033 g/mol
18.031 g/mol
Explanation:
The correct answer to the question is: 17.031 g/mol
Q.
Vinylacetylene combines with HCI to form___________________?
divinyl acetylene
benzene
polyacetylene
chloroprene
Explanation:
The correct answer to the question is: chloroprene
Q.
Ethene is the first member of __________?
Alkenes Family
Saturated hydrocarbon
Aromatic hydrocarbon
None of These
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 _________________?
hydrolysis
neutralization
saponification
esterification
Explanation:
The correct answer to the question is: esterification
Q.
Percentage of lead in lead pencil is________?
80
Zero
20
70
Explanation:
The correct answer to the question is: Zero
Q.
Indicate the correct statement__________________?
Cl2 is the strongest oxidizing agent
Cl2 is insoluble in water
I2 is a volatile solid
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__________________?
I2
Cl2
Br2
F2
Explanation:
The correct answer to the question is: F2
Q.
Acetal on acid hydrolysis generates__________________?
Alcohol
Ketone
None of the above
Both A & B
Explanation:
The correct answer to the question is: Both A & B
Q.
Air is a/an _________?
Compound
Mixture
Element
Electrolyte
Explanation:
The correct answer to the question is: Mixture
Q.
The valency of Carbon is _________?
3(Trivalent)
2(Divalent)
1(univalent)
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
-ve
Neutral
Explanation:
The correct answer to the question is: +ve
Q.
Reactivity due to pi-electrons is present in_________________?
alkyne
alkene
both B & C
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 ___________?
159.6kJ
110.5 KJ
135.5 KJ
80.4 KJ
Explanation:
The correct answer to the question is: 159.6kJ
Q.
When SO2 solution is passed over which of the following it turns green?
K2Cr2O7
H2SO4
P2O5
SO3
Explanation:
The correct answer to the question is: K2Cr2O7
Q.
50% inversion of configuration of molecules take place in a___________________?
E2 – reaction
SN1 – reaction
E1 – reaction
SN2 – reaction
Explanation:
The correct answer to the question is: SN1 – reaction
Q.
What is the molecular formula for Nitric acid ________ ?
HN2O2
HNO2
HNO3
H2NO4
Explanation:
The correct answer to the question is: HNO3
Q.
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
d-electrons in Fe(Z = 26)
s-electrons in Mg(Z = 12)
p-electrons in CI(Z = 17)
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_________________?
Remains unchanged
Lose water and remain solid
Gain water and remain solid
Gain water and become liquid
Explanation:
The correct answer to the question is: Lose water and remain solid
Q.
Which of the following gases shows more ideal behaviour at 0°C___________?
H2
CH4
He
NH3
Explanation:
The correct answer to the question is: He
Q.
Charle’s Law was given by Jacques Charles in_______?
1880
1885
1787
1785
Explanation:
The correct answer to the question is: 1787
Q.
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
Fe2O3+ 3CO——–> 2Fe+ 3CO2
CaO+ SiO2——> CaSiO3
FeSiO3———> FeSiO3
2FeS+3O2——–> 2Fe+ SO2
Explanation:
The correct answer to the question is: Fe2O3+ 3CO——–> 2Fe+ 3CO2
Q.
Which Oxide of Manganese is amphoteric?
MnO
MnO2
Mn2O7
Mn2O3
Explanation:
The correct answer to the question is: MnO2
Q.
Alum is used by dyers of cloth:
Softening of hard water
As mordant
As water purifier
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_______________?
Cathode to decay
Hydroxide ions to reach anode
Chlorine gas to mix
All of the above
Explanation:
The correct answer to the question is: Hydroxide ions to reach anode
Q.
Chromatography is used to separate _________ ?
Molecules
Mixtures
Atoms
Solution
Explanation:
The correct answer to the question is: Mixtures
Q.
What will be the PH of 0.01M ammonium chloride solution containing 10 mol per liter of ammonium chloride (pkb=4.76)?
7.24
6.24
5.24
8.24
Explanation:
The correct answer to the question is: 8.24
Q.
Which of the following is not a use of silicon ?
Antifreeze
Water repellent
Lubricants
Hydraulic brakes
Explanation:
The correct answer to the question is: Antifreeze
Q.
The absolute value of charge on electron was determined by ________ ?
Robert Millikan
Rutherford
Chadwick
J.J.Thomson
Explanation:
The correct answer to the question is: Robert Millikan
Q.
Calculate % of N in KNO3__________?
None of these
13.86%
14.34%
18.56%
Explanation:
The correct answer to the question is: 13.86%
Q.
Which of the following compounds will react with Tollens reagent ?
CH3-CO-CH2-CH3
CH3-COOH
CH3-CHO
CH3-CH-CH3
Explanation:
The correct answer to the question is: CH3-CHO
Q.
Tetrahydroborate ion is the source of_______________?
H-
both A & amp; B
H+
proton
Explanation:
The correct answer to the question is: H-
Q.
The molecular formula of Methane gas is___________?
CO
CH
NH
CH
Explanation:
The correct answer to the question is: CH
Q.
The Maximum mass of an atom is present in ___________?
Shell
Orbit
Nucleus
Energy levels
Explanation:
The correct answer to the question is: Nucleus
Q.
The octane number of zero is assigned to____________?
n-heptane
3-methyl octane
2-methyl octane
iso-octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Ethanol and methanol can be distinguished by a__________________?
Benedicts test
Iodoform test
Lucas test
Tollens test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Acidic amino acids have________________?
2 amino groups and 1 carboxylic group
1 amino and 1 carboxylic groups
2 carboxylic groups and 1 amino group
2 amino and 2 carboxylic groups
Explanation:
The correct answer to the question is: 2 carboxylic groups and 1 amino group
Q.
Petra means ______ ?
Fuel
Petrol
Rock
Sediment
Explanation:
The correct answer to the question is: Rock
Q.
Oxidation of primary alcohol gives________________?
Aldehyde
Alkene then – COOH
ketone
Ester
Explanation:
The correct answer to the question is: Aldehyde
Q.
Which one is not a nucleophile ?
H3C+
NH3
SCN-
C2H5O-
Explanation:
The correct answer to the question is: H3C+
Q.
The PH of the 1.3 × 10-4 NH4Cl is__________?
3.886
1.3
4.0
2.886
Explanation:
The correct answer to the question is: 3.886
Q.
Example of cross linked polymer is ____________?
Polyester
Nylon
PVC
bakelite
Explanation:
The correct answer to the question is: bakelite
Q.
The best indicator for titrating HCl with NH4OH is: _________?
phenopthalein
litmus
phenol red
methyl Orange
Explanation:
The correct answer to the question is: methyl Orange
Q.
Oxygen does not react with all except_________________?
Acid
Metals
Alkali
Water
Explanation:
The correct answer to the question is: Metals
Q.
Which of the following is more Basic in nature?
3° Alkyl ammine
1°Alkyl ammine
2° 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 _________?
CH4
CO2
C2H4
Xe
Explanation:
The correct answer to the question is: CO2
Q.
The element of group VIA which is a non-metal is________________?
Po
Te
Se
S
Explanation:
The correct answer to the question is: S
Q.
Which of the following is metasilicic acid ?
H2SnO3
H2SiO3
H3SbO4
H3AsO4
Explanation:
The correct answer to the question is: H2SiO3
Q.
Second ionization potential of alkali metals are very high due to_______________?
being metals
inert gas configurations
being s-block elements
ns1 electronic configuration
Explanation:
The correct answer to the question is: inert gas configurations
Q.
The structure of H2O2 is_______?
Spherical
Planar
Linear
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 ?
I2O4
I2O5
I4O2
All are equally useful
Explanation:
The correct answer to the question is: I2O5
Q.
Cannizzaros reaction is not given by__________________?
trimethyl acetaldehyde
acetaldehyde
benzaldehyde
formaldehyde
Explanation:
The correct answer to the question is: acetaldehyde
Q.
Which is the strongest acid ?
HCIO2
HCIO
HCIO4
HCIO3
Explanation:
The correct answer to the question is: HCIO4
Q.
In a group, atomic radii increase due to successive increase of _________ ?
Nucleus
Electronic shells
Proton shells
Neutron 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?
5
3
2
4
Explanation:
The correct answer to the question is: 3
Q.
Which electronic configuration corresponds to an element of group IIIA ?
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6 3s2 3p6 4s2 3d1
1s2 2s2 2p4
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_________________?
Citric acid
Acetic acid
Butanoic acid
Formic acid
Explanation:
The correct answer to the question is: Acetic acid
Q.
Atomic mass of an atom is present in the __________?
Nucleus
Orbit
Shell
Orbital
Explanation:
The correct answer to the question is: Nucleus
Q.
Evaporation is_____________?
Surface Process
All of these.
Endothermic Reaction
Continuous Process
Explanation:
The correct answer to the question is: All of these.
Q.
Ketones and aldehydes can be distinguished using ____________?
Bendict solution
None of These
Tollens reagent
Fehling solution
Explanation:
The correct answer to the question is: Tollens reagent
Q.
What is the chemical name of Oil of Vitriol?
Sulphuric Acid
Hydrochloric Acid
Muriatic Acid
Nitric Acid
Explanation:
The correct answer to the question is: Sulphuric Acid
Q.
Ostwald’s dilution law applicable to:
Weak electrolytes
Strong electrolytes
Non electrolytes
All electrolytes
Explanation:
The correct answer to the question is: Weak electrolytes
Q.
The PH of pure water at 25°C, kw=1×10-4____________?
7
None of above
14
Explanation:
The correct answer to the question is: 7
Q.
The Substance which resist in change in PH is called?
Osmosis
Neutralization
Buffer
Active transport
Explanation:
The correct answer to the question is: Buffer
Q.
In borax bead test which compound is formed_________?
Double oxide
Ortho burate
Meta borate
Tetra borate
Explanation:
The correct answer to the question is: Meta borate
Q.
Molecular orbital Theory is also called_________?
Band theory
π and σ bonding theory
Antibondingtheory
Bonding theory
Explanation:
The correct answer to the question is: Antibondingtheory
Q.
In which compound of Xenon the oxidation state of Xenon is + 6?
Na4XeO6
XeOF2
XeF4
XeOF4
Explanation:
The correct answer to the question is: XeOF4
Q.
The discovery of neutron became very late because _______ ?
It does not move
It is present in nucleus
It is a fundamental particle
It does not carry any charge
Explanation:
The correct answer to the question is: It does not carry any charge
Q.
Which of the following phenomenon is considered responsible for Global Warming?
Greenhouse effect
Monsoon
Fire in coal mines
Dry farming
Explanation:
The correct answer to the question is: Greenhouse effect
Q.
Stainless steel contains___________?
Fe+ Cr+Cu
Fe+Cr+Ni
Cu+C+Ni
Fe+Ni+Cu
Explanation:
The correct answer to the question is: Fe+Cr+Ni
Q.
The heaviest subatomic particle among the following is_________?
Electron
Proton
Neutron
All have mass
Explanation:
The correct answer to the question is: Neutron
Q.
The whole universe is made up of almost _______of Hydrogen?
60%
80%
70%
50%
Explanation:
The correct answer to the question is: 70%
Q.
Ethyl chloride with nascent hydrogen produces_________________?
ethane
propane
methane
butane
Explanation:
The correct answer to the question is: ethane
Q.
Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?
Both at same time
None of them
Carbon Monoxide Gas
Hydrogen Gas
Explanation:
The correct answer to the question is: None of them
Q.
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Dr.A.Walash
S.E.Manhan
Einstein
Schwartz
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
Steel tubes used
Both a & b
Explanation:
The correct answer to the question is: Steel tubes used
Q.
The compound C3H4 has a triple bond, which is indicated by its reaction with____________?
Bromine water
Bayer’s reagent
Fehling solution
Ammonical silver nitrate
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
Law of mass action was proposed by Goldberg and Peter Waage in _________?
1866
1888
1864
None of These
Explanation:
The correct answer to the question is: 1864
Q.
Quality of petrol is measured by___________?
Reforming
Refining
Heptane number
octane number
Explanation:
The correct answer to the question is: octane number
Q.
Greater the heat of neutralization the acid will be____________?
None of the above
More weaker
Not related to acid strength
more stronger
Explanation:
The correct answer to the question is: more stronger
Q.
The mass of 3.2 moles of ammonia (NH3) gas?
54.4 grams
55.4 grams
53.4 grams
56.4 grams
Explanation:
The correct answer to the question is: 54.4 grams
Q.
I3( Tri-iodine) has shape_________?
Linear
Square bipyramidal
Both A and C
Trigonal bipyramidal
Explanation:
The correct answer to the question is: Linear
Q.
Which one of the following alcohol has greater boiling point___________________?
glycerol
methanol
ethanol
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
Condensation
Polymerization
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
They are found in earth
Their oxides are basic
Explanation:
The correct answer to the question is: Both A & B
Q.
The reciprocal of the coefficent of viscosity is called__________?
Density
Absorbance
Fluidity
Specific gravity
Explanation:
The correct answer to the question is: Fluidity
Q.
Carbon in wrought iron is present as_________?
Iron carbide
Partly as iron carbide and partly as graphite
Silicon carbide
Graphite
Explanation:
The correct answer to the question is: Iron carbide
Q.
Which alkyl halide has the highest reactivity for a particular alkyl group ?
R-F
R-C
R-I
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.
He+¹
H
Li+²
Be+³
Explanation:
The correct answer to the question is: Be+³
Q.
The reaction of Lucas reagent is the fastest with_________?
CH3CH2OH
(CH3)3COH
CH3(CH2)OH
(CH3)2CHOH
Explanation:
The correct answer to the question is: (CH3)3COH
Q.
The process by which a substance absorbs moisture upon exposure to atmosphere is called?
Efflorescence
Deliquescence
Dehydrogenation
Desalination
Explanation:
The correct answer to the question is: Deliquescence
Q.
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
C3H6
C4H8
C2H4
C5H10
Explanation:
The correct answer to the question is: C4H8
Q.
Z number for chlorine is __________?
21
35.5
17
Explanation:
The correct answer to the question is: 17
Q.
Hydrocarbon is formed when Grignard reagent is treated with___________?
Both a and b
H2O
None of the above
CH3OH
Explanation:
The correct answer to the question is: H2O
Q.
Substance which is found in dried up lakes of Tibet and California is_______________?
Tincal
Colemanite
Boric acid
Calcium carbonate
Explanation:
The correct answer to the question is: Tincal
Q.
Electronic Configuration of Calcium (Ca) atom may be written as________?
Kr,4p2
Ne, 4p2
Ne, 4s2
Ar, 4s2
Explanation:
The correct answer to the question is: Ar, 4s2
Q.
Which of the following will decompose to produce litharge_________________?
Pb3O4
All of the above
Pb2O
PbO2
Explanation:
The correct answer to the question is: Pb3O4
Q.
The phenomenon of negative catalysis is also known as:
auto catalysis
inhibition
Enzyme catalysis
Self catalysis
Explanation:
The correct answer to the question is: inhibition
Q.
Which of the following is not a use of formaldehyde ?
in making acetic acid
in making throat lozenges
in making medicine urotropine
in silvery mirror
Explanation:
The correct answer to the question is: in making acetic acid
Q.
Upto ___________________ C atoms alkanes are gases?
2
6
3
4
Explanation:
The correct answer to the question is: 4
Q.
When the radiation of light is passed through a prism, it undergoes __________?
interference
reflection
refraction
diffraction
Explanation:
The correct answer to the question is: refraction
Q.
What is the mass percent of silver in silver notrate, AgNO3?
63.5%
64.5%
61.5%
65.6%
Explanation:
The correct answer to the question is: 63.5%
Q.
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
CH
SO
CH
SO
Explanation:
The correct answer to the question is: SO
Q.
Nucleus of an atom was discovered by___________?
James Chadwick
J J Thomson
Rutherford
Goldstein
Explanation:
The correct answer to the question is: Rutherford
Q.
Urea as a fertilizer contains:____________?
53% N
57% N
73% N
46% N
Explanation:
The correct answer to the question is: 46% N
Q.
Introduction of nitro group in a molecule is called___________________?
amination
halogenation
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
Cu
Al
Zn
Explanation:
The correct answer to the question is: C
Q.
The molar mass of an organic acids is determined by____________?
Volumetric method
Osmosis method
Depression of freezing point
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 a nucleophilic carbon & a good leaving group
they have an electrophilic carbon
they have an electrophilic carbon & a good leaving group
Explanation:
The correct answer to the question is: they have an electrophilic carbon & a good leaving group
Q.
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
89%
75%
81%
73%
Explanation:
The correct answer to the question is: 73%
Q.
Methyl alcohol on oxidation with acidified K2Cr2O7 gives__________?
CH3COOH
CH3CHO
CH3COCH3
HCOOH
Explanation:
The correct answer to the question is: HCOOH
Q.
Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C.
27%
26%
<2.6%
37%
Explanation:
The correct answer to the question is: 37%
Q.
Tincal is a mineral of___________________?
Si
A1
B
C
Explanation:
The correct answer to the question is: B
Q.
Which ion will have maximum value of heat of hydration ?
Ba+
A1+3
Cs+
Mg+2
Explanation:
The correct answer to the question is: A1+3
Q.
Which is artificial manmade fiber?
Boron
Rayon
None of these
Saffron
Explanation:
The correct answer to the question is: Rayon
Q.
Acetylene gives:
White precipitate with both the reagents
Red precipitate with both the reagents
White precipitate with CuCl and red precipitate with AgNO
White precipitate with AgNO and red precipitate with CuCl
Explanation:
The correct answer to the question is: White precipitate with AgNO and red precipitate with CuCl
Q.
Alkanes are also known as________________?
unsaturated hydrocarbon
paraffins
saturated hydrocarbon
both A & C
Explanation:
The correct answer to the question is: paraffins
Q.
Which element is necessary for normal leaf development ?
Ba
Mg
Ca
Si
Explanation:
The correct answer to the question is: Ca
Q.
Isotopes differs in______________________?
arrangement of electrons in orbitals
chemical properties
properties depend upon mass
position in the periodic table
Explanation:
The correct answer to the question is: properties depend upon mass
Q.
Poisonous gas present in the exhaust fumes of a jet plane is__________?
C2H2
Flurocarbon
Methane
Carbon monoxide
Explanation:
The correct answer to the question is: Carbon monoxide
Q.
Example of ‘globular’ proteins is __________ ?
Primary protein
Secondary proteins
Enzymes
Peptide
Explanation:
The correct answer to the question is: Enzymes
Q.
The heat energy produced when the human body metabolises 1 gram of fat is__________?
29 KJ
30 KJ
1 KJ
39 KJ
Explanation:
The correct answer to the question is: 39 KJ
Q.
The chemical symbol for silver is __________?
Ag
Sv
Au
At
Explanation:
The correct answer to the question is: Ag
Q.
The process in which no heat enters or leave the system known as _____________?
adiabatic
Isothermal
Isochoric
Isobaric
Explanation:
The correct answer to the question is: adiabatic
Q.
Hookworm is a parasitic worm that infects ______?
lungs
small intestine
large intestine
liver
Explanation:
The correct answer to the question is: small intestine
Q.
In isothermal process?
temperature of the system remains constant
No heat enter or leave the system
Pressure of the system remains constant
Volume of the system remains unchanged
Explanation:
The correct answer to the question is: temperature of the system remains constant
Q.
Electric bulb filament is made of__________?
Aluminum
Tungsten
Lead
Copper
Explanation:
The correct answer to the question is: Tungsten
Q.
Argon gas was discovered by_______?
Rayleigh
Ramsay
Dalton
Lockerey
Explanation:
The correct answer to the question is: Ramsay
Q.
Which statement is incorrect ?
All the metals are good conductor of electricity
All the metals form positive ions
All the metals form acidic oxides
All the metals are good conductor of heat
Explanation:
The correct answer to the question is: All the metals form acidic oxides
Q.
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
methane
methanol
carbonic acid
methanol
Explanation:
The correct answer to the question is: methanol
Q.
Ozonolysis of acetylene gives:
Glycol
Glyoxal then formic acid
None
Formaldehyde
Explanation:
The correct answer to the question is: Glyoxal then formic acid
Q.
Ethylene diammine is ligand________?
Poly dentate
Bi dentate
mono dentate
tri dentate
Explanation:
The correct answer to the question is: Bi dentate
Q.
The PH of Tears is __________?
8.2
7.8
7.0
7.4
Explanation:
The correct answer to the question is: 7.4
Q.
The substance used in cancer therapy is___________?
Fe
Co
Ni
Rn
Explanation:
The correct answer to the question is: Co
Q.
Boric acid cannot be used__________________?
As antiseptic in medicine
For enamel and glazes
For washing eyes
In soda bottles
Explanation:
The correct answer to the question is: In soda bottles
Q.
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Glyoxal
Benzaldehyde
Glyoxime
Glycol
Explanation:
The correct answer to the question is: Glyoxal
Q.
Strong Nucleophile in polar aprotic solvent?
Iodide ion
Chloride ion
Flouride ion
Bromide ion
Explanation:
The correct answer to the question is: Flouride ion
Q.
The salt that gives the aqueous solution with pH less than 7, is called as____________?
Basic salt
Neutral salt
Acidic salt
Amphoteric salt
Explanation:
The correct answer to the question is: Acidic salt
Q.
Which one of the following is also known as tartaric acid ?
2 3 -dihydroxy butanioc acid
2 3 -dihydroxy butanedioic acid
2 2 -dihydroxy butanoic acid
2 3-dihydroxy butance 1 4 -dioic acid
Explanation:
The correct answer to the question is: 2 3-dihydroxy butance 1 4 -dioic acid
Q.
The law of traids is applicable to__________?
F, Cl, Br
Li, Be, B
Na, K, Rb
Cl, Br, I
Explanation:
The correct answer to the question is: Cl, Br, I
Q.
Actinides are the elements with atomic numbers from __________?
89 to 103
36 to 43
101 to 115
97 to 104
Explanation:
The correct answer to the question is: 89 to 103
Q.
Marsh gas is _________?
Methane
Hydrogen
Ethane
Nitrogen
Explanation:
The correct answer to the question is: Methane
Q.
Transition elements, in general, exhibit the following properties, except one. Name that property?
Formation of alloys
Tendency to form complexes
Variable oxidation state
Natural Radioactivity
Explanation:
The correct answer to the question is: Natural Radioactivity
Q.
Which one of the followings possesses melting point below 0°C?
Phosphorus
Bismuth
Carbon
Nitrogen
Explanation:
The correct answer to the question is: Nitrogen
Q.
Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
nucleophilic addition
nucleophilic substitution
electrophilic substitution
electronphilic addition
Explanation:
The correct answer to the question is: nucleophilic addition
Q.
An alcohol produced during the formation of a soap process.
Butanol
Glycerol
Ethylene glycol
Ethanol
Explanation:
The correct answer to the question is: Glycerol
Q.
The quantity of petrol can be increased by ___________?
Refining
Reforming
Cracking
Induction fueling
Explanation:
The correct answer to the question is: Cracking
Q.
The oxidation of isopropyl alcohol will yield___________________?
propane
Propanol
Propanoic acid
Propanone
Explanation:
The correct answer to the question is: Propanone
Q.
Which of the following is not an amino acids_____________________?
glycine
glumatic acid
aspartic acids
lactic acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
PbCl2
PdCl2
Cu2Cl2
CuCl2
Explanation:
The correct answer to the question is: CuCl2
Q.
Species are formed in one step of reaction mechanism and used up in another step are called:
inhibitor
Catalyst
activated complex
Intermediate
Explanation:
The correct answer to the question is: Intermediate
Q.
The composition of ‘ Golden spangles is_________?
BaCrO4
As2Cr2O7
PbI2
PbCrO4
Explanation:
The correct answer to the question is: PbCrO4
Q.
Which one of the following radiation has the longer wavelength?
infra red
ultra violet
visible
x-ray
Explanation:
The correct answer to the question is: infra red
Q.
Barret esophagus is good example of__________?
Atrophy
Metaplasia
Dysplasia
Hypertrophy
Explanation:
The correct answer to the question is: Metaplasia
Q.
Which one is least ionic in nature and decompose on heating ?
NaOH
LiOH
CsOH
KOH
Explanation:
The correct answer to the question is: LiOH
Q.
The molecular formula of Glucose is____________?
CH
NH
CHO
CHO
Explanation:
The correct answer to the question is: CHO
Q.
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
Angle strain
Torsional strain
Steric strain
Orbital strain
Explanation:
The correct answer to the question is: Steric strain
Q.
diamond got brilliance due to following reason?
reflection
dispersion
all of the above
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?
None
Sublimation
Decantation
Evaporation
Explanation:
The correct answer to the question is: Sublimation
Q.
Surface water contains:_____________?
Organic matter
only salt
Salt & Organic matter
Suspended impurity
Explanation:
The correct answer to the question is: Salt & Organic matter
Q.
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
Mother liquor
Filterate
Molasses
Extract
Explanation:
The correct answer to the question is: Molasses
Q.
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
Cone. HCI and anhydrous CaCl2
Cone. HCI and anhydrous SOCl2
Cone. HCI and anhydrous PCl2
Cone. HCI and anhydrous ZnCl2
Explanation:
The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Q.
The by-product of the process of Saponification is___________?
Sodium hydroxide
Glycerol
Glycol
Methanol
Explanation:
The correct answer to the question is: Glycerol
Q.
What is the color of precipitates of AgI?
Blue
Light Yellow
Yellow
Brown
Explanation:
The correct answer to the question is: Yellow
Q.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
0.2 moles
0.5 moles
0.4 moles
0.3 moles
Explanation:
The correct answer to the question is: 0.2 moles
Q.
Aldehydes and ketones both, show the type of Isomerism is __________?
Functional Group Isomerism
Metamerism
chain Isomerism
Position Isomerism
Explanation:
The correct answer to the question is: Functional Group Isomerism
Q.
Cations possess __________ charge?
None
Neutral
+ve
-ve
Explanation:
The correct answer to the question is: +ve
Q.
By which method the molecular mass of benzene was determined as 78.108 ?
Vapour density method
Specific gravity method
Distillation methos
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?
carbon is non-metal while silicon is semi-metal
Silicon has all sigma bonds
CO2 forms multiple bond while silicon does not form multiple bonds
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 reacts with fats to form soap
It reacts with chlorine gas
It is used in soda water
It corrodes the organic tissues
Explanation:
The correct answer to the question is: It corrodes the organic tissues
Q.
The rectified spirit contains________________?
95% alcohol
100% alcohol
90% alcohol
12% alcohol
Explanation:
The correct answer to the question is: 95% alcohol
Q.
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
Three
Two
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 ?
Deuterium dating
Carbon dating
Uranium dating
Radium dating
Explanation:
The correct answer to the question is: Carbon dating
Q.
Which of the following is the Radioactive isotope of Hydrogen?
Nichromium
Tritium
Deuterium
Protium
Explanation:
The correct answer to the question is: Tritium
Q.
The radiations with negative charge are________.
Beta radiations
Gamma radiations
positron
Alpha radiations
Explanation:
The correct answer to the question is: Beta radiations
Q.
Bleaching powder is an example of________________?
Double salt
Normal salt
Complex
Mixed salt
Explanation:
The correct answer to the question is: Mixed salt
Q.
What is the color of precipitates of AgBr?
Light green
Light yellow
Light Blue
Light brown
Explanation:
The correct answer to the question is: Light yellow
Q.
P2O5 is a hygroscopic powder which sublimes at______________?
360°C
260°C
630°C
620°C
Explanation:
The correct answer to the question is: 360°C
Q.
The IUPAC name of ethylene oxide is__________?
Oxoethene
Epoxy methane
Methoxymethane
Oxirane
Explanation:
The correct answer to the question is: Oxoethene
Q.
The concept of telluric helix was developed by___________?
Lother Meyer
A.E de Chancourtois
Newland
Dobereiner
Explanation:
The correct answer to the question is: A.E de Chancourtois
Q.
The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:
45g
40g
43.6g
41.4g
Explanation:
The correct answer to the question is: 43.6g
Q.
What catalyst is employed when benzene is prepared from acetylene at 70°C?
Raney nickel
Organo-nickel
Ni 250 – 300°C
Cr2O3 + A2O3 + SiO2
Explanation:
The correct answer to the question is: Organo-nickel
Q.
Milk tastes sour when kept in the open for sometime due to the formation of __________?
acetic acid
citric acid
carbonic acid
lactic acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Alpha particles can be detected by using___________?
Gold foils
Zinc sulphide screen
Barium sulphate
Thin Aluminium sheet
Explanation:
The correct answer to the question is: Zinc sulphide screen
Q.
The equation that represents the relationship of Faraday’s first law of electrolysis is _______?
w=Z/At
w=ZAt
Z=At
Z= At/M
Explanation:
The correct answer to the question is: w=ZAt
Q.
The subatomic particle that has negative charge is___________?
Proton
None of These
Electron
Neutron
Explanation:
The correct answer to the question is: Electron
Q.
The reaction of C2H5OH with conc. H2SO4 does not give_________?
Diethyl ether
Ethene
Ethyl hydrogen sulphate
Acetylene
Explanation:
The correct answer to the question is: Acetylene
Q.
Following are the anions of soap which form Ca and Mg ions which we see as curd in water
Sodium octadecanoate
Sodium hexadecanoate
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__________?
3.2
4.0
2.198
1.0
Explanation:
The correct answer to the question is: 3.2
Q.
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
e
3e
4e
2e
Explanation:
The correct answer to the question is: 2e
Q.
Polyamides are synthetic polymers commonly known as___________?
Protein
synthetic
Nylon
Cellulose
Explanation:
The correct answer to the question is: Nylon
Q.
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
Five
Three
Four
Two
Explanation:
The correct answer to the question is: Three
Q.
The distribution coefficient is related to:______________?
Colouring factors
retardation factors
Separating factors
decreasing factors
Explanation:
The correct answer to the question is: Separating factors
Q.
In Aldehydes and Ketones, carbon of carbonyl group is ____________?
Unhybridised
sp hybridised
sp hybridised
sp hybridised
Explanation:
The correct answer to the question is: sp hybridised
Q.
Formula of Chile saltpetre is__________________?
NH4Cl
NaNO3
CaCO3
Ba (NO3)2
Explanation:
The correct answer to the question is: NaNO3
Q.
Which of the following is the most reactive_________________?
benzene
ethane
ethyne
ethene
Explanation:
The correct answer to the question is: ethene
Q.
Where does the oxygen that keeps us alive come from?
Water
Oxides of minerals
Carbonates absorbed from soil
Carbon dioxide
Explanation:
The correct answer to the question is: Water
Q.
Which is the paramagnetic oxide of chlorine ?
ClO2
Cl2O7
Cl2O6
all
Explanation:
The correct answer to the question is: ClO2
Q.
Grignard reagent is reactive due to___________________?
the presence of halogen atom
all
the presence of magnesium atom
the polarity of C-Mg bond
Explanation:
The correct answer to the question is: the polarity of C-Mg bond
Q.
Real gases show ideal behavior at_______?
High Temp & High pressure
Low Temp & High Pressure
High Temp & Low Pressure
Low 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
6.5gm
0.065gm
Explanation:
The correct answer to the question is: 7.5gm
Q.
Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
aldomint
formalactose
formamint
lactomint
Explanation:
The correct answer to the question is: formamint
Q.
Solvent used in separation of biomolecules is _______________?
Alcohol
Ether
Acetone
Trichloroacetic acid
Explanation:
The correct answer to the question is: Trichloroacetic acid
Q.
The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
CO²+O²
Laughing Gas
CO+H²(water gas)
CO³+H²O
Explanation:
The correct answer to the question is: CO+H²(water gas)
Q.
Lactic acid on oxidation by alkaline potassium permanganate gives:____________?
Cinnamic acid
Tartaric acid
Propionic acid
Pyruvic acid
Explanation:
The correct answer to the question is: Pyruvic acid
Q.
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
Toluene
n-propyl benzene
Ethyl benzene
All
Explanation:
The correct answer to the question is: All
Q.
Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?
CH3COOH
K2MnO4
CuSO4
AgNO3
Explanation:
The correct answer to the question is: AgNO3
Q.
The rate of formation of ozone depends on the flux of:
visible radiation
Ultra violet radiation
Infrared radiation
Gamma rays
Explanation:
The correct answer to the question is: Ultra violet radiation
Q.
In water, Hydrogen is present ________by mass.
22%
31.13%
11.11%
15.15%
Explanation:
The correct answer to the question is: 11.11%
Q.
Polyvinyl acetate is the Polymer of __________?
Methyl methacrylate
Formaldehyde
Vinyl Chloride
Vinyl acetate
Explanation:
The correct answer to the question is: Vinyl acetate
Q.
Formaldehyde on condensation in the presence of calcium hydroxide: ______________?
Xylose
Fructose
Maltose
Formose
Explanation:
The correct answer to the question is: Formose
Q.
Amino acids are a product of the digestion of: ___________?
Vitamins
Carbohydrates
Proteins
Fats
Explanation:
The correct answer to the question is: Proteins
Q.
O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
Ethyl alcohol
Ethylene glycol
HCHO
Ethylene oxide
Explanation:
The correct answer to the question is: HCHO
Q.
In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
two
three
four
one
Explanation:
The correct answer to the question is: one
Q.
Which instrument is used to measure the viscosity.?
Viscometer
Hygrometer
Anemometer
Hydrometer
Explanation:
The correct answer to the question is: Viscometer
Q.
For which mechanisms the first step involved is the same ?
E1 and SN1
E2 + SN2
SN1 and SN2
E1 + E2
Explanation:
The correct answer to the question is: E1 and SN1
Q.
In whole Periodic Table which element Is Most Reducing Agent ?
lithium
Neon
Chlorine
Helium
Explanation:
The correct answer to the question is: lithium
Q.
An alcohol which can be prepared by fermentation is_________________?
C3H7OH
CH3 – CH2 – OH
C6H5OH
CH3OH
Explanation:
The correct answer to the question is: CH3 – CH2 – OH
Q.
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
yellow
pink
brick red
black
Explanation:
The correct answer to the question is: brick red
Q.
Which of the following statements is false about transition metals?
They show variable valency
All transition metal compounds are paramagnetic
They form complexes
They form coloured ions
Explanation:
The correct answer to the question is: All transition metal compounds are paramagnetic
Q.
Which one of following amino acid is neither acidic nor a basic in nature ?
Lysine
Histidine
Proline
Glutamic acid
Explanation:
The correct answer to the question is: Proline
Q.
Which of the following will have the highest boiling point ?
propanal
hexanone
ethanal
methanol
Explanation:
The correct answer to the question is: hexanone
Q.
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
2.05 gram
3.05 gram
5.05 gram
4.05 gram
Explanation:
The correct answer to the question is: 3.05 gram
Q.
Which one of the following is most acidic?
Phenol
O-nitrophenol
P-nitrophenol
M-nitrophenol
Explanation:
The correct answer to the question is: P-nitrophenol
Q.
The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
1-5Kg
1-2Kg
1-4Kg
1-3Kg
Explanation:
The correct answer to the question is: 1-2Kg
Q.
The average salinity of sea water is________?
3%
3.5%
2%
2.5%
Explanation:
The correct answer to the question is: 3.5%
Q.
Which element can form tripositive ion ?
Carbon
Silicon
Beryllium
Aluminium
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________________?
Br2
F2
I2
Cl2
Explanation:
The correct answer to the question is: F2
Q.
Dimethyl ketones are usually characterized through_____________?
Schiff’s test
Benedict’s reagent
Iodoform test
Tollen’s reagent
Explanation:
The correct answer to the question is: Iodoform test
Q.
Which molecule have stronger London dispersion forces?
Hydrogen gas
Hydrochloric acid
Water
Bromine
Explanation:
The correct answer to the question is: Water
Q.
The IUPAC name of pyridines is__________?
Diazine
Azolo
Azolidins
Azine
Explanation:
The correct answer to the question is: Azine
Q.
The organic compound used as antiknock agent in petroleum is____________?
TNT
(CH )Pb
CH MgBr
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 >Fe>Ni
Fe>Co> Ni
Ni> Co> Fe
Co > Ni > Fe
Explanation:
The correct answer to the question is: Co > Ni > Fe
Q.
The Chemical Formula of Sand is___________?
Sr2O
SiO2
Al2O3
Si2O3
Explanation:
The correct answer to the question is: SiO2
Q.
Generally the limit of visible spectrum is__________?
3800 to 7600 A°
1000 to 300 A°
12,000 to 15,000 A°
8000 to 10,000 A°
Explanation:
The correct answer to the question is: 3800 to 7600 A°
Q.
Which gas is used for artificial ripening of green fruit ?
Acetylene
Ethane
Carbon dioxide
Ethylene
Explanation:
The correct answer to the question is: Ethylene
Q.
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
Nylon 66
urotropine
Bakelite
Aniline formaldehyde plastic
Explanation:
The correct answer to the question is: Bakelite
Q.
Which of the following can be separated by ” Sublimation Method”?
None
Both A & B
Sand and Iron Filing
Sand and Naphthalene
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 nucleophile
the concentration of substrate
Explanation:
The correct answer to the question is: the concentration of substrate
Q.
The maximum mass is present in 1dm3 for the following gas at STP.
CO
CH
CS
CO
Explanation:
The correct answer to the question is: CS
Q.
A gas was found to have a density of 0.0847g/L at 17°C and a pressure of 760 torr. The gas must be?
None of These
CH4
He
N2
Explanation:
The correct answer to the question is: He
Q.
Acetophenone is a_____________________?
Ether
Aldehyde
Ketone
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 3p6 4s23d5
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p5 3d10
1s2 2s2 2p6 3s2 3p6 4s2 4p5
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p6 4s23d5
Q.
All members of homologous series have different __________?
physical properties
all of them
chemical properties
functional group
Explanation:
The correct answer to the question is: physical properties
Q.
Heating phenol with Zn will yield_________________?
Cyclohexane
Phenoxide
Benzoic acid
Benzene
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_________?
First we balance Metal than non-metal than Hydrogen than Oxygen.
according to atom’s atomic number.
None of the above
According to atom’s atomic mass.
Explanation:
The correct answer to the question is: First we balance Metal than non-metal than Hydrogen than Oxygen.
Q.
Hyperconjugation is also known as ____________?
Reasonable
no bond reasonable
Inductive effect
Electromeric effect
Explanation:
The correct answer to the question is: no bond reasonable
Q.
The one mole of _____molecule has the highest number of atoms?
HSO
HCO
HClO
O
Explanation:
The correct answer to the question is: HCO
Q.
On oxidation, an alcohol gives an aldehyde having same number of carbon atoms as in alcohol, the alcohol is____
None of These
Tertiary alcohol
Primary Alcohol
Secondary Alcohol
Explanation:
The correct answer to the question is: Primary Alcohol
Q.
Incomplete oxidation of methane in the limited supply of air forms ?
CO + H2 + C
CO2 and H2O
CH3OH
CO + H2O + C
Explanation:
The correct answer to the question is: CH3OH
Q.
The only non metal exists in liquid state is ___________?
Iodine
Mercury
Phosphorus
Bromine
Explanation:
The correct answer to the question is: Bromine
Q.
A brivalent metal has the equivalent weighr of 12. The molecular weight to its oxide will be_______?
24
32
36
40
Explanation:
The correct answer to the question is: 40
Q.
An acid with unpleasant smell_________________?
acetic acid
propionic acid
formic acid
butyric acid
Explanation:
The correct answer to the question is: butyric acid
Q.
The system which can exchange matter as well as energy with its surroundings is called____________?
Isolated system
Inert system
open system
Closed system
Explanation:
The correct answer to the question is: open system
Q.
Formalin is ___________ solution of formaldehyde in water?
40%
20%
60%
10%
Explanation:
The correct answer to the question is: 40%
Q.
The element cesium bears resemblance with________________?
Ca
None of the above
Both of the above
Cr
Explanation:
The correct answer to the question is: None of the above
Q.
Li is different from its family members due to____________________?
high charge density
less electropositivity
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________________?
Low electropositivity
Low electronegativity
Not known yet
Low charge density
Explanation:
The correct answer to the question is: Low electropositivity
Q.
Alkyl halides undergo a type of reaction_________________?
Nucleophilic addition
Elimination
both A & C
Nucleophilic substitution
Explanation:
The correct answer to the question is: both A & C
Q.
If temperature of gallium arsenide is increased then its conductivity will___________________?
decrease
remains constant
first decreases then increases
increase
Explanation:
The correct answer to the question is: increase
Q.
Order of ease of halogenation in alkane is________________?
Cl2>F2>Br2>I2
I2>Cl2>Br2>F2
F2>Cl2>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 _______________?
More Soluble in water
Soluble in water on heating
Insoluble in all solvents
Insoluble 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?
Galvanic cell
Electrolytic cell
Daniel cell
Not
Explanation:
The correct answer to the question is: Electrolytic cell
Q.
The bond angle between hybrid orbitals in methane CH3 is___________?
180°
109.5°
115.5°
105. 7°
Explanation:
The correct answer to the question is: 109.5°
Q.
Phosphorus is a Greek word and it means_________________?
Fire
Impure
Tetrahedral
Light bearing
Explanation:
The correct answer to the question is: Light bearing
Q.
Alkaline PH scale starts from?
0 to 14
7 to 11
6 to 10
8 to 14
Explanation:
The correct answer to the question is: 8 to 14
Q.
The word Alkali means__________________?
Basic salt
Spirit
Ashes
Base
Explanation:
The correct answer to the question is: Ashes
Q.
At what digit of PH scale PH is neutral?
10
7
3
5
Explanation:
The correct answer to the question is: 7
Q.
Silver nitrate is also known as____________?
Lunar Caustic
Blue Vitriol
Blue Stone
Both A & B
Explanation:
The correct answer to the question is: Lunar Caustic
Q.
Optic fibres are used in :
CAT scans
Ultrasound scans
Endoscopy
X-ray photos
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 ?
Iodine
Fluorine
Chlorine
Bromine
Explanation:
The correct answer to the question is: Fluorine
Q.
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphorus
Phosphine
Water
Phosphorus pentoxide
Explanation:
The correct answer to the question is: Phosphine
Q.
Which of the following is a soft Coal?
Anthracite
Peat
Bituminous
Lignite
Explanation:
The correct answer to the question is: Bituminous
Q.
The properties which do not depend on mass of the substance are _____________?
intensive properties
Extensive properties
None of These
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?
NaCl
KOH
NaOH
NaBH4
Explanation:
The correct answer to the question is: KOH
Q.
Soil pollution is caused by:_________?
PAN
Ozone
Aerosol
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 its Acidity and Basicity
None of These
To Check temperature
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 ___________________?
Sulphur
Oxygen
Hydrogen
OH
Explanation:
The correct answer to the question is: Sulphur
Q.
The halogen which reacts very slowly with halogen is________________?
Iodine
Fluorine
Bromine
Chlorine
Explanation:
The correct answer to the question is: Iodine
Q.
The O-O linkage is present in__________?
H2S2O3
H2S4O6
H2SO8
H2 S2 O6
Explanation:
The correct answer to the question is: H2SO8
Q.
Why does Ethyl Alcohol show high boiling point then Acetone?
Due to high molecular weight
Due to Hydrogen bonding
Due to its Acidic nature
Due to its Low molecular weight
Explanation:
The correct answer to the question is: Due to Hydrogen bonding
Q.
Colour in transition metal compounds is attributed to____________?
Complete ns sub-shell
Small sized metal ions
Absorption of light in UV region
Incomplete (n-1) d sub-shell
Explanation:
The correct answer to the question is: Incomplete (n-1) d sub-shell
Q.
In homologous series there is the difference of mass between adjacent members.
Q.
Parke’s process is used in the extraction of________?
Sodium
Iron
Zinc
Silver
Explanation:
The correct answer to the question is: Silver
Q.
If speed of gas molecules increases by twice on heating. What will be their kinetic energy?
decrease by four times
increases by two times
decreases by two times
increases by four times
Explanation:
The correct answer to the question is: increases by four times
Q.
All the elements in group VIA are ___________________ in nature?
metals
all of above
polymeric
hygroscopic
Explanation:
The correct answer to the question is: polymeric
Q.
The usual property of ionic crystal are:_____________?
Compound forming
gaseous form
Stable
Unstable
Explanation:
The correct answer to the question is: Compound forming
Q.
The phosphate present in sewage water which cause eutrophication Can be removed by adding:
Alum
permangnate
Chlorine
Lime
Explanation:
The correct answer to the question is: Lime
Q.
The resonance energy of benzene is__________________?
150.5 kJ/mol
250.5 Cal/mol
150.5 Cal/mol
250.5 kJ/mol
Explanation:
The correct answer to the question is: 150.5 kJ/mol
Q.
The heat required to raise the temperature of body by 1 K is called___________?
specific heat
thermal capacity
None of the above
water equivalent
Explanation:
The correct answer to the question is: thermal capacity
Q.
In unsaturated hydrocarbons electrons favour___________________?
less reactivity
none
substitution reactions
addition reactions
Explanation:
The correct answer to the question is: addition reactions
Q.
The formula of starch is__________________?
(C6H10O5)n
C6H12O6
C6H10O5
C12H22O11
Explanation:
The correct answer to the question is: (C6H10O5)n
Q.
Who is often referred to as the “father of Chemistry”?
Dmitri Mendeleev
Isaac Newton
Albert Einstein
Antoine Lavoisier
Explanation:
The correct answer to the question is: Antoine Lavoisier
Q.
Which one of the following gives white precipitate with aqueous solution of BaCl2?
Na2CO3
NaNO3
NaHCO3
Na2CrO4
Explanation:
The correct answer to the question is: Na2CO3
Q.
Column of manometer which faces liquid is __________ ?
Remains same
Depressed
Raised
Compressed
Explanation:
The correct answer to the question is: Depressed
Q.
4moles of Carbon dioxide(CO2) have _____molecules.
12.04 x 10
18.06 x 10
24.08 x 10
6.02 x 10
Explanation:
The correct answer to the question is: 24.08 x 10
Q.
According to Kinetic Molecular Theory gas molecules move in_______path?
Straight
Hyperbolic
Zig-zag
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)2 CH – X
(CH3)3 C – X
CH3-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 __________ ?
75.3pm
75.5pm
75.4pm
75.2pm
Explanation:
The correct answer to the question is: 75.4pm
Q.
O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
Ethylene oxide
Ethyl alcohol
HCHO
Ethylene glycol
Explanation:
The correct answer to the question is: HCHO
Q.
The bond energy of Hydrogen molecule is__________?
150KJcal/mol
110Kcal/mol
106Kcal/mol
104Kcal/mol
Explanation:
The correct answer to the question is: 104Kcal/mol
Q.
The following alcohol does not undergo oxidation is _____________?
0° alcohol
3° alcohol
2° alcohol
1° 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 absence of Oxygen
The presence of Oxygen
The presence of Hydrogen
The presence of excessive Oxygen
Explanation:
The correct answer to the question is: The absence of Oxygen
Q.
SN2 reaction can be best carried out with__________________?
tertiary alkyl halide
secondary alkyl halide
primary alkyl halide
all
Explanation:
The correct answer to the question is: primary alkyl halide
Q.
Magnesium metal does not burn in the vessel containing_______________?
O2
N2
Ne
N2 and O2
Explanation:
The correct answer to the question is: Ne
Q.
Which is fused cyclic aromatic compound _____________________?
diphenyl methane
naphthalene
diphenyl amine
biphenyl
Explanation:
The correct answer to the question is: naphthalene
Q.
Potassium Permanganate is used for purifying drinking water, because_________?
It is a reducing agent.
It dissolves the impurities of water.
It is a sterilising agent.
It is an oxidising agent.
Explanation:
The correct answer to the question is: It is an oxidising agent.
Q.
Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
Ketones
Aldehydes
Halides
Alkali metals
Explanation:
The correct answer to the question is: Halides
Q.
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
primary alcohol
dihydric alcohol
secondary alcohol
tertiary alcohol
Explanation:
The correct answer to the question is: tertiary alcohol
Q.
The metallurgical process in which a metal is obtained in a fused state is called__________?
froth floatation
smelting
calcinations
roasting
Explanation:
The correct answer to the question is: smelting
Q.
The gas which cannot be dried by conc. H2SO4 ?
H2S
C2H4
CO2
SO2
Explanation:
The correct answer to the question is: H2S
Q.
Ce58 is a member of__________?
P-block
f-block
d-block
S-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________________?
N2O
NO2
N2O3
NO
Explanation:
The correct answer to the question is: NO
Q.
The Branch of chemistry dealing with brewing and distilling is called _______ ?
Zymology
Zymurgy
Zygology
Zootaxy
Explanation:
The correct answer to the question is: Zymurgy
Q.
In diaphragm cell hydrogen is discharged by the reduction of__________________?
Water
NaCl
Na+
HCI
Explanation:
The correct answer to the question is: Water
Q.
The rays that have negative charge are ___________?
Anode Rays
Gamma Rays
Cathode Rays
Canal Rays
Explanation:
The correct answer to the question is: Cathode Rays
Q.
What is the formula of Silver nitrate?
AgNO3
AgNO
AgNO2
AgNO4
Explanation:
The correct answer to the question is: AgNO3
Q.
Coal gas is made up of mostly ________ & _________?
Hydrogen & Water
Hydrogen & Methane
Hydrogen & Carbon dioxide
Carbonmonoxdide & water
Explanation:
The correct answer to the question is: Hydrogen & Methane
Q.
Removal of CO2 is called_____________________?
hydroxylation
carboxylation
decarboxylation
esterification
Explanation:
The correct answer to the question is: decarboxylation
Q.
The oxidation state of cu which are expected to be diamagnetic
Cu+1
Cu+2
Cu+4
Cu+3
Explanation:
The correct answer to the question is: Cu+1
Q.
The marsh gas is ___________?
Propane
Methane
Ethane
Butane
Explanation:
The correct answer to the question is: Methane
Q.
The maximum oxidation shown by manages is_________?
+4
+5
+2
+7
Explanation:
The correct answer to the question is: +7
Q.
The oxides of beryllium BeO is_______________?
Acidic
Basic
Neutral
Amphoteric
Explanation:
The correct answer to the question is: Amphoteric
Q.
When one hydrogen atom of alkane is removed then it is called________________?
saturated hydrocarbon
aldehyde
alkyl
alkene
Explanation:
The correct answer to the question is: alkyl
Q.
Which of the following is a neutral particle ?
Proton
Alpha particle
Electron
Neutron
Explanation:
The correct answer to the question is: Neutron
Q.
Boron in soil has been considered micronutrient for_________________?
Soil porocity
Alkalinity of soil
Proper growth of plants
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
ZNO2
Zn(OH)2
ZnOH
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
Br2
Cl2
I2
Explanation:
The correct answer to the question is: Cl2
Q.
Benzene gives mainly_________?
Halogenation
All of these
Substitution reactions
Addition reaction
Explanation:
The correct answer to the question is: Substitution reactions
Q.
In which compound nitrogen has maximum oxidation state____________________?
HNO3
HNO2
N2O
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 ______?
Cr²O³
Both B&C
FeO
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 ?
Cl2O7
Cl2O6
ClO2
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 has a low specific heat capacity
it reflects most of the heat from the sun
it has a high latent heat of fusion
it becomes very hard
Explanation:
The correct answer to the question is: it has a high latent heat of fusion
Q.
The source of the Sun’s energy is the process of ____________?
Photoelectric emission
Nuclear fission
Nuclear fusion
Thermionic emission
Explanation:
The correct answer to the question is: Nuclear fusion
Q.
The metal which is used in thermite process because of its activity is____________________?
copper
zinc
aluminium
iron
Explanation:
The correct answer to the question is: aluminium
Q.
LiAlH4 converts Acetaldehyde into ___________?
Methane
Acetic acid
Methyl alcohol
Ethyl alcohol
Explanation:
The correct answer to the question is: Ethyl alcohol
Q.
The solution remaining after the formation of crystals is called ___________________?
Residue
Mother liquor
Dilute solution
both A & B
Explanation:
The correct answer to the question is: Mother liquor
Q.
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
an acid
an oxidizing agent
a dehydrating agent
as sulphonating agent
Explanation:
The correct answer to the question is: a dehydrating agent
Q.
Which one is a pure carbon?
Coal gas
Coal Tar
Coke
None of These
Explanation:
The correct answer to the question is: Coke
Q.
The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________?
Raoult’s law
Gay Lussac’s law
Henry’s law
Dalton’s law
Explanation:
The correct answer to the question is: Henry’s law
Q.
When phenol is heated with concentrated nitric acid the product is________________?
Picric acid
o-nitrophenol
1 3 5 -trinitro benzene
p-nitrophenol
Explanation:
The correct answer to the question is: Picric acid
Q.
The systematic name of sucrose is_______?
11-α-D-glucopyranosyl-2-β-D-fructofuranoside
1-β- D- glucofuranosyl-2-α- D- fructofuranoside
1-α-D- glucofuranosyl-2-α-D- fructopyranoside
1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Explanation:
The correct answer to the question is: 1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Q.
Iodoform test can be used to distinguish between_________________?
all of the above
acetone and diethyl ketone
ethanol and methanol
acetaldehyde and methanal
Explanation:
The correct answer to the question is: all of the above
Q.
What are the metal bearing rocks called?
Bitumen
Metalloids
Bauxite
Ores
Explanation:
The correct answer to the question is: Ores
Q.
Find the PH of a 0.001 M solution of Nitric acid HNO3?
2
4
5
3
Explanation:
The correct answer to the question is: 3
Q.
Which one does not give borax bead test_________________?
Nickel sulphate
Cobalt sulphate
Barium sulphate
Copper sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
Removal of halogen and hydrogen atom is_________________?
hydrohalogenation
halogenation
dehydrohalogenation
dehalogenation
Explanation:
The correct answer to the question is: dehydrohalogenation
Q.
Cathode is a metalic plate where__________ takes place.
Oxidation
Substitution
Redox
Reduction
Explanation:
The correct answer to the question is: Reduction
Q.
In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
H²O
None of them
Flouride
Sodium
Explanation:
The correct answer to the question is: H²O
Q.
Borax is a white crystalline solid and it is_________________?
Soluble only in organic solvents
More soluble in hot water
Insoluble in water
More soluble in cold water
Explanation:
The correct answer to the question is: More soluble in hot water
Q.
Which allotropic form of phosphorous is the most stable ?
black
red
Violet
White
Explanation:
The correct answer to the question is: black
Q.
Preparation of vegetable ghee involves_________________?
hydrogenation
hydration
hydroxylation
halogenation
Explanation:
The correct answer to the question is: hydrogenation
Q.
which Compound Destroy The OZONE ?
BOTH A & B
CH3COOH
None Of These
CFCs
Explanation:
The correct answer to the question is: CFCs
Q.
The medium which interact with long lived pollutant is:_____________?
Sink
Source
All of them
Receptor
Explanation:
The correct answer to the question is: Sink
Q.
Acetaldehyde cannot show
Tollen’s test
Iodoform test
Lucas 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?
used as mordant in dyeing
used in photography and medicines
All of these
used in making green pigments
Explanation:
The correct answer to the question is: used in photography and medicines
Q.
Which one of the following pairs shown diagonal relationship in the periodic table ?
Sodium and Lithium
Lithium and beryllium
Boron and Beryllium
Lithium and magnesium
Explanation:
The correct answer to the question is: Lithium and magnesium
Q.
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
Electrophilic substitution
Necleophilic substitution
Nucleophilic addition
Electrophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
methoxide ion
hydride ion
hydrogen ion
oxide ion
Explanation:
The correct answer to the question is: hydride ion
Q.
Photographic plates are coated with a thin film of _________________?
AgI
AgCl
AgNO3
AgBr
Explanation:
The correct answer to the question is: AgBr
Q.
One Water molecule can form maximum ______hydrogen bonds.
3
4
None
2
Explanation:
The correct answer to the question is: 4
Q.
Boyle’s Law was given by the Robert Boyle in_______?
1661
1662
1660
1663
Explanation:
The correct answer to the question is: 1662
Q.
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Diastase-maltase-zymase
Maltase-diastase-zymase
Diastase-zymase-maltase
Zymase-maltase-diastase
Explanation:
The correct answer to the question is: Diastase-maltase-zymase
Q.
The chemical composition of cinnabar is__________________?
PbS
FeS
HgS
ZnS
Explanation:
The correct answer to the question is: HgS
Q.
Identify the unsaturated compound that does not give red ppts when treated with____________Ammonical cuprous chloride
CH=CH
CH-CH-CCH (1-Butyne)
CH-CCH(1-Propyne)
CH-CH-CHCCH(1-Pentyne)
Explanation:
The correct answer to the question is: CH=CH
Q.
Raney nickel is prepared from ______________________ by treating with caustic soda?
Ni-Mg alloy
Ni-Fe alloy
Ni-Cu alloy
Ni-Al alloy
Explanation:
The correct answer to the question is: Ni-Al alloy
Q.
The practical problem in Hydrogen production is it:______________?
Chemical property
Size
Valency
Weight
Explanation:
The correct answer to the question is: Weight
Q.
Which of the following shows electrical conduction_____?
Graphite
Potassium
Diamond
Sodium
Explanation:
The correct answer to the question is: Graphite
Q.
Chlorination of toluene in the presence of sublight produces_________________?
benzoic acid
Benzyl chloride
o – chlorotoluene
p – chlorotoluene
Explanation:
The correct answer to the question is: Benzyl chloride
Q.
Octane number is 0 value for ___________?
iso-heptane
n-hexane
n-heptane
iso-octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Which one of the following substances conducts electricity by the movement of ions ?
Molten sodium chloride
Graphite
Copper
Mercury
Explanation:
The correct answer to the question is: Molten sodium chloride
Q.
The fundamental way to transfer energy are:_____________?
heat and work
pressure and temperature
heat and volume
pressure and volume
Explanation:
The correct answer to the question is: heat and work
Q.
The main buffer system of the human blood is____________?
NHCONH – NHCONH
HCO – CO
CHCOOH – CHCOO
HCO – HCO
Explanation:
The correct answer to the question is: HCO – HCO
Q.
The acetylene molecule contains:___________?
2 sigma and 3 pi bonds
4 sigma and 1 pi bonds
5 sigma 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:__________?
Nitrates
Fluorides
Arsenic
Mercury
Explanation:
The correct answer to the question is: Arsenic
Q.
Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Sabatier Senderns reaction involve _____________ in presence of Ni?
alkene & N2
alkyne & Cl2
alkene & O2
Aalkene & H2
Explanation:
The correct answer to the question is: Aalkene & H2
Q.
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
2
6
1
4
Explanation:
The correct answer to the question is: 4
Q.
Surface Tension ________with increasing the surface area of liquid?
None
Decreases
Increases
Remains Same
Explanation:
The correct answer to the question is: Decreases
Q.
Which of the following reagents will react with both aldehydes and ketones ?
Fehlings reagent
Tollens reagent
Grignard reagent
Benedicts reagent
Explanation:
The correct answer to the question is: Grignard reagent
Q.
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
this corrosive acid is secreted by ants to drive away their enemies
this acid was first obtained by the distillation of ants
ants are attracted by the odour of this acid
this acid, in ancient times, was used to eliminate ant-hills
Explanation:
The correct answer to the question is: this acid was first obtained by the distillation of ants
Q.
Soda lime is a mixture of____________________?
CaO and NaOH
CaO and KOH
NaOH and Na2O
Na2O and KOH
Explanation:
The correct answer to the question is: CaO and NaOH
Q.
Ethanol can be converted into ethanoic acid by_________________?
Fermentation
Hydrogenation
Hydration
Oxidation
Explanation:
The correct answer to the question is: Oxidation
Q.
The most useful dye for those fabric which can form hydrogen bonds is:_____________?
Vat dye
Mordent dye
Acid dye
Direct dye
Explanation:
The correct answer to the question is: Direct dye
Q.
Sodium is not observed in +2 oxidation state because of its__________________?
high ionic radius
high first ionization potential
high electronegativity
high second ioniation potential
Explanation:
The correct answer to the question is: high second ioniation potential
Q.
Which one of the following is the weakest acid in water__________________?
HI
HCI
HF
HBr
Explanation:
The correct answer to the question is: HF
Q.
Which of the following sulphates is not soluble in water ?
Potassium sulphate
Barium sulphate
Sodium sulphate
Zinc sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
78% Fe
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:
Infrared
All of these
Ultra voilet
Gamma rays
Explanation:
The correct answer to the question is: Infrared
Q.
Product of Nucleophilic Substitution Uni Molecular reaction is in case of chiral substrate?
Stereospecific
Recemic Mixture
Inversion
Retention
Explanation:
The correct answer to the question is: Recemic Mixture
Q.
The Electronegativity of Hydrogen is _____.
2.2
1.8
2.8
3.1
Explanation:
The correct answer to the question is: 2.2
Q.
The valency of carbon Atom is __________ ?
2
3
1
4
Explanation:
The correct answer to the question is: 4
Q.
Elements which emit natural radioactivity are known as __________ ?
Radio elements
Nuclear elements
Radioactive elements
Active elements
Explanation:
The correct answer to the question is: Radioactive elements
Q.
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
0.900
0.215
0.115
0.015
Explanation:
The correct answer to the question is: 0.115
Q.
The typical reactions of aldehyde is _____________?
Nucleophilic substitution
Electrophilic addition
Nucleophilic addition
Nucleophilic elimination
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
Losing of electrons
Sharing of electrons
Gain of electrons
Explanation:
The correct answer to the question is: Sharing of electrons
Q.
One fathom is equal to:__________?
60 feet
6 meters
6 feet
100 cm
Explanation:
The correct answer to the question is: 6 feet
Q.
Silicon differ from silica by a group of__________________?
OCH3
Ch3
OH
O2
Explanation:
The correct answer to the question is: Ch3
Q.
A metallic atom loses its valence electron to form a/an _________?
an anion – cation
an anion
none of these
a cation
Explanation:
The correct answer to the question is: a cation
Q.
Which compound shows hydrogen bonding ?
C2H5Cl
C2H5OH
C2H6
CH3OCH3
Explanation:
The correct answer to the question is: C2H5OH
Q.
Which of the following alloys contain(s) Cu and Zn?
Brass
Bronze
Gun-metal
Type metal
Explanation:
The correct answer to the question is: Brass
Q.
Noble gases are so called zero group because they have:_________?
Zero Valency
Zero Electronegativity
Zero Electron Affinity
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Magnetic quantum number specifies___________?
All of the above
Size of orbitals
Orientation of orbitals
Shape of orbitals
Explanation:
The correct answer to the question is: Orientation of orbitals
Q.
2-Butyne contains:______________?
sp hybridised carbon atoms only
both sp and sp hybridised carbon atoms
sp hybridised carbon atoms only
both sp and sp hybridised carbon atoms
Explanation:
The correct answer to the question is: both sp and sp hybridised carbon atoms
Q.
Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
Propanoic acid
Lactic acid
Valeric acid
Tartaric acid
Explanation:
The correct answer to the question is: Lactic acid
Q.
How many isomeric aldoses are possible for the molecular formula C6H12O6?
4
7
2
16
Explanation:
The correct answer to the question is: 16
Q.
Lead battery is secondary battery the paste used in it is______________?
AOT
Ammonium chloride
Magnese dioxide
Zinc chloride
Explanation:
The correct answer to the question is: AOT
Q.
Identify the Lucas reagent among the following
Dil. HCl & hydrated ZnCl
Conc. HCl & Anhydrous ZnCl
Conc. HNO & Anhydrous MgCl
Conc. HNO & Anhydrous ZnCl
Explanation:
The correct answer to the question is: Conc. HCl & Anhydrous ZnCl
Q.
The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?
8
5
6
7
Explanation:
The correct answer to the question is: 5
Q.
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
S-Block
P-Block
f-Block
d-Block
Explanation:
The correct answer to the question is: f-Block
Q.
Which compound will readily undergo sulphonation ?
Chlorobenzene
Nitro benzene
Toluene
Benzene
Explanation:
The correct answer to the question is: Toluene
Q.
If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?
C2H2O4
CHO2
CH2O
CH2
Explanation:
The correct answer to the question is: CHO2
Q.
The Ionization energy of Hydrogen is __________?
17.56ev
12.54ev
10.54ev
13.6ev
Explanation:
The correct answer to the question is: 13.6ev
Q.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
formaldehyde
benzaldehyde
acetone
accetaldehyde
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 _________ ?
Alpha particle
Beta particle
Gamma particle
Negative particle
Explanation:
The correct answer to the question is: Alpha particle
Q.
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
Chlorine
Fluorine
Bromine
Iodine
Explanation:
The correct answer to the question is: Iodine
Q.
The molecules of which gas have highest speed?
H at -73C
O at 0C
CH at 300 K
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 forms molecular addition compounds
all of the above
it has small size
it has high nuclear charge
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following will not give addition reaction with NaHSO3________________?
CH3-CH2-CHO
HCHO
None of the above
CH3CHO
Explanation:
The correct answer to the question is: CH3-CH2-CHO
Q.
The common oxidation state of lanthanides is_________?
+2
+4
+3
+1
Explanation:
The correct answer to the question is: +3
Q.
The decomposition of nitroglycerine is an example of:
induced catalysis
Autocatalytic reaction
Self catalytic reaction
Enzyme catalytic reaction
Explanation:
The correct answer to the question is: Autocatalytic reaction
Q.
Which of the following will give phosphoric acid one reaction with water_________________?
All of the above
P2O5
PCI5
P2O3
Explanation:
The correct answer to the question is: All of the above
Q.
Which one of the following serve as aquatic solar fuel cell:
Virus
Bacteria
Algae
Fungi
Explanation:
The correct answer to the question is: Algae
Q.
The Bond Energy of H-F is________?
562kJ/mol
456kJ/mol
None
281kJ/mol
Explanation:
The correct answer to the question is: 562kJ/mol
Q.
Barometer was invented by _______?
Huygen
Pascal
Newton
Torricelli
Explanation:
The correct answer to the question is: Torricelli
Q.
Which of the following do not give aldol condensation reactions ?
formaldehyde
diemthyl ketone
acetaldehyde
propionaldehyde
Explanation:
The correct answer to the question is: formaldehyde
Q.
Electromeric effect is ____________?
None of the above
Operate due to electronegativity difference
Permanent effect
temporary effect
Explanation:
The correct answer to the question is: temporary effect
Q.
In electrolysis of NaCl the product obtained at cathode is_______.
Sodium ions
Chloride ions
Remain at the bottom of the cell
Both
Explanation:
The correct answer to the question is: Sodium ions
Q.
The term internal salt refers to_____________________?
Basic character of amino acids
Dipolar character of amino acids
Non-polar structure of amino acids
Acidic character of amino acids
Explanation:
The correct answer to the question is: Dipolar character of amino acids
Q.
The composition of brown ring in nitrate test is_________________?
FeSO4.N2o
FeSO4.No
FeSO4.No2
FeSO4.No3
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/2
3R/4
2 R
R/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
Sodium
Lithium
Explanation:
The correct answer to the question is: Lithium
Q.
Which of the following is most soluble on water?
CaSO4
SrSO4
BaSO4
MgSO4
Explanation:
The correct answer to the question is: MgSO4
Q.
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
Elimination reaction
Addition reaction
Substitution reaction
Oxidation reaction
Explanation:
The correct answer to the question is: Oxidation reaction
Q.
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
All
They are more reactive
They have greater atomic radii
They have smaller atomic sizes
Explanation:
The correct answer to the question is: They have smaller atomic sizes
Q.
Hydrogen bonding is present in __________?
Water
Ethyl Alcohol
All of these
Phenol
Explanation:
The correct answer to the question is: All of these
Q.
Chlorine Cl when attached to benzene has________?
+I and +R effect
-I and -R effect
+1 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
Diols
Vicinal dihalides
Glycols
Explanation:
The correct answer to the question is: Vicinal dihalides
Q.
The colour of chlorine gas is_______________?
reddish brown
pale yellow
grayish black
freenish yellow
Explanation:
The correct answer to the question is: freenish yellow