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Top Chemistry MCQS Questions
Q.
Transition temperature for tin grey & tin white is : _____________?
128.15°C
96°C
18°C
246.12°C
Explanation:
The correct answer to the question is: 18°C
Q.
Beillstein test is used for________?
N2
CO
CO2
Cl
Explanation:
The correct answer to the question is: Cl
Q.
Main use of salt in diet is to : ___________?
ease the process of cooking
increase the taste
produce small amount of hydrochloric acid required for digestion
inclease solubility of food particles in water
Explanation:
The correct answer to the question is: produce small amount of hydrochloric acid required for digestion
Q.
Quantum numbers are __________ ?
Leometric values
Arithmetical values
Logical values
Numerical values
Explanation:
The correct answer to the question is: Numerical values
Q.
Hexamethylene diamine and adipic acid combine to form _____________?
Natural rubber
Polystyrene
nylon 6-6
Synthetic rubber
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Which of the following does not give Borax bead test ?
Ni
Cr
Cu
A1
Explanation:
The correct answer to the question is: A1
Q.
The concept of ensemble was introduced by____________?
Carnot
Boltzmann
Gibbs
Mexwell
Explanation:
The correct answer to the question is: Gibbs
Q.
Which of the following is used in photography?
Na2SO3
NaHSO3
Na2S2O3
Na2S
Explanation:
The correct answer to the question is: Na2S2O3
Q.
At higher temperature, Ethyne on reaction with water in the presence of HgSO4 and H2SO4 gives:
Acetic acid
Ethyl alcohol
Acetaldehyde
Acetone
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
The number of molecules taking part in the rate determining step is called___________________?
Mole of a reaction
Rate of reaction
Order of reaction
Extent of a reaction
Explanation:
The correct answer to the question is: Order of reaction
Q.
The Clemmenson reduction of acetone yields
Propane
Propanol
Ethanal
Ethanol
Explanation:
The correct answer to the question is: Propane
Q.
One of the outstanding features of boron is its ability to form__________________?
Ionic compounds
Semiconductors
Molecular crystals
Molecular addition compounds
Explanation:
The correct answer to the question is: Molecular addition compounds
Q.
__________ is one of the allotropic modifications of carbon.
Silicon
Graphite
Diamond
Iodine
Explanation:
The correct answer to the question is: Diamond
Q.
Which of the following statement is correct ?
size of Na+ ion < Na atom
Cl- < Na+
size of Cl atoms > Cl- ion
size of Na atom < Na+ ion
Explanation:
The correct answer to the question is: size of Na+ ion < Na atom
Q.
Basicity of orthophosphoric acid is________?
3
2
4
5
Explanation:
The correct answer to the question is: 3
Q.
Which one of the following carbonate is water insoluble ?
(NH4)2CO3
K2CO3
Na2CO3
CaCO3
Explanation:
The correct answer to the question is: CaCO3
Q.
The molecular formula of Sucrose(Sugar) is___________?
CH
CHO
CHO
NH
Explanation:
The correct answer to the question is: CHO
Q.
Ammonium cynanate was 1st Inorganic compound that was converted into an Organic compound (in Lab) through boiling water. The organic compound was____.
Urea
Methane
Ethanol
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?
Isomeric effect
Resonance effect
Inductive effect
Intermolecular H-bonding
Explanation:
The correct answer to the question is: Intermolecular H-bonding
Q.
Which of the following shows inert pair effect ?
tin
boron
silicon
carbon
Explanation:
The correct answer to the question is: tin
Q.
Which one can form complex ?
K
Na
Cr
Li
Explanation:
The correct answer to the question is: Li
Q.
The strongest hydrogen bonding is present in: _____________?
Ammonia gas
Ethanol
Ice
Acetone and chloroform
Explanation:
The correct answer to the question is: Ice
Q.
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Oxidation
Both b & c
Decomposition
Reduction
Explanation:
The correct answer to the question is: Both b & c
Q.
Which one is natron ?
NaHCO3
Na2CO3.H2O
Na2CO3
Na2CO3.10H2O
Explanation:
The correct answer to the question is: Na2CO3.H2O
Q.
Radiations are harmful as it:___________?
is unstable
Causes anemia
Causes skin cancer
Alters body tissue
Explanation:
The correct answer to the question is: Causes skin cancer
Q.
The chemical formula of sodium hypochlorite is________________?
NaClO4
NaCLO
NaClO2
NaClO3
Explanation:
The correct answer to the question is: NaCLO
Q.
Which C-X bond has the highest bond energy per mole ?
C-F
C-I
C-C
C-Br
Explanation:
The correct answer to the question is: C-F
Q.
In water molecule, Hydrogen & water are held together by ______ bond.
Dating
Ionic
Hydrogen
Covalent
Explanation:
The correct answer to the question is: Covalent
Q.
Which of the halogen can displace other three elements ?
Chlorine
Iodine
Bromine
Flourine
Explanation:
The correct answer to the question is: Flourine
Q.
A process in which large molecules are broken up into into smaller molecules is called as_____.
Refining
Reforming
Cracking
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
acetaldehyde
carbondioxide
formaldehyde
Explanation:
The correct answer to the question is: carbondioxide
Q.
The ore CaSO4.H2O has the general name_______________?
Gypsum
Calcite
Plaster of Paris
Dolomite
Explanation:
The correct answer to the question is: Gypsum
Q.
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
elimination
additional polymertization
oxidation
condensation polymerization
Explanation:
The correct answer to the question is: condensation polymerization
Q.
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
Gay-Lussac’s law
None of these
Graham’s Law
Boyle’s law
Explanation:
The correct answer to the question is: Graham’s Law
Q.
Identify the correct statement regarding CO_______________?
it combines with H2O to form carbonic acid
it is powerful oxidizing agent
it reacts with red blood cells of haemoglobin
it is used to prepare aerated drinks
Explanation:
The correct answer to the question is: it reacts with red blood cells of haemoglobin
Q.
Treatment of sucrose with conc. HNO3 gives__________?
Nitrosucrose
Oxalic acid
Laevulinic acid
Glucose+ fructose
Explanation:
The correct answer to the question is: Nitrosucrose
Q.
Ethers show functional group isomerism with __________________?
aldehydes
ketones
alcohols
carboxylic acid
Explanation:
The correct answer to the question is: alcohols
Q.
which of the following is a non-crystalline solid pair?
wood, glass
glass, table salt
diamond, wood
sucrose. glass
Explanation:
The correct answer to the question is: wood, glass
Q.
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
2 moles of ethane
2 moles of butane
1 mole of ethane
1 mole of butane
Explanation:
The correct answer to the question is: 1 mole of butane
Q.
Polyethylene Glycols are used in the preparation of which type of detergents?
All of above
Non-ionic detergents soap
Cationic detergents
Anionic detergents
Explanation:
The correct answer to the question is: Non-ionic detergents soap
Q.
Phenol was isolated by Runge from________________?
coaltar
wood
vegetable oil
none of these
Explanation:
The correct answer to the question is: coaltar
Q.
Out of Alkane, Alkene & Alkyne, which one is more acidic?
Alkyne
All have same
Alkane
Alkene
Explanation:
The correct answer to the question is: Alkyne
Q.
The coloured glassy mass in borax bead test is due to the formation of___________________?
metal boride
metal borate
metal meta borate
metal silicate
Explanation:
The correct answer to the question is: metal meta borate
Q.
The radiations with highest speed are _______.
Alpha radiations
Gamma radiations
AOT
Beta radiations
Explanation:
The correct answer to the question is: Gamma radiations
Q.
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
Nitriding
Annealing
Quenching
Tempering
Explanation:
The correct answer to the question is: Annealing
Q.
If volumetric analysis methyl orange indicator is used when_________?
Acid is strong base is weak
Bade is strong
Acid is strong
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
0.12g
0.16g
0.18g
Explanation:
The correct answer to the question is: 0.18g
Q.
Which of the following aqueous solutions would have the highest boiling point?
0.15 m CaCl2
0.20 m glucose
0.25 m sucrose
0.20 m NaCl
Explanation:
The correct answer to the question is: 0.15 m CaCl2
Q.
The formula of palmitic acid_________________?
C13H27COOH
C17H35COOH
C17H33COOH
C15H31COOH
Explanation:
The correct answer to the question is: C15H31COOH
Q.
Which one of the following is not an alkali metal ?
Francium
Rubidium
Radium
Caesium
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
Hydrogen Gas &Water
Only Water
Only oxygen
Explanation:
The correct answer to the question is: Hydrogen Gas &Water
Q.
Which of the following is the weakest reducing agent ?
HBr
HC
HI
HF
Explanation:
The correct answer to the question is: HF
Q.
During sulphonation of benzene H2SO4 generates the electrophile _________________?
HSO4-
SO3
H+
SO2
Explanation:
The correct answer to the question is: SO3
Q.
Size of colloidal particles
None of These
greater than suspension
greater than true solution
In b/w true solution & 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 has lowest dissociation energy among the halogens
fluorine follows octet rule and as well as extended octet rule
both B and C
fluorine is restricted to -1 oxidation state
Explanation:
The correct answer to the question is: both B and C
Q.
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
methanoic acid
ethanol
acetic acid
carbonic acid
Explanation:
The correct answer to the question is: acetic acid
Q.
Antiseptic Urotropine formed by ____________?
Carboxylic acid
Ketone
Formaldehyde
Acetaldehyde
Explanation:
The correct answer to the question is: Formaldehyde
Q.
Hydrogenolysis results in the formation of________________?
alkyne
alkene
aldehydes
alkane
Explanation:
The correct answer to the question is: alkane
Q.
Which of the following reaction is not shown by ketones ?
reaction with NaHSO3
reaction with HCN
reaction with Fehling solution
reaction with 2 4 dinitrophenyl hydrazine
Explanation:
The correct answer to the question is: reaction with Fehling solution
Q.
Which one is Chloroform_________________?
CHCl3
CH2Cl2
CH3Cl
CCl4
Explanation:
The correct answer to the question is: CHCl3
Q.
Which of the following is not the name of any scientist?
Pauli exclusion principle
Aufbau’s principle
Hund’s rule
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
Dows process
Friedel & Craft alkylation
Clemmenson reduction
Explanation:
The correct answer to the question is: Friedel & Craft alkylation
Q.
Methyl alcohol is not used__________________?
As an antifreezing agent
As a substitute for petrol
For denaturing of ethyl alcohol
As a solvent
Explanation:
The correct answer to the question is: As a substitute for petrol
Q.
Phonon is Quantum of___________?
Transverse wave
Electromagnetic wave
Longitudinal wave
Elastic wave
Explanation:
The correct answer to the question is: Elastic wave
Q.
Aluminium oxide is_________________?
Basic oxide
Acidic oxide
Amphoteric oxide
It does not exists
Explanation:
The correct answer to the question is: Amphoteric oxide
Q.
Which one of the following is also known as lactic acid ?
2-Hydroxy propanoic acid
3-hydroxy butanoic acid
3-Hydroxy propanoic acid
2-hydroxy butanoic acid
Explanation:
The correct answer to the question is: 2-Hydroxy propanoic acid
Q.
How much solar flux absorb by earth’s surface is used to drive hydrologic cycle:
1/5th
1/3rd
1/4th
1/2sec
Explanation:
The correct answer to the question is: 1/3rd
Q.
Ncleophilic addition reactions are catalysed__________________?
Acid
Base
None
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Oxidation state +1 for phosphorous is found in___________?
H3PO2
H2P2O7
H3PO3
H3PO4
Explanation:
The correct answer to the question is: H3PO2
Q.
In Dry cell, cathode is made up of_______?
Zinc
ZnCl²
Carbon (Graphite)
MnO²(Pyrolusite)
Explanation:
The correct answer to the question is: Carbon (Graphite)
Q.
Which one of the following is termed as benzul alcohol ?
C6H5CH(OH)2
C6H5COOH
C6H5CH2OH
C6H5OH
Explanation:
The correct answer to the question is: C6H5CH2OH
Q.
Which of the following substances does not give iodoform test ?
acetaldehyde
ethyl alcohol
methyl alcohol
acetone
Explanation:
The correct answer to the question is: methyl alcohol
Q.
The purpose of Smelting an ore is to________?
Reduce it
Oxidize it
Separate volatile impurities
Obtain an alloy
Explanation:
The correct answer to the question is: Reduce it
Q.
On reduction with LiAlH4 ,Ketone gives__________?
Primary Alcohol
Tertiary 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 ?
Heating sod. Salt of Benzoic acid with soda lime
Hydrolysis of benzene sulphonic acid with super heated steam
Chlorobenzene with NaOH at 360°C & 150atm.
Distilling phenol with Zn dust
Explanation:
The correct answer to the question is: Chlorobenzene with NaOH at 360°C & 150atm.
Q.
Bromine can be liberated from KBr solution by the action of _______________?
NaCl
Chlorine
Iodine solution
Ki
Explanation:
The correct answer to the question is: Chlorine
Q.
Methyl radical is ___________?
Sp2 hybrid having 6 electron
Sp hybrid having linear geometry
Sp3 hybrid having 8 electrons
sp2 hybrid having 7 electron
Explanation:
The correct answer to the question is: sp2 hybrid having 7 electron
Q.
Give Electronic configuration of Sodium:
1s2,2s2,2p6,3s1
1s2,2s2,2p6,3s2
1s2,2s2,2p6
None of these
Explanation:
The correct answer to the question is: 1s2,2s2,2p6,3s1
Q.
The most electronegative element among the following is_________________?
N
P
As
Sb
Explanation:
The correct answer to the question is: N
Q.
A theoretical link between quantum mechanics and thermodynamics is_________?
Statistical thermodynamics
Matrix mechanics
Electrchemistry
Soectroscopic analysis
Explanation:
The correct answer to the question is: Statistical thermodynamics
Q.
Which of the following has lowest lattice energy?
LiF
NaCl
KBr
CsI
Explanation:
The correct answer to the question is: CsI
Q.
Ketones and Aldehydes are differentiate by using ______________?
Nitroprusside test
Silver Mirror test
Bendict solution
Fehling solution
Explanation:
The correct answer to the question is: Nitroprusside test
Q.
Nitration of chlorobenzene gives___________________?
m – chloronitrobenzene
o – chloronitrobenzene
p – chloronitrobenzene
A & B
Explanation:
The correct answer to the question is: A & B
Q.
What is the molecular Weight of Nitric acid (HNO3 ) ?
70.012 g/mol
81.011 g/mol
65.012 g/mol
63.012 g/mol
Explanation:
The correct answer to the question is: 63.012 g/mol
Q.
Which of the following will be acidic_____________?
all of the above
1-butyne
propyne
ethyne
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following is soluble in water?
AgI
AgF
AgBr
AgCl
Explanation:
The correct answer to the question is: AgF
Q.
How many electrons are there in benzene to form delocalized electron cloud________________?
4
3
8
6
Explanation:
The correct answer to the question is: 6
Q.
Which of the following is different with respect to physical appearance ?
Arsenic
Phosphorus
Antimony
Bismuth
Explanation:
The correct answer to the question is: Phosphorus
Q.
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
neo-alkane
iso-alkane
branched-alkane
normal-alkane
Explanation:
The correct answer to the question is: iso-alkane
Q.
Molozonide is unstable and changes into ozonide on_________________?
rearrangement
hydrolysis
reduction
oxidation
Explanation:
The correct answer to the question is: rearrangement
Q.
Which one of following is not a property of pure quartz ?
Coloured solid
All of above
Brittle
Hard
Explanation:
The correct answer to the question is: Coloured solid
Q.
SO2 reacts with Cl in sunlight to form__________?
Sulphur dioxide
Sulphuryl chloride
Suphanyl chloride
All of the above
Explanation:
The correct answer to the question is: Sulphuryl chloride
Q.
The IUPAC suffix used for _______ NC group?
Nitrile
Cyanide
Carbylamines
Isocyanides
Explanation:
The correct answer to the question is: Nitrile
Q.
Identify among the following elements that does NOT belong to VIIA group
Br
Cl
F
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____________?
1 to 10
1 to 6
6 to 7
9 to 8
Explanation:
The correct answer to the question is: 1 to 6
Q.
Which of the following is a symmetrical ketone___________________?
2-pentanone
acetone
3 – hexanone
butanone
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:_______?
Sulphur
Chlorine
Fluorine
Bromine
Explanation:
The correct answer to the question is: Sulphur
Q.
Among the halogens the rare element is________________?
Fluorine
Astatine
Chlorine
Iodine
Explanation:
The correct answer to the question is: Astatine
Q.
An organic compound has a triple bond and not double bond. It can be tested by __________?
Bromine water
Ammonical silver nitrate
Fehling solution
Bayer’s reagent
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
The system which exchange only energy with its surroundings is called______________?
closed system
Open system
All of the above
Isolated system
Explanation:
The correct answer to the question is: closed system
Q.
In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
Four times
Same
Half
Double
Explanation:
The correct answer to the question is: Double
Q.
Cyclone collector is used for minimizing:____________-?
Air pollution
Sound pollution
Soil pollution
Water pollution
Explanation:
The correct answer to the question is: Air pollution
Q.
Which of the following noble gases is not present in atmosphere?
Argon
Xenon
Radon
Helium
Explanation:
The correct answer to the question is: Radon
Q.
Which of the following is not use of compounds of Fluorine________________?
Sodium fluoroacetate is a rat poison
Cu F2 is used in ceramic industry
None of the above
SbF3 is used for manufacture of pottery
Explanation:
The correct answer to the question is: None of the above
Q.
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
To remove air bubbles from molten metal
To produce alloy
As nitrometer
As insulator
Explanation:
The correct answer to the question is: To remove air bubbles from molten metal
Q.
Gypsum is applied to the soil as a source of________________?
Ca and S
Ca and P
we could not apply
S and P
Explanation:
The correct answer to the question is: Ca and S
Q.
Which of the following is more acidic in nature?
Aniline
Phenol
Cresol
Benzene
Explanation:
The correct answer to the question is: Phenol
Q.
The number of lone pairs in XeOF4 is_________?
1
3
2
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:____________?
Cosmic rays
Free radicals
UV -rays
Nitrogen oxides
Explanation:
The correct answer to the question is: UV -rays
Q.
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
C6H12O6
C6H18O3
C2H6O
C2H5O
Explanation:
The correct answer to the question is: C6H18O3
Q.
Biodegradable pollutant is:_____________?
DDT
mercury salt
Aluminum foil
Domestic waste
Explanation:
The correct answer to the question is: Domestic waste
Q.
Azimuthal quantum number defines___________?
Spin of an electron
e/m ratio of an electron
Magnetic momentum of an electron
Angular momentum of an electron
Explanation:
The correct answer to the question is: Angular momentum of an electron
Q.
The product On the oxidation of 2°Alcohol is ________?
Ketone
Ester
Aldehyde
Carboxylic acid
Explanation:
The correct answer to the question is: Ketone
Q.
Reading of a Barometer going down is an indication of:___________?
Snow
Rainfall
Intense heat
Storm
Explanation:
The correct answer to the question is: Rainfall
Q.
Gypsum is______?
CaSO4.1/2H2O
CaSO4,2H2O
CaSO4.3H2O
CaSO4
Explanation:
The correct answer to the question is: CaSO4,2H2O
Q.
BeCl2 has the hybrid orbitaks of type_______?
Sp2
Sp
dsp2
Sp3
Explanation:
The correct answer to the question is: Sp
Q.
Those aliphatic hydrocarbons which contain carbon to carbon single covalent bond in the chain are called ___________?
Alkanes
Alkenes
a & c
Alkynes
Explanation:
The correct answer to the question is: Alkanes
Q.
Cassiterite is an ore of_______?
Mn
Sb
Sn
Ni
Explanation:
The correct answer to the question is: Sn
Q.
Identify the Molecular mass for Glucose (C6H12O6) among the following.
180amu
188amu
98amu
190amu
Explanation:
The correct answer to the question is: 180amu
Q.
Mass spectroscopy mainly tells about ____________?
Mass
None of These
Isotopes
e/m ratio
Explanation:
The correct answer to the question is: e/m ratio
Q.
Absolute alcohol is obtained when rectified spirit is treated with__________________?
Ca(OH)2
CaO
CaCO3
CaCl2
Explanation:
The correct answer to the question is: CaO
Q.
The process of aluminium extraction is called__________________?
Contact process
Thermite process
Hall process
Haber process
Explanation:
The correct answer to the question is: Hall process
Q.
Ozonolysis of benzene produces___________________?
Glycol
Glyoxal
Both B & C
Vicinal diol
Explanation:
The correct answer to the question is: Glyoxal
Q.
Atom is the smallest particall which is_________?
Indivisible
Non of these
Both
Divisible
Explanation:
The correct answer to the question is: Indivisible
Q.
Kipps Apparatus is used to prepare_________?
H²S
Cl²
Cu
NaOH
Explanation:
The correct answer to the question is: H²S
Q.
Which of the following haloalkane is hydrolysed by SN1 mechanism?
CH3Br
(CH3)3CBr
CH3CH2CH2Br
CH3CH2Br
Explanation:
The correct answer to the question is: (CH3)3CBr
Q.
Effective volume is usually taken for ____________ ?
2 moles of gas
3moles of gas
5 moles of gas
1 mole 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
Na2B4O7.2H2O
Na2B4O7.4H2O
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?
1.67 g/L
None of the above
1.68 g/L
1.65 g/L
Explanation:
The correct answer to the question is: 1.68 g/L
Q.
Which of the following element has the maximum electron affinity_____?
Br
I
F
Cl
Explanation:
The correct answer to the question is: Cl
Q.
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
52%
8%
50%
60%
Explanation:
The correct answer to the question is: 52%
Q.
During Electrolysis of Water the product @cathode obtained is ___________?
Hydrogen & Carbon monoxide
Oxygen Gas & Water
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______.
Bosch Process
liquification process
Thermal decomposition
Fragmentation
Explanation:
The correct answer to the question is: Bosch Process
Q.
Chemistry is given from ……language ?
Greek
Arabic
Latin
None of these
Explanation:
The correct answer to the question is: Greek
Q.
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
OH-
H2O
O
H+
Explanation:
The correct answer to the question is: H2O
Q.
When limestone reacts with water, which gas is released?
Hydrogen
Carbon Dioxide
Nitrogen
Oxygen
Explanation:
The correct answer to the question is: Carbon Dioxide
Q.
Which one of the following results in the discovery of proton.
Cathode rays
X-rays
Canal rays
Alpha rays
Explanation:
The correct answer to the question is: Canal rays
Q.
Downs cell is used to prepare_________________?
Sodium hydroxide
Sodium carbonate
Sodium bicarbonate
Sodium metal
Explanation:
The correct answer to the question is: Sodium metal
Q.
Aniline is a derivative of benzene which contains__________________?
Amino group
Amide group
Nitro group
Imino group
Explanation:
The correct answer to the question is: Amino group
Q.
Which of the elements show passivity when treated with conc. HNO3?
Fe
All of the above
A
Cr
Explanation:
The correct answer to the question is: All of the above
Q.
Special features of borate glass is that it is_________________?
Heat resistant
Low melting
Used to prepare chemical garden
Green in colour
Explanation:
The correct answer to the question is: Heat resistant
Q.
The carbon atom of carbonyl group is__________________?
sp hybridized
dsp2 hybridized
sp2 hybridized
cp3 hybridized
Explanation:
The correct answer to the question is: sp2 hybridized
Q.
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
Tertiary alcohol
All of above
Secondary alcohol
Primary alcohol
Explanation:
The correct answer to the question is: Tertiary alcohol
Q.
Example of linear polymer is ______________?
High density polythene
PVC
Low density polythene
both A and C
Explanation:
The correct answer to the question is: both A and C
Q.
Dehalogenation of ethyl tetrahalide will give____________________?
all of the above are possible
ethyne
ethyl halide
ethene
Explanation:
The correct answer to the question is: ethyne
Q.
The maximum amount of product obtained by balanced chemical equation is called as __________?
Actual yield
NOT
Practical yield
Theoretical yield
Explanation:
The correct answer to the question is: Theoretical yield
Q.
K2Cr2O7/H2SO4 generate____________________?
Hydrogen
Oxygen
Nascent hydrogen[H]
Nascent oxygen[O]
Explanation:
The correct answer to the question is: Nascent oxygen[O]
Q.
The science of fermentation is called _______ ?
Zymurgy
Zymology
Zygology
Zootaxy
Explanation:
The correct answer to the question is: Zymology
Q.
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
ketone
ethylene epoxide
formaldehyde
both A & C
Explanation:
The correct answer to the question is: both A & C
Q.
What is the mass of one mole of Iodine?
127g
74g
254g
53g
Explanation:
The correct answer to the question is: 254g
Q.
The formula C6H5-CO-CH3 represents_______ ?
Acetic acid
Acetone
Acetophenone
Phenyl acetate
Explanation:
The correct answer to the question is: Acetophenone
Q.
Which of the following is used with milk of lime to kill fungus and molds?
Copper Sulfate
Chlorine
Nitric acid
Silver nitrate
Explanation:
The correct answer to the question is: Copper Sulfate
Q.
The stationary and mobile phases in paper chromatography are____________?
Liquid/gas
Liquid/liquid
Solid/liquid
Liquid/solid
Explanation:
The correct answer to the question is: Solid/liquid
Q.
R-Mg-Br is called___________________?
Alkyl
Both A & B
Metallic alkyl halide
Grignard reagent
Explanation:
The correct answer to the question is: Both A & B
Q.
Benzene does not undergo___________________?
Addition reaction
Oxidation reactions
Substitution reaction
Polymerization reactions
Explanation:
The correct answer to the question is: Polymerization reactions
Q.
When alcohol reacts with phosphorous halides it geive____________________?
alkanes
alkynes
alkyl amine
alkyl halides
Explanation:
The correct answer to the question is: alkyl halides
Q.
The bond length of C=C is___________?
1.20A°
1.54A°
1.34A°
1.68A°
Explanation:
The correct answer to the question is: 1.68A°
Q.
Universe is almost 70% made up of __________?
Hydrogen
Helium
Chlorine
Carbon
Explanation:
The correct answer to the question is: Hydrogen
Q.
Which of the following is unit of Viscosity?
Torr
Poise
Hertz
Decibell
Explanation:
The correct answer to the question is: Poise
Q.
Fehling solution react with HCHO to form precipitate of _____________?
Red colour
White colour
Blue 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 ____________?
Thio alcohols
Aldehydes
Amines
Ethers
Explanation:
The correct answer to the question is: Aldehydes
Q.
What is the formula of Copper Sulfate?
CuSO3.5H2O
CuSO4.5H2O
CuSO4.4H2O
CuSO3.4H2O
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
Vander Waals forces are stronger in_______________?
I2
Br2
Cl2
F2
Explanation:
The correct answer to the question is: I2
Q.
Element that have same number of neutrons are called__________?
isotope
isobar
None of these
isotone
Explanation:
The correct answer to the question is: isotone
Q.
Which one of the following compound does not have – OH group___________________?
glycerol
ethyl acetate
ethylene glycol
picric acid
Explanation:
The correct answer to the question is: ethyl acetate
Q.
The halogen having highest electron affinity is_____________________?
Fluorine
Bromine
Chlorine
Iodine
Explanation:
The correct answer to the question is: Chlorine
Q.
The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
Zn / HCI
SOCl2 / Pyridine
PCI3
PCI5
Explanation:
The correct answer to the question is: SOCl2 / Pyridine
Q.
The deliquescence is a property in which a solid____________________?
Absorbs moisture and remains solid
Absorbs moisture and turns to liquid form
Increases the number of water of crystallization
Loses water of crystallization
Explanation:
The correct answer to the question is: Absorbs moisture and turns to liquid form
Q.
The general formula for alkenes is:______________?
CnH2n+1
CnH2n+2
CnH2n
CnH2n-2
Explanation:
The correct answer to the question is: CnH2n
Q.
Oxalate ion behaves as a ________ ligand.
Bidentate
Tridentate
Hexadentate
Unidentate
Explanation:
The correct answer to the question is: Bidentate
Q.
Clemmensens reduction infolves the reduction of___________________?
ketone
all of the above
alkane
aldehyde
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following does not contain phosphorus ?
Steel
Nerves
Bone
Yolk of egg
Explanation:
The correct answer to the question is: Steel
Q.
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
Carbon=0, Oxygen= -1
Carbon= -1, Oxygen= +1
Carbon=0, Oxygen=0
Carbon= +1, Oxygen= -1
Explanation:
The correct answer to the question is: Carbon= -1, Oxygen= +1
Q.
For the generation of biogas, the materials commonly used are__________?
Forest residues
Aquatic plants
None of these
Animal wastes
Explanation:
The correct answer to the question is: Animal wastes
Q.
Electrolysis of dilute solution of NaCl results at the anode_______________?
hydrogen
chlorine
sodium
oxygen
Explanation:
The correct answer to the question is: oxygen
Q.
The Boiling Point of Ethyl Alcohol is_________?
73°C
78°C
58°C
56°C
Explanation:
The correct answer to the question is: 78°C
Q.
Nitrates of which pair of elements give different products on thermal decomposition ?
Li Na
Na K
Li Ca
Mg Ca
Explanation:
The correct answer to the question is: Li Na
Q.
Example of copolymers is _____________?
Orlon
Polyethylene
PVC
nylon 6-6
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
None of these
Nitrogen tank
Hydrogen tank
Oxygen tank
Explanation:
The correct answer to the question is: Oxygen tank
Q.
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
propane
propanal
propanoic acid
propanol
Explanation:
The correct answer to the question is: propanoic acid
Q.
Methanol can be obtained from_________________?
water gas
methane
all
destructive distillation of wood
Explanation:
The correct answer to the question is: all
Q.
An acid-Base Reaction is always a/an __________?
Exothermic
Fusion
Fission
Endothermic
Explanation:
The correct answer to the question is: Exothermic
Q.
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Boyle’s law
Charles’ Law
Avogadro’s Law
Graham’s Law
Explanation:
The correct answer to the question is: Charles’ Law
Q.
Arsenic oxides are removed by passing through_________________?
Aluminium hydroxide
Ferric hydroxide
Calcium hydroxide
Sodium hydroxide
Explanation:
The correct answer to the question is: Ferric hydroxide
Q.
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
dihydric alcohol
secondary alcohol
primary alcohol
tertiary alcohol
Explanation:
The correct answer to the question is: primary alcohol
Q.
Which compound is also known by the name of carbolic acid ?
C6H5OH
H2CO3
C2H2OH
H3PO3
Explanation:
The correct answer to the question is: C6H5OH
Q.
The blotting paper helps observe liquid by__________?
Viscosity
Capillary Action
Surface Action
Boldness
Explanation:
The correct answer to the question is: Capillary Action
Q.
Which group contains elements that exist as monoatomic molecule?
2
14
1
18
Explanation:
The correct answer to the question is: 18
Q.
The ether used in Wurtz synthesis is__________________?
dry
acidic
basic
aqueous
Explanation:
The correct answer to the question is: dry
Q.
Bosch Process involves _______?
Crackling
Reduction
Isomerization
Oxidation
Explanation:
The correct answer to the question is: Oxidation
Q.
Value of normal atmospheric pressure at sea level at 0°C is______?
All of these
76cm of Hg
760 Torr
1 atm
Explanation:
The correct answer to the question is: All of these
Q.
d-block elements are also called as __________?
Both B & C
Alkali Metals
Inner Transition
Outer Transition
Explanation:
The correct answer to the question is: Outer Transition
Q.
The carbon-carbon bond strength is maximum in__________?
Benzene
Cyclohexane
CH2=CH2
CH3CH3
Explanation:
The correct answer to the question is: CH3CH3
Q.
The criteria for aromaticity is presence of_________?
Cyclic structure
Presence of 4n+2π electrons
Unsaturations
Presence of 4nπ electrons
Explanation:
The correct answer to the question is: Presence of 4n+2π electrons
Q.
Which set of quantum numbers is not allowed?
n=2,l=1,m1=-1,ms=+1/2
n=2,l=1,m1=0,ms=+1/2
n=2,l=2,m1=1,ms=-1/2
n=2,l=0,m1=0,ms=-1/2
Explanation:
The correct answer to the question is: n=2,l=2,m1=1,ms=-1/2
Q.
Which of the following orbitals has maximum penetration effect?
d
f
S
P
Explanation:
The correct answer to the question is: S
Q.
Which one of the following species is not an electrophile ?
BF3
H+
NH3
Br+
Explanation:
The correct answer to the question is: NH3
Q.
Compounds of nitrogen and phosphorus are mostly________________?
all varieties are possible
ionic
covalent
polar
Explanation:
The correct answer to the question is: covalent
Q.
Which one of the following is not the use of graphite ?
Abrasive
Lubricant
Lead pencils
Electrode of electrolytic cell
Explanation:
The correct answer to the question is: Abrasive
Q.
Which one of the following acids is present in lemon juice ?
Benzoic acid
Citric acid
Oxalic acid
Tartaric acid
Explanation:
The correct answer to the question is: Citric acid
Q.
What is chemical symbol for Tungsten?
Z
Tn
T
W
Explanation:
The correct answer to the question is: W
Q.
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
steric hindrance
alkyl groups are electron donating
none
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Shiff’s reagent gives pink color with ____________?
Acetone
Methyl acetate
Acetaldehyde
Acetic acid
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
0.6N HSO
4.6 gram of CHOH
1.8 gram of HO
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
Refining
Reforming
Explanation:
The correct answer to the question is: Reforming
Q.
Actinides are the elements with atomic number from:
89 to 103
101 to 115
36 to 43
97 to 104
Explanation:
The correct answer to the question is: 89 to 103
Q.
Which one of the following compounds usually smells like garlic ?
P2O5
H3PO3
All have same smell
P2O3
Explanation:
The correct answer to the question is: P2O3
Q.
What is the molecular formula of Benzenetriozonide ?
C6H6O9
C6H5O8
C6H6O6
C6H5O9
Explanation:
The correct answer to the question is: C6H6O9
Q.
Addition of 2% gypsum in cement________________?
all of the above
Triggers hydration
Triggers hydrolysis
Prevents rapid hardening
Explanation:
The correct answer to the question is: Prevents rapid hardening
Q.
Neoprene is _______________?
synthetic rubber
All of the above
Vulcanized rubber
Natural rubber
Explanation:
The correct answer to the question is: synthetic rubber
Q.
SO3 is not absorbed in water directly because__________________?
Dilute acid is produced
It is insoluble in water
All of above
Reaction is exothermic
Explanation:
The correct answer to the question is: Reaction is exothermic
Q.
Sum of protons and neutrons in an atom gives off _________ ?
Both A and B
Nucleon numbera
Atomic number
Mass number
Explanation:
The correct answer to the question is: Both A and B
Q.
For the reaction 2HI ____________> H2+ I2
Kp ≤ kc
Kp > kc
Kp= kc
Kc > kp
Explanation:
The correct answer to the question is: Kp= kc
Q.
In SI base units, 1 Bq is equal to __________ ?
1 disintegration per second
1.5 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 forces of attractions become stronger
High energy molecules continuously leaving the surface of liquid
Extra heat is spread in the air
The vapour pressure of the boiling liquid becomes greater than the external pressure
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
Neon
Methane
Explanation:
The correct answer to the question is: Argon
Q.
Which is methyl cyanide_________________?
CH3CN
CH2 = CH – CN
CH3NH2
CH3NO2
Explanation:
The correct answer to the question is: CH3CN
Q.
Carboxylic acid on reduction with HI / phosphorous yields_________________?
alkane
alcohols
aldehydes
ketones
Explanation:
The correct answer to the question is: alkane
Q.
Cyclopentene is a _________?
None of These
Aliphatic
Aromatic
Alicyclic
Explanation:
The correct answer to the question is: Alicyclic
Q.
Atoms of all the elements always contain in nucleus:
Proton
Proton and neutron
Neutron and electron
Neutron
Explanation:
The correct answer to the question is: Proton
Q.
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
1 – hexanol
cyclohexane
cyclohexanol
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 __________?
Denitrification
None of these
Fermentation
Nitrification
Explanation:
The correct answer to the question is: Nitrification
Q.
Coinage metals are actually_________?
Transition metals
Alkali metals
Alkaline earth metals
Halogens
Explanation:
The correct answer to the question is: Transition metals
Q.
What is the chemical symbol of “Potassium”?
Po
K
P
Pt
Explanation:
The correct answer to the question is: K
Q.
Vulcanized rubber is an example of ______________?
Synthetic polymers
None of These
Natural polymers
semisynthetic polymers
Explanation:
The correct answer to the question is: semisynthetic polymers
Q.
The second nuclear weapons used in warfare over Nagasaki, Japan, contain energy equal about of TNT?
20 kilotons
30 kilotons
1.5 kilotons
25 kilotons
Explanation:
The correct answer to the question is: 20 kilotons
Q.
Process used to separate insoluble particles from liquids is ___________ ?
Extraction
Sieving
Filtration
Drying
Explanation:
The correct answer to the question is: Filtration
Q.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
De-excitation of electrons from higher energy levels to low energy level
Smaller electronegativity of alkali metals
Excitation of electrons from low energy levels to higher energy levels
Smaller ionic radius of these metals
Explanation:
The correct answer to the question is: De-excitation of electrons from higher energy levels to low energy level
Q.
Boron is non-netal whereas A1 is metal. It is due to_______________________?
Both A and B
Small size
No authorized justification yet
High nuclear charge
Explanation:
The correct answer to the question is: Both A and B
Q.
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
546 °C
200°C
273 K
546 K
Explanation:
The correct answer to the question is: 546 K
Q.
Oxygen and sulphur resemble in all except________________?
Show same oxidation state
Show allotropy
Polymeric
Electronic conviguration of valence shell electrons
Explanation:
The correct answer to the question is: Show same oxidation state
Q.
Phosphoric acid is a weak acid and its basicity is____________________?
3
2
zero
1
Explanation:
The correct answer to the question is: 3
Q.
Viscosity of a liquid________by increasing temperature?
None
Decreases
Increases
Remains same
Explanation:
The correct answer to the question is: Decreases
Q.
Presence of nitrogen in organic compounds is tested as__________?
NO
CN‾
NH3
Nitrogen gas
Explanation:
The correct answer to the question is: CN‾
Q.
Water molecule is________?
Angular
Pyramidal
Triangular planer
V-shaped
Explanation:
The correct answer to the question is: V-shaped
Q.
Which of the following method is used to separate Hydrogen gas from water Gas?
Cyber Twinkling process
Palladium 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?
Cd , Pb
Hg, Pb
Zn, Mn
As, CD
Explanation:
The correct answer to the question is: Hg, Pb
Q.
The petrol having octane number 80 has ____________?
20% n- heptane + 80% iso-octane
20% n- heptane + 80% n-octane
80% n-heptane + 20% n- octane
80% n- heptane + 20% iso-octane
Explanation:
The correct answer to the question is: 20% n- heptane + 80% iso-octane
Q.
Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
CHCHCHO + CHCOOH
CHCOOH + CO
CHCHCHO + CHCHO
CHCHCOOH + CHCOOH
Explanation:
The correct answer to the question is: CHCHCOOH + CHCOOH
Q.
Carnalite has chemical formula__________________?
CaCO3.MgCO3
KCI
Na2B4O7.10H2O
KCI.MgCl2.6H2O
Explanation:
The correct answer to the question is: KCI.MgCl2.6H2O
Q.
Allotropic form of phosphorus that is poisonous is___________________?
Red
Violet
Black
White
Explanation:
The correct answer to the question is: White
Q.
Dry distillation of calcium acetate results in the formation of_________________?
acetaldehyde
acetone
methane
formaldehyde
Explanation:
The correct answer to the question is: acetone
Q.
The quality of petrol is improved by ____________?
Cracking
Reforming
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
Ethylene only
Acetaldehyde only
Propionaldehyde and Formaldehyde
Explanation:
The correct answer to the question is: Propionaldehyde and Formaldehyde
Q.
Alkenes are produced from dehalogenation of________________?
trihalo alkane
vicinal trihalo alkane
dihalo alkane
vicinal dihalo alkane
Explanation:
The correct answer to the question is: vicinal dihalo alkane
Q.
The hybridization of nitrogen atom in pyridine is_______?
Sp3
Sp
It is not hybridized
Sp2
Explanation:
The correct answer to the question is: Sp2
Q.
Ammonia may be prepared by heating ammonium chloride with_______________?
NaCl
Water
Aqueous sodium hydroxide
H2SO4
Explanation:
The correct answer to the question is: Aqueous sodium hydroxide
Q.
The type of hybridisation of boron in diborane is______?
Sp2- hybridisation
Sp- hybridisation
Sp3d2- hybridisation
Sp3- hybridisation
Explanation:
The correct answer to the question is: Sp- hybridisation
Q.
The gas used in manufacturing of urea fertilizer__________________?
C2H2
CH4
C2H6
C2H4
Explanation:
The correct answer to the question is: CH4
Q.
What is the color of copper sulfate crystalline?
White
Green
Blue
Brown
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 the halogens have electronic conviguration ns2p5
All are non-metals
They have high electron attinity and ionization energy
Explanation:
The correct answer to the question is: All the halogens react with noble gases to form their halides
Q.
The shielding Effect across the period __________?
Decreases
None of them
Increases
Remains Same
Explanation:
The correct answer to the question is: Remains Same
Q.
The pH of milk is_______?
8
12
9
6.5-7
Explanation:
The correct answer to the question is: 6.5-7
Q.
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
900⁰C
700⁰C
1300⁰C
500⁰C
Explanation:
The correct answer to the question is: 700⁰C
Q.
The number of moles are present in 9.5g of CS2?
0.25
None of These
0.125
1.5
Explanation:
The correct answer to the question is: 0.125
Q.
Which of the following has acidic hydrogen?
Ethene
Ethane
Benzene
Ethyne
Explanation:
The correct answer to the question is: Ethyne
Q.
Which of following is known as Blue Vitriol or Blue Stone?
K2Cr2O7
K2CrO4
CuSO4.5H2O
AgNO3
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
The given dissociation constant (Ka) value 1.3×10-10 is of_________________?
Water
Alcohol
Phenol
Acetic acid
Explanation:
The correct answer to the question is: Phenol
Q.
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
all above
fats and proteins
proteins and oild
fats and oils
Explanation:
The correct answer to the question is: fats and oils
Q.
Which of the following gases is used for welding?
Methane
Acetylene
Ethene
Ethane
Explanation:
The correct answer to the question is: Acetylene
Q.
Tetraethyl lead is used as______?
Fire Extinguisher
Petrol Additive
Pain Killer
Mosquito Repellent
Explanation:
The correct answer to the question is: Petrol Additive
Q.
Oobleck is the mixture of _________?
Baking Soda and Vinegar
Cement and Water
Gram Flour and Water
Cornstarch and Water
Explanation:
The correct answer to the question is: Cornstarch and Water
Q.
Which of the following represents the correct electronic configuration of VII A group elements in the ground state ?
ns2p5
ns2p6
ns2p4
ns2p2
Explanation:
The correct answer to the question is: ns2p5
Q.
The volume strength of 1.5 N H2O2 solution is_______?
8.8
8.4
5.2
4.8
Explanation:
The correct answer to the question is: 8.4
Q.
Aldehyde and ketone have same general formula for homologous series_________________?
CnH2nOn+1
CnH2nO
CnH2n
CnH2nO2n
Explanation:
The correct answer to the question is: CnH2nO
Q.
The anhydride of HCIO4 is_________________?
Cl2O6
Cl2O
ClO2
Cl2O7
Explanation:
The correct answer to the question is: Cl2O7
Q.
Bleaching powder is not used for bleaching________________?
Linen
Cotton
Paper pulb
Costly fabrics
Explanation:
The correct answer to the question is: Costly fabrics
Q.
_____________ surfactants perform well over a wide range water hardness and PH?
Nonionic
Neutral
Cationic
Anionic
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__________?
6P
P/3
3P
3P/T
Explanation:
The correct answer to the question is: P/3
Q.
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
Nitrates
Lime
Zeolites
Sulphonides
Explanation:
The correct answer to the question is: Zeolites
Q.
Metal are highly ___________ ?
Electropositive
Neutral
Both of these
Electronegativity
Explanation:
The correct answer to the question is: Electropositive
Q.
The oxidation of secondary alcohol gives ?
alkane
ketone
carboxylic acid
Acetylene
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following is the most Viscous?
Water
Spirit
Glycerine
Honey
Explanation:
The correct answer to the question is: Honey
Q.
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
Both A and B
H2SO4
PCI5
P2O5
Explanation:
The correct answer to the question is: Both A and B
Q.
Carbon,Diamond and Graphite are together called:___________?
Isotopes
Isomorphs
Allotrope
Isomers
Explanation:
The correct answer to the question is: Allotrope
Q.
Position of double bond in an organic compound is determined by ___________?
Reduction
Oxidation
Ozonolysis
Hydrogenation
Explanation:
The correct answer to the question is: Ozonolysis
Q.
Which is used for artificial ripening of fruit ?
ethyne
methane
ethene
ethane
Explanation:
The correct answer to the question is: ethene
Q.
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
Sodium benzoate
acetylene
Benzene sulphonic acid
N-hexane
Explanation:
The correct answer to the question is: N-hexane
Q.
The compound (CH3)3COH according to IUPAC is known as ___________?
1,1- Diethylethanol
2,2-Dimethyl-propanol
Tert-Butanol
Tert Alcohol
Explanation:
The correct answer to the question is: 2,2-Dimethyl-propanol
Q.
Which one of the following is a bridge element?
Cl
P
K
Be
Explanation:
The correct answer to the question is: Be
Q.
The main contributor to toxicity of detergent:
Na-Silicate solution
K-Chloride solution
Na-Chloride solution
Na-sulphate solution
Explanation:
The correct answer to the question is: Na-Silicate solution
Q.
In Periods from Left to right Electronegativity will: _________?
none of these
constant
increase
decrease
Explanation:
The correct answer to the question is: increase
Q.
Formula of Galena is________?
HgS
AS2S3
FeS2
PbS
Explanation:
The correct answer to the question is: PbS
Q.
Glycine is the name of an amino acid because___________________?
Bitter taste
Green colour
Shining appearance
Sweet taste
Explanation:
The correct answer to the question is: Sweet taste
Q.
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
Double displacement reaction
Disproportionation reaction
Reduction reaction
Displacement reaction
Explanation:
The correct answer to the question is: Disproportionation reaction
Q.
Which one of the following statement is correct for urea ?
it is an inorganic water soluble compound
it is a synthetic fertilizer
it provides micronutrients to the plants
it is a natural fertilizer
Explanation:
The correct answer to the question is: it is a synthetic fertilizer
Q.
What is the order of kinetics in the SN1 mechanism ?
Third
Second
Zero
First
Explanation:
The correct answer to the question is: First
Q.
Reacting bromine with benzene in the presence of sunlight will result in_______________?
The rupturing of benzene ring
Addition reaction
Substitution reaction
No-reaction
Explanation:
The correct answer to the question is: Addition reaction
Q.
What is the molecular weight of Ammonia (NH3) ________ ?
27.033 g/mol
19.031 g/mol
17.031 g/mol
18.031 g/mol
Explanation:
The correct answer to the question is: 17.031 g/mol
Q.
Vinylacetylene combines with HCI to form___________________?
divinyl acetylene
polyacetylene
chloroprene
benzene
Explanation:
The correct answer to the question is: chloroprene
Q.
Ethene is the first member of __________?
Aromatic hydrocarbon
Alkenes Family
None of These
Saturated hydrocarbon
Explanation:
The correct answer to the question is: Alkenes Family
Q.
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
neutralization
esterification
hydrolysis
saponification
Explanation:
The correct answer to the question is: esterification
Q.
Percentage of lead in lead pencil is________?
80
70
20
Zero
Explanation:
The correct answer to the question is: Zero
Q.
Indicate the correct statement__________________?
Cl2 is the strongest oxidizing agent
I2 is a volatile solid
Br2 is more reactive than Cl2
Cl2 is insoluble in water
Explanation:
The correct answer to the question is: I2 is a volatile solid
Q.
The most powerful oxidizing agent among the halogens is__________________?
Cl2
I2
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 _________?
Electrolyte
Element
Mixture
Compound
Explanation:
The correct answer to the question is: Mixture
Q.
The valency of Carbon is _________?
2(Divalent)
3(Trivalent)
4(Tetravalent)
1(univalent)
Explanation:
The correct answer to the question is: 4(Tetravalent)
Q.
Ionic solids do not conduct the electrical current because:
Strong covalent bonds are present in their structure
Free electrons are less
Ions don’t have translatory motion
The coordination number of ion is very high
Explanation:
The correct answer to the question is: Ions don’t have translatory motion
Q.
Positron has __________charge.
Neutral
None of them
-ve
+ve
Explanation:
The correct answer to the question is: +ve
Q.
Reactivity due to pi-electrons is present in_________________?
alkane
alkyne
both B & C
alkene
Explanation:
The correct answer to the question is: both B & C
Q.
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
80.4 KJ
135.5 KJ
159.6kJ
110.5 KJ
Explanation:
The correct answer to the question is: 159.6kJ
Q.
When SO2 solution is passed over which of the following it turns green?
H2SO4
SO3
P2O5
K2Cr2O7
Explanation:
The correct answer to the question is: K2Cr2O7
Q.
50% inversion of configuration of molecules take place in a___________________?
E2 – reaction
E1 – reaction
SN2 – reaction
SN1 – reaction
Explanation:
The correct answer to the question is: SN1 – reaction
Q.
What is the molecular formula for Nitric acid ________ ?
HNO3
HN2O2
H2NO4
HNO2
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____________?
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
p-electrons in Ne(Z = 10)
p-electrons in CI(Z = 17)
Explanation:
The correct answer to the question is: p-electrons in CI(Z = 17)
Q.
Crystals of Na2CO3. 10H2O when exposed to air_________________?
Gain water and remain solid
Remains unchanged
Lose 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___________?
He
NH3
H2
CH4
Explanation:
The correct answer to the question is: He
Q.
Charle’s Law was given by Jacques Charles in_______?
1885
1787
1880
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________?
2FeS+3O2——–> 2Fe+ SO2
CaO+ SiO2——> CaSiO3
Fe2O3+ 3CO——–> 2Fe+ 3CO2
FeSiO3———> FeSiO3
Explanation:
The correct answer to the question is: Fe2O3+ 3CO——–> 2Fe+ 3CO2
Q.
Which Oxide of Manganese is amphoteric?
MnO2
Mn2O7
MnO
Mn2O3
Explanation:
The correct answer to the question is: MnO2
Q.
Alum is used by dyers of cloth:
As water purifier
As mordant
Softening of hard water
fire proofing fabrics
Explanation:
The correct answer to the question is: As mordant
Q.
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
Cathode to decay
All of the above
Hydroxide ions to reach anode
Chlorine gas to mix
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)?
8.24
5.24
7.24
6.24
Explanation:
The correct answer to the question is: 8.24
Q.
Which of the following is not a use of silicon ?
Water repellent
Lubricants
Antifreeze
Hydraulic brakes
Explanation:
The correct answer to the question is: Antifreeze
Q.
The absolute value of charge on electron was determined by ________ ?
J.J.Thomson
Chadwick
Rutherford
Robert Millikan
Explanation:
The correct answer to the question is: Robert Millikan
Q.
Calculate % of N in KNO3__________?
18.56%
14.34%
13.86%
None of these
Explanation:
The correct answer to the question is: 13.86%
Q.
Which of the following compounds will react with Tollens reagent ?
CH3-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_______________?
proton
both A & amp; B
H-
H+
Explanation:
The correct answer to the question is: H-
Q.
The molecular formula of Methane gas is___________?
CH
NH
CH
CO
Explanation:
The correct answer to the question is: CH
Q.
The Maximum mass of an atom is present in ___________?
Energy levels
Shell
Nucleus
Orbit
Explanation:
The correct answer to the question is: Nucleus
Q.
The octane number of zero is assigned to____________?
2-methyl octane
iso-octane
3-methyl octane
n-heptane
Explanation:
The correct answer to the question is: n-heptane
Q.
Ethanol and methanol can be distinguished by a__________________?
Iodoform test
Benedicts test
Tollens test
Lucas test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Acidic amino acids have________________?
1 amino and 1 carboxylic groups
2 carboxylic groups and 1 amino group
2 amino groups and 1 carboxylic 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 ______ ?
Rock
Petrol
Fuel
Sediment
Explanation:
The correct answer to the question is: Rock
Q.
Oxidation of primary alcohol gives________________?
ketone
Alkene then – COOH
Aldehyde
Ester
Explanation:
The correct answer to the question is: Aldehyde
Q.
Which one is not a nucleophile ?
H3C+
SCN-
NH3
C2H5O-
Explanation:
The correct answer to the question is: H3C+
Q.
The PH of the 1.3 × 10-4 NH4Cl is__________?
2.886
3.886
4.0
1.3
Explanation:
The correct answer to the question is: 3.886
Q.
Example of cross linked polymer is ____________?
bakelite
Nylon
Polyester
PVC
Explanation:
The correct answer to the question is: bakelite
Q.
The best indicator for titrating HCl with NH4OH is: _________?
litmus
methyl Orange
phenopthalein
phenol red
Explanation:
The correct answer to the question is: methyl Orange
Q.
Oxygen does not react with all except_________________?
Water
Metals
Alkali
Acid
Explanation:
The correct answer to the question is: Metals
Q.
Which of the following is more Basic in nature?
1°Alkyl ammine
3° Alkyl ammine
Ammonia
2° Alkyl ammine
Explanation:
The correct answer to the question is: 3° Alkyl ammine
Q.
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
CO2
C2H4
Xe
CH4
Explanation:
The correct answer to the question is: CO2
Q.
The element of group VIA which is a non-metal is________________?
Se
Te
Po
S
Explanation:
The correct answer to the question is: S
Q.
Which of the following is metasilicic acid ?
H2SnO3
H3SbO4
H2SiO3
H3AsO4
Explanation:
The correct answer to the question is: H2SiO3
Q.
Second ionization potential of alkali metals are very high due to_______________?
ns1 electronic configuration
being s-block elements
inert gas configurations
being metals
Explanation:
The correct answer to the question is: inert gas configurations
Q.
The structure of H2O2 is_______?
Linear
Non- polar
Planar
Spherical
Explanation:
The correct answer to the question is: Non- polar
Q.
Which of the following oxides of iodine is used for quantitative analysis of CO ?
I2O5
I4O2
All are equally useful
I2O4
Explanation:
The correct answer to the question is: I2O5
Q.
Cannizzaros reaction is not given by__________________?
benzaldehyde
formaldehyde
trimethyl acetaldehyde
acetaldehyde
Explanation:
The correct answer to the question is: acetaldehyde
Q.
Which is the strongest acid ?
HCIO3
HCIO4
HCIO2
HCIO
Explanation:
The correct answer to the question is: HCIO4
Q.
In a group, atomic radii increase due to successive increase of _________ ?
Neutron shells
Electronic shells
Proton shells
Nucleus
Explanation:
The correct answer to the question is: Electronic shells
Q.
Which one exhibits aldol condensation____________________?
Cl3CCHO
CH3COCH3
C6H5CHO
HCHO
Explanation:
The correct answer to the question is: CH3COCH3
Q.
The number of ions produced by [Pt(NH3)]Cl2?
3
2
5
4
Explanation:
The correct answer to the question is: 3
Q.
Which electronic configuration corresponds to an element of group IIIA ?
1s2 2s2 2p3
1s2 2s2 2p6 3s2 3p6 4s2 3d1
1s2 2s2 2p4
1s2 2s2 2p6 3s2 3p1
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p1
Q.
The organic acid that can be made from ethanol is_________________?
Citric acid
Formic acid
Acetic acid
Butanoic acid
Explanation:
The correct answer to the question is: Acetic acid
Q.
Atomic mass of an atom is present in the __________?
Orbit
Nucleus
Orbital
Shell
Explanation:
The correct answer to the question is: Nucleus
Q.
Evaporation is_____________?
Endothermic Reaction
Continuous Process
Surface Process
All of these.
Explanation:
The correct answer to the question is: All of these.
Q.
Ketones and aldehydes can be distinguished using ____________?
Bendict solution
Fehling solution
None of These
Tollens reagent
Explanation:
The correct answer to the question is: Tollens reagent
Q.
What is the chemical name of Oil of Vitriol?
Hydrochloric Acid
Nitric Acid
Muriatic Acid
Sulphuric Acid
Explanation:
The correct answer to the question is: Sulphuric Acid
Q.
Ostwald’s dilution law applicable to:
All electrolytes
Strong electrolytes
Weak electrolytes
Non electrolytes
Explanation:
The correct answer to the question is: Weak electrolytes
Q.
The PH of pure water at 25°C, kw=1×10-4____________?
None of above
7
14
Explanation:
The correct answer to the question is: 7
Q.
The Substance which resist in change in PH is called?
Buffer
Neutralization
Active transport
Osmosis
Explanation:
The correct answer to the question is: Buffer
Q.
In borax bead test which compound is formed_________?
Ortho burate
Tetra borate
Double oxide
Meta borate
Explanation:
The correct answer to the question is: Meta borate
Q.
Molecular orbital Theory is also called_________?
Bonding theory
π and σ bonding theory
Band theory
Antibondingtheory
Explanation:
The correct answer to the question is: Antibondingtheory
Q.
In which compound of Xenon the oxidation state of Xenon is + 6?
XeOF2
Na4XeO6
XeOF4
XeF4
Explanation:
The correct answer to the question is: XeOF4
Q.
The discovery of neutron became very late because _______ ?
It is present in nucleus
It does not carry any charge
It does not move
It is a fundamental particle
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+Ni+Cu
Fe+ Cr+Cu
Fe+Cr+Ni
Cu+C+Ni
Explanation:
The correct answer to the question is: Fe+Cr+Ni
Q.
The heaviest subatomic particle among the following is_________?
Proton
Neutron
Electron
All have mass
Explanation:
The correct answer to the question is: Neutron
Q.
The whole universe is made up of almost _______of Hydrogen?
50%
80%
70%
60%
Explanation:
The correct answer to the question is: 70%
Q.
Ethyl chloride with nascent hydrogen produces_________________?
propane
butane
methane
ethane
Explanation:
The correct answer to the question is: ethane
Q.
Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?
Carbon Monoxide Gas
None of them
Both at same time
Hydrogen Gas
Explanation:
The correct answer to the question is: None of them
Q.
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Einstein
Dr.A.Walash
S.E.Manhan
Schwartz
Explanation:
The correct answer to the question is: Schwartz
Q.
When Ammonia is used as a refrigerant in vapour compression cycle?
Both a & b
Cu Tubing used
Material does not effect by refrigerant
Steel tubes used
Explanation:
The correct answer to the question is: Steel tubes used
Q.
The compound C3H4 has a triple bond, which is indicated by its reaction with____________?
Bromine water
Ammonical silver nitrate
Bayer’s reagent
Fehling solution
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
None of These
1864
Explanation:
The correct answer to the question is: 1864
Q.
Quality of petrol is measured by___________?
octane number
Heptane number
Refining
Reforming
Explanation:
The correct answer to the question is: octane number
Q.
Greater the heat of neutralization the acid will be____________?
More weaker
more stronger
None of the above
Not related to acid strength
Explanation:
The correct answer to the question is: more stronger
Q.
The mass of 3.2 moles of ammonia (NH3) gas?
55.4 grams
56.4 grams
54.4 grams
53.4 grams
Explanation:
The correct answer to the question is: 54.4 grams
Q.
I3( Tri-iodine) has shape_________?
Both A and C
Trigonal bipyramidal
Linear
Square bipyramidal
Explanation:
The correct answer to the question is: Linear
Q.
Which one of the following alcohol has greater boiling point___________________?
glycerol
ethylene glaycol
ethanol
methanol
Explanation:
The correct answer to the question is: glycerol
Q.
The preparation of benzene from acetylene can also be said as_________________?
Dehydration
Condensation
Polymerization
Oxidation
Explanation:
The correct answer to the question is: Polymerization
Q.
A elements are named as alkali metals because_______________?
Both A & B
They are found in earth
Their oxides are basic
Their oxide and hydroxides are water soluble
Explanation:
The correct answer to the question is: Both A & B
Q.
The reciprocal of the coefficent of viscosity is called__________?
Fluidity
Specific gravity
Density
Absorbance
Explanation:
The correct answer to the question is: Fluidity
Q.
Carbon in wrought iron is present as_________?
Graphite
Partly as iron carbide and partly as graphite
Iron carbide
Silicon carbide
Explanation:
The correct answer to the question is: Iron carbide
Q.
Which alkyl halide has the highest reactivity for a particular alkyl group ?
R-Br
R-I
R-C
R-F
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
Be+³
Li+²
H
Explanation:
The correct answer to the question is: Be+³
Q.
The reaction of Lucas reagent is the fastest with_________?
(CH3)3COH
CH3(CH2)OH
CH3CH2OH
(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?
Desalination
Deliquescence
Efflorescence
Dehydrogenation
Explanation:
The correct answer to the question is: Deliquescence
Q.
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
C5H10
C3H6
C2H4
C4H8
Explanation:
The correct answer to the question is: C4H8
Q.
Z number for chlorine is __________?
35.5
21
17
Explanation:
The correct answer to the question is: 17
Q.
Hydrocarbon is formed when Grignard reagent is treated with___________?
None of the above
H2O
CH3OH
Both a and b
Explanation:
The correct answer to the question is: H2O
Q.
Substance which is found in dried up lakes of Tibet and California is_______________?
Boric acid
Tincal
Calcium carbonate
Colemanite
Explanation:
The correct answer to the question is: Tincal
Q.
Electronic Configuration of Calcium (Ca) atom may be written as________?
Ne, 4p2
Ne, 4s2
Ar, 4s2
Kr,4p2
Explanation:
The correct answer to the question is: Ar, 4s2
Q.
Which of the following will decompose to produce litharge_________________?
All of the above
Pb2O
PbO2
Pb3O4
Explanation:
The correct answer to the question is: Pb3O4
Q.
The phenomenon of negative catalysis is also known as:
Self catalysis
auto catalysis
Enzyme catalysis
inhibition
Explanation:
The correct answer to the question is: inhibition
Q.
Which of the following is not a use of formaldehyde ?
in making acetic acid
in making medicine urotropine
in making throat lozenges
in silvery mirror
Explanation:
The correct answer to the question is: in making acetic acid
Q.
Upto ___________________ C atoms alkanes are gases?
4
3
6
2
Explanation:
The correct answer to the question is: 4
Q.
When the radiation of light is passed through a prism, it undergoes __________?
interference
diffraction
refraction
reflection
Explanation:
The correct answer to the question is: refraction
Q.
What is the mass percent of silver in silver notrate, AgNO3?
61.5%
64.5%
65.6%
63.5%
Explanation:
The correct answer to the question is: 63.5%
Q.
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
CH
CH
SO
SO
Explanation:
The correct answer to the question is: SO
Q.
Nucleus of an atom was discovered by___________?
J J Thomson
James Chadwick
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___________________?
nitration
halogenation
sulphonation
amination
Explanation:
The correct answer to the question is: nitration
Q.
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
Gas chromatography
Extraction
Column chromatography
Distillation
Explanation:
The correct answer to the question is: Column chromatography
Q.
Which metal is used as a reducing agent in Smelting______?
Zn
C
Cu
Al
Explanation:
The correct answer to the question is: C
Q.
The molar mass of an organic acids is determined by____________?
Victor Meyer’s method
Volumetric method
Osmosis method
Depression of freezing point
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 a nucleophilic carbon & a good leaving group
they have an electrophilic carbon
they have an electrophilic carbon & a good leaving group
they have an electrophilic carbon & a bad leaving group
Explanation:
The correct answer to the question is: they have an electrophilic carbon & a good leaving group
Q.
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
89%
75%
73%
81%
Explanation:
The correct answer to the question is: 73%
Q.
Methyl alcohol on oxidation with acidified K2Cr2O7 gives__________?
CH3COCH3
HCOOH
CH3CHO
CH3COOH
Explanation:
The correct answer to the question is: HCOOH
Q.
Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C.
<2.6%
27%
37%
26%
Explanation:
The correct answer to the question is: 37%
Q.
Tincal is a mineral of___________________?
B
C
A1
Si
Explanation:
The correct answer to the question is: B
Q.
Which ion will have maximum value of heat of hydration ?
Cs+
A1+3
Mg+2
Ba+
Explanation:
The correct answer to the question is: A1+3
Q.
Which is artificial manmade fiber?
None of these
Rayon
Boron
Saffron
Explanation:
The correct answer to the question is: Rayon
Q.
Acetylene gives:
Red precipitate with both the reagents
White precipitate with both the reagents
White precipitate with CuCl and red precipitate with AgNO
White precipitate with AgNO and red precipitate with CuCl
Explanation:
The correct answer to the question is: White precipitate with AgNO and red precipitate with CuCl
Q.
Alkanes are also known as________________?
paraffins
both A & C
unsaturated hydrocarbon
saturated hydrocarbon
Explanation:
The correct answer to the question is: paraffins
Q.
Which element is necessary for normal leaf development ?
Si
Ba
Mg
Ca
Explanation:
The correct answer to the question is: Ca
Q.
Isotopes differs in______________________?
chemical properties
arrangement of electrons in orbitals
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__________?
Flurocarbon
Carbon monoxide
Methane
C2H2
Explanation:
The correct answer to the question is: Carbon monoxide
Q.
Example of ‘globular’ proteins is __________ ?
Enzymes
Primary protein
Peptide
Secondary proteins
Explanation:
The correct answer to the question is: Enzymes
Q.
The heat energy produced when the human body metabolises 1 gram of fat is__________?
30 KJ
29 KJ
39 KJ
1 KJ
Explanation:
The correct answer to the question is: 39 KJ
Q.
The chemical symbol for silver is __________?
At
Ag
Sv
Au
Explanation:
The correct answer to the question is: Ag
Q.
The process in which no heat enters or leave the system known as _____________?
Isochoric
adiabatic
Isothermal
Isobaric
Explanation:
The correct answer to the question is: adiabatic
Q.
Hookworm is a parasitic worm that infects ______?
liver
large intestine
lungs
small intestine
Explanation:
The correct answer to the question is: small intestine
Q.
In isothermal process?
temperature of the system remains constant
Pressure of the system remains constant
No heat enter or leave the system
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__________?
Lead
Tungsten
Aluminum
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 are good conductor of heat
All the metals form positive ions
All the metals form acidic oxides
Explanation:
The correct answer to the question is: All the metals form acidic oxides
Q.
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
methanol
carbonic acid
methane
methanol
Explanation:
The correct answer to the question is: methanol
Q.
Ozonolysis of acetylene gives:
Glyoxal then formic acid
Glycol
Formaldehyde
None
Explanation:
The correct answer to the question is: Glyoxal then formic acid
Q.
Ethylene diammine is ligand________?
Poly dentate
Bi dentate
tri dentate
mono dentate
Explanation:
The correct answer to the question is: Bi dentate
Q.
The PH of Tears is __________?
7.0
7.8
8.2
7.4
Explanation:
The correct answer to the question is: 7.4
Q.
The substance used in cancer therapy is___________?
Rn
Co
Fe
Ni
Explanation:
The correct answer to the question is: Co
Q.
Boric acid cannot be used__________________?
For enamel and glazes
In soda bottles
As antiseptic in medicine
For washing eyes
Explanation:
The correct answer to the question is: In soda bottles
Q.
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Benzaldehyde
Glyoxime
Glycol
Glyoxal
Explanation:
The correct answer to the question is: Glyoxal
Q.
Strong Nucleophile in polar aprotic solvent?
Chloride ion
Flouride ion
Bromide ion
Iodide ion
Explanation:
The correct answer to the question is: Flouride ion
Q.
The salt that gives the aqueous solution with pH less than 7, is called as____________?
Acidic salt
Amphoteric salt
Basic salt
Neutral salt
Explanation:
The correct answer to the question is: Acidic salt
Q.
Which one of the following is also known as tartaric acid ?
2 3-dihydroxy butance 1 4 -dioic acid
2 3 -dihydroxy butanioc acid
2 2 -dihydroxy butanoic acid
2 3 -dihydroxy butanedioic acid
Explanation:
The correct answer to the question is: 2 3-dihydroxy butance 1 4 -dioic acid
Q.
The law of traids is applicable to__________?
Cl, Br, I
F, Cl, Br
Li, Be, B
Na, K, Rb
Explanation:
The correct answer to the question is: Cl, Br, I
Q.
Actinides are the elements with atomic numbers from __________?
36 to 43
89 to 103
101 to 115
97 to 104
Explanation:
The correct answer to the question is: 89 to 103
Q.
Marsh gas is _________?
Methane
Nitrogen
Hydrogen
Ethane
Explanation:
The correct answer to the question is: Methane
Q.
Transition elements, in general, exhibit the following properties, except one. Name that property?
Formation of alloys
Tendency to form complexes
Natural Radioactivity
Variable oxidation state
Explanation:
The correct answer to the question is: Natural Radioactivity
Q.
Which one of the followings possesses melting point below 0°C?
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 substitution
nucleophilic addition
electronphilic addition
electrophilic substitution
Explanation:
The correct answer to the question is: nucleophilic addition
Q.
An alcohol produced during the formation of a soap process.
Ethylene glycol
Ethanol
Butanol
Glycerol
Explanation:
The correct answer to the question is: Glycerol
Q.
The quantity of petrol can be increased by ___________?
Refining
Cracking
Induction fueling
Reforming
Explanation:
The correct answer to the question is: Cracking
Q.
The oxidation of isopropyl alcohol will yield___________________?
Propanone
Propanol
Propanoic acid
propane
Explanation:
The correct answer to the question is: Propanone
Q.
Which of the following is not an amino acids_____________________?
lactic acid
glycine
aspartic acids
glumatic 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?
CuCl2
PbCl2
Cu2Cl2
PdCl2
Explanation:
The correct answer to the question is: CuCl2
Q.
Species are formed in one step of reaction mechanism and used up in another step are called:
Catalyst
activated complex
inhibitor
Intermediate
Explanation:
The correct answer to the question is: Intermediate
Q.
The composition of ‘ Golden spangles is_________?
PbCrO4
As2Cr2O7
PbI2
BaCrO4
Explanation:
The correct answer to the question is: PbCrO4
Q.
Which one of the following radiation has the longer wavelength?
x-ray
ultra violet
visible
infra red
Explanation:
The correct answer to the question is: infra red
Q.
Barret esophagus is good example of__________?
Hypertrophy
Metaplasia
Atrophy
Dysplasia
Explanation:
The correct answer to the question is: Metaplasia
Q.
Which one is least ionic in nature and decompose on heating ?
NaOH
LiOH
KOH
CsOH
Explanation:
The correct answer to the question is: LiOH
Q.
The molecular formula of Glucose is____________?
NH
CH
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
Steric strain
Orbital strain
Torsional strain
Explanation:
The correct answer to the question is: Steric strain
Q.
diamond got brilliance due to following reason?
dispersion
refraction
reflection
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
The process in which solid changes directly into vapours without passing through liquid state?
Evaporation
None
Sublimation
Decantation
Explanation:
The correct answer to the question is: Sublimation
Q.
Surface water contains:_____________?
only salt
Salt & Organic matter
Suspended impurity
Organic matter
Explanation:
The correct answer to the question is: Salt & Organic matter
Q.
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
Extract
Mother liquor
Molasses
Filterate
Explanation:
The correct answer to the question is: Molasses
Q.
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
Cone. HCI and anhydrous PCl2
Cone. HCI and anhydrous ZnCl2
Cone. HCI and anhydrous SOCl2
Cone. HCI and anhydrous CaCl2
Explanation:
The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Q.
The by-product of the process of Saponification is___________?
Glycol
Glycerol
Sodium hydroxide
Methanol
Explanation:
The correct answer to the question is: Glycerol
Q.
What is the color of precipitates of AgI?
Brown
Yellow
Light Yellow
Blue
Explanation:
The correct answer to the question is: Yellow
Q.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
0.2 moles
0.3 moles
0.4 moles
0.5 moles
Explanation:
The correct answer to the question is: 0.2 moles
Q.
Aldehydes and ketones both, show the type of Isomerism is __________?
Metamerism
Position Isomerism
chain Isomerism
Functional Group Isomerism
Explanation:
The correct answer to the question is: Functional Group Isomerism
Q.
Cations possess __________ charge?
None
-ve
+ve
Neutral
Explanation:
The correct answer to the question is: +ve
Q.
By which method the molecular mass of benzene was determined as 78.108 ?
Distillation methos
Vapour density method
Specific gravity method
X-ray diffraction method
Explanation:
The correct answer to the question is: Vapour density method
Q.
CO2 is gas while SiO2 is solid at room temperature?
CO2 forms multiple bond while silicon does not form multiple bonds
CO2 is an independent molecule while SiO2 has network covalent structure
carbon is non-metal while silicon is semi-metal
Silicon has all sigma bonds
Explanation:
The correct answer to the question is: CO2 is an independent molecule while SiO2 has network covalent structure
Q.
NaOH is named as caustic soda because________________?
It reacts with fats to form soap
It reacts with chlorine gas
It corrodes the organic tissues
It is used in soda water
Explanation:
The correct answer to the question is: It corrodes the organic tissues
Q.
The rectified spirit contains________________?
95% alcohol
90% alcohol
12% alcohol
100% alcohol
Explanation:
The correct answer to the question is: 95% alcohol
Q.
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
Four
Two
Three
Six
Explanation:
The correct answer to the question is: Three
Q.
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
Radium dating
Carbon dating
Deuterium dating
Uranium dating
Explanation:
The correct answer to the question is: Carbon dating
Q.
Which of the following is the Radioactive isotope of Hydrogen?
Nichromium
Deuterium
Protium
Tritium
Explanation:
The correct answer to the question is: Tritium
Q.
The radiations with negative charge are________.
Alpha radiations
Gamma radiations
positron
Beta radiations
Explanation:
The correct answer to the question is: Beta radiations
Q.
Bleaching powder is an example of________________?
Normal salt
Mixed salt
Complex
Double salt
Explanation:
The correct answer to the question is: Mixed salt
Q.
What is the color of precipitates of AgBr?
Light yellow
Light green
Light Blue
Light brown
Explanation:
The correct answer to the question is: Light yellow
Q.
P2O5 is a hygroscopic powder which sublimes at______________?
630°C
360°C
260°C
620°C
Explanation:
The correct answer to the question is: 360°C
Q.
The IUPAC name of ethylene oxide is__________?
Oxirane
Oxoethene
Epoxy methane
Methoxymethane
Explanation:
The correct answer to the question is: Oxoethene
Q.
The concept of telluric helix was developed by___________?
Newland
Dobereiner
A.E de Chancourtois
Lother Meyer
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:
43.6g
41.4g
45g
40g
Explanation:
The correct answer to the question is: 43.6g
Q.
What catalyst is employed when benzene is prepared from acetylene at 70°C?
Ni 250 – 300°C
Cr2O3 + A2O3 + SiO2
Raney nickel
Organo-nickel
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
carbonic acid
lactic acid
citric acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Alpha particles can be detected by using___________?
Gold foils
Barium sulphate
Zinc sulphide screen
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
Z= At/M
Z=At
w=ZAt
Explanation:
The correct answer to the question is: w=ZAt
Q.
The subatomic particle that has negative charge is___________?
Neutron
Electron
None of These
Proton
Explanation:
The correct answer to the question is: Electron
Q.
The reaction of C2H5OH with conc. H2SO4 does not give_________?
Ethene
Acetylene
Ethyl hydrogen sulphate
Diethyl ether
Explanation:
The correct answer to the question is: Acetylene
Q.
Following are the anions of soap which form Ca and Mg ions which we see as curd in water
Sodium pentadecanoate
Sodium hexadecanoate
Sodium octadecanoate
Both A & B
Explanation:
The correct answer to the question is: Both A & B
Q.
The PH of the 0.0032 M H2SO4 is__________?
1.0
4.0
2.198
3.2
Explanation:
The correct answer to the question is: 3.2
Q.
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
3e
e
4e
2e
Explanation:
The correct answer to the question is: 2e
Q.
Polyamides are synthetic polymers commonly known as___________?
synthetic
Cellulose
Nylon
Protein
Explanation:
The correct answer to the question is: Nylon
Q.
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
Two
Four
Five
Three
Explanation:
The correct answer to the question is: Three
Q.
The distribution coefficient is related to:______________?
decreasing factors
Separating factors
retardation factors
Colouring 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__________________?
CaCO3
NH4Cl
NaNO3
Ba (NO3)2
Explanation:
The correct answer to the question is: NaNO3
Q.
Which of the following is the most reactive_________________?
ethyne
ethane
benzene
ethene
Explanation:
The correct answer to the question is: ethene
Q.
Where does the oxygen that keeps us alive come from?
Water
Carbonates absorbed from soil
Oxides of minerals
Carbon dioxide
Explanation:
The correct answer to the question is: Water
Q.
Which is the paramagnetic oxide of chlorine ?
Cl2O7
ClO2
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 polarity of C-Mg bond
the presence of magnesium atom
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 & Low Pressure
High Temp & Low Pressure
Low Temp & High Pressure
Explanation:
The correct answer to the question is: High Temp & Low Pressure
Q.
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
6.5gm
0.65gm
7.5gm
0.065gm
Explanation:
The correct answer to the question is: 7.5gm
Q.
Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
lactomint
formamint
aldomint
formalactose
Explanation:
The correct answer to the question is: formamint
Q.
Solvent used in separation of biomolecules is _______________?
Trichloroacetic acid
Acetone
Ether
Alcohol
Explanation:
The correct answer to the question is: Trichloroacetic acid
Q.
The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
Laughing Gas
CO²+O²
CO³+H²O
CO+H²(water gas)
Explanation:
The correct answer to the question is: CO+H²(water gas)
Q.
Lactic acid on oxidation by alkaline potassium permanganate gives:____________?
Propionic acid
Tartaric acid
Pyruvic acid
Cinnamic acid
Explanation:
The correct answer to the question is: Pyruvic acid
Q.
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
Ethyl benzene
Toluene
All
n-propyl benzene
Explanation:
The correct answer to the question is: All
Q.
Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?
CuSO4
AgNO3
K2MnO4
CH3COOH
Explanation:
The correct answer to the question is: AgNO3
Q.
The rate of formation of ozone depends on the flux of:
Gamma rays
Infrared radiation
Ultra violet radiation
visible radiation
Explanation:
The correct answer to the question is: Ultra violet radiation
Q.
In water, Hydrogen is present ________by mass.
11.11%
31.13%
15.15%
22%
Explanation:
The correct answer to the question is: 11.11%
Q.
Polyvinyl acetate is the Polymer of __________?
Formaldehyde
Vinyl Chloride
Vinyl acetate
Methyl methacrylate
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
Fats
Proteins
Carbohydrates
Explanation:
The correct answer to the question is: Proteins
Q.
O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
Ethyl alcohol
HCHO
Ethylene oxide
Ethylene glycol
Explanation:
The correct answer to the question is: HCHO
Q.
In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
two
one
four
three
Explanation:
The correct answer to the question is: one
Q.
Which instrument is used to measure the viscosity.?
Viscometer
Anemometer
Hygrometer
Hydrometer
Explanation:
The correct answer to the question is: Viscometer
Q.
For which mechanisms the first step involved is the same ?
E2 + SN2
E1 and SN1
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 ?
Neon
Helium
Chlorine
lithium
Explanation:
The correct answer to the question is: lithium
Q.
An alcohol which can be prepared by fermentation is_________________?
CH3 – CH2 – OH
C6H5OH
C3H7OH
CH3OH
Explanation:
The correct answer to the question is: CH3 – CH2 – OH
Q.
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
pink
brick red
yellow
black
Explanation:
The correct answer to the question is: brick red
Q.
Which of the following statements is false about transition metals?
They form complexes
They show variable valency
They form coloured ions
All transition metal compounds are paramagnetic
Explanation:
The correct answer to the question is: All transition metal compounds are paramagnetic
Q.
Which one of following amino acid is neither acidic nor a basic in nature ?
Glutamic acid
Proline
Lysine
Histidine
Explanation:
The correct answer to the question is: Proline
Q.
Which of the following will have the highest boiling point ?
hexanone
methanol
ethanal
propanal
Explanation:
The correct answer to the question is: hexanone
Q.
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
5.05 gram
2.05 gram
4.05 gram
3.05 gram
Explanation:
The correct answer to the question is: 3.05 gram
Q.
Which one of the following is most acidic?
P-nitrophenol
M-nitrophenol
Phenol
O-nitrophenol
Explanation:
The correct answer to the question is: P-nitrophenol
Q.
The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
1-5Kg
1-3Kg
1-2Kg
1-4Kg
Explanation:
The correct answer to the question is: 1-2Kg
Q.
The average salinity of sea water is________?
3.5%
3%
2%
2.5%
Explanation:
The correct answer to the question is: 3.5%
Q.
Which element can form tripositive ion ?
Beryllium
Silicon
Carbon
Aluminium
Explanation:
The correct answer to the question is: Aluminium
Q.
The element used for the formation of alloys is__________?
Iron
Mercury
Chromium
Calcium
Explanation:
The correct answer to the question is: Chromium
Q.
Which one of the following halogens is present in Teflon________________?
Cl2
I2
Br2
F2
Explanation:
The correct answer to the question is: F2
Q.
Dimethyl ketones are usually characterized through_____________?
Tollen’s reagent
Schiff’s test
Iodoform test
Benedict’s reagent
Explanation:
The correct answer to the question is: Iodoform test
Q.
Which molecule have stronger London dispersion forces?
Hydrochloric acid
Hydrogen gas
Bromine
Water
Explanation:
The correct answer to the question is: Water
Q.
The IUPAC name of pyridines is__________?
Azine
Azolidins
Diazine
Azolo
Explanation:
The correct answer to the question is: Azine
Q.
The organic compound used as antiknock agent in petroleum is____________?
CH )Hg
CH MgBr
TNT
(CH )Pb
Explanation:
The correct answer to the question is: (CH )Pb
Q.
Identify among the following which is not the unsaturated hydrocarbon.
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Which one of the following is the correct sequence according to atomic weights?
Ni> Co> Fe
Co > Ni > Fe
Co >Fe>Ni
Fe>Co> Ni
Explanation:
The correct answer to the question is: Co > Ni > Fe
Q.
The Chemical Formula of Sand is___________?
Si2O3
Al2O3
Sr2O
SiO2
Explanation:
The correct answer to the question is: SiO2
Q.
Generally the limit of visible spectrum is__________?
1000 to 300 A°
3800 to 7600 A°
8000 to 10,000 A°
12,000 to 15,000 A°
Explanation:
The correct answer to the question is: 3800 to 7600 A°
Q.
Which gas is used for artificial ripening of green fruit ?
Ethylene
Carbon dioxide
Ethane
Acetylene
Explanation:
The correct answer to the question is: Ethylene
Q.
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
Aniline formaldehyde plastic
urotropine
Bakelite
Nylon 66
Explanation:
The correct answer to the question is: Bakelite
Q.
Which of the following can be separated by ” Sublimation Method”?
None
Sand and Naphthalene
Sand and Iron Filing
Both A & B
Explanation:
The correct answer to the question is: Sand and Naphthalene
Q.
The rate of E1 reaction depends upon______________________?
the concentration of substrate
the concentration of substrate as well as nucleophile
the concentration of nucleophile
base the concentration of substrate as well as nucleophile
Explanation:
The correct answer to the question is: the concentration of substrate
Q.
The maximum mass is present in 1dm3 for the following gas at STP.
CO
CS
CH
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?
CH4
He
None of These
N2
Explanation:
The correct answer to the question is: He
Q.
Acetophenone is a_____________________?
Ether
Ester
Aldehyde
Ketone
Explanation:
The correct answer to the question is: Ketone
Q.
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p5 3d10
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p6 4s23d5
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p6 4s23d5
Q.
All members of homologous series have different __________?
physical properties
all of them
functional group
chemical properties
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?
2
1
3
more than 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_________?
according to atom’s atomic number.
None of the above
According to atom’s atomic mass.
First we balance Metal than non-metal than Hydrogen than Oxygen.
Explanation:
The correct answer to the question is: First we balance Metal than non-metal than Hydrogen than Oxygen.
Q.
Hyperconjugation is also known as ____________?
no bond reasonable
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?
HCO
HSO
O
HClO
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____
Secondary Alcohol
None of These
Tertiary alcohol
Primary Alcohol
Explanation:
The correct answer to the question is: Primary Alcohol
Q.
Incomplete oxidation of methane in the limited supply of air forms ?
CO + H2O + C
CO + H2 + C
CO2 and H2O
CH3OH
Explanation:
The correct answer to the question is: CH3OH
Q.
The only non metal exists in liquid state is ___________?
Mercury
Bromine
Iodine
Phosphorus
Explanation:
The correct answer to the question is: Bromine
Q.
A brivalent metal has the equivalent weighr of 12. The molecular weight to its oxide will be_______?
40
32
36
24
Explanation:
The correct answer to the question is: 40
Q.
An acid with unpleasant smell_________________?
acetic acid
formic acid
butyric acid
propionic acid
Explanation:
The correct answer to the question is: butyric acid
Q.
The system which can exchange matter as well as energy with its surroundings is called____________?
Isolated system
open system
Inert system
Closed system
Explanation:
The correct answer to the question is: open system
Q.
Formalin is ___________ solution of formaldehyde in water?
20%
60%
10%
40%
Explanation:
The correct answer to the question is: 40%
Q.
The element cesium bears resemblance with________________?
Cr
Ca
Both of the above
None of the above
Explanation:
The correct answer to the question is: None of the above
Q.
Li is different from its family members due to____________________?
all of the above
less electropositivity
small size
high charge density
Explanation:
The correct answer to the question is: all of the above
Q.
Carbonates of lithium are not stable like that of sodium due to________________?
Low charge density
Low electropositivity
Not known yet
Low electronegativity
Explanation:
The correct answer to the question is: Low electropositivity
Q.
Alkyl halides undergo a type of reaction_________________?
both A & C
Nucleophilic addition
Nucleophilic substitution
Elimination
Explanation:
The correct answer to the question is: both A & C
Q.
If temperature of gallium arsenide is increased then its conductivity will___________________?
first decreases then increases
decrease
remains constant
increase
Explanation:
The correct answer to the question is: increase
Q.
Order of ease of halogenation in alkane is________________?
I2>Cl2>Br2>F2
F2>Cl2>Br2>I2
F2>Cl2>I2>Br2
Cl2>F2>Br2>I2
Explanation:
The correct answer to the question is: F2>Cl2>Br2>I2
Q.
Alcohols of lower Molecular weight are _______________?
More Soluble in water
Insoluble in water
Insoluble in all solvents
Soluble in water on heating
Explanation:
The correct answer to the question is: More Soluble in water
Q.
General formula of alkyne is______________?
CnH2n + 2
CnH2n – 2
CnH2n + 2
CnH2n
Explanation:
The correct answer to the question is: CnH2n – 2
Q.
Which of the following is non spontaneous cell?
Electrolytic cell
Galvanic cell
Not
Daniel cell
Explanation:
The correct answer to the question is: Electrolytic cell
Q.
The bond angle between hybrid orbitals in methane CH3 is___________?
105. 7°
180°
109.5°
115.5°
Explanation:
The correct answer to the question is: 109.5°
Q.
Phosphorus is a Greek word and it means_________________?
Tetrahedral
Impure
Fire
Light bearing
Explanation:
The correct answer to the question is: Light bearing
Q.
Alkaline PH scale starts from?
7 to 11
6 to 10
0 to 14
8 to 14
Explanation:
The correct answer to the question is: 8 to 14
Q.
The word Alkali means__________________?
Base
Ashes
Spirit
Basic salt
Explanation:
The correct answer to the question is: Ashes
Q.
At what digit of PH scale PH is neutral?
5
10
3
7
Explanation:
The correct answer to the question is: 7
Q.
Silver nitrate is also known as____________?
Blue Vitriol
Lunar Caustic
Both A & B
Blue Stone
Explanation:
The correct answer to the question is: Lunar Caustic
Q.
Optic fibres are used in :
Endoscopy
CAT scans
X-ray photos
Ultrasound scans
Explanation:
The correct answer to the question is: Endoscopy
Q.
Which of the following is not a use of acetaldehyde ?
antiseptic inhalant
formation of phenolic resins
formation of mirror
formation of throat lozenges
Explanation:
The correct answer to the question is: formation of throat lozenges
Q.
Which of the halogen has highest electronegativity ?
Fluorine
Chlorine
Iodine
Bromine
Explanation:
The correct answer to the question is: Fluorine
Q.
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphorus pentoxide
Phosphine
Phosphorus
Water
Explanation:
The correct answer to the question is: Phosphine
Q.
Which of the following is a soft Coal?
Lignite
Bituminous
Peat
Anthracite
Explanation:
The correct answer to the question is: Bituminous
Q.
The properties which do not depend on mass of the substance are _____________?
None of These
intensive properties
Colligative properties
Extensive 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
both a and b
acidic character of reagent
increases the nucleophilic character of reagent
Explanation:
The correct answer to the question is: increases the nucleophilic character of reagent
Q.
Which one of the following is caustic potash?
NaOH
NaBH4
NaCl
KOH
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 temperature
To check its Purity and nature
To check its Acidity and Basicity
None of These
Explanation:
The correct answer to the question is: To check its Purity and nature
Q.
In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?
OH
Oxygen
Sulphur
Hydrogen
Explanation:
The correct answer to the question is: Sulphur
Q.
The halogen which reacts very slowly with halogen is________________?
Bromine
Chlorine
Iodine
Fluorine
Explanation:
The correct answer to the question is: Iodine
Q.
The O-O linkage is present in__________?
H2S4O6
H2SO8
H2S2O3
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 Hydrogen bonding
Due to its Low molecular weight
Due to high molecular weight
Due to its Acidic nature
Explanation:
The correct answer to the question is: Due to Hydrogen bonding
Q.
Colour in transition metal compounds is attributed to____________?
Small sized metal ions
Incomplete (n-1) d sub-shell
Complete ns sub-shell
Absorption of light in UV region
Explanation:
The correct answer to the question is: Incomplete (n-1) d sub-shell
Q.
In homologous series there is the difference of mass between adjacent members.
Q.
Parke’s process is used in the extraction of________?
Iron
Sodium
Silver
Zinc
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?
decreases by two times
decrease by four times
increases by four times
increases by two times
Explanation:
The correct answer to the question is: increases by four times
Q.
All the elements in group VIA are ___________________ in nature?
metals
hygroscopic
all of above
polymeric
Explanation:
The correct answer to the question is: polymeric
Q.
The usual property of ionic crystal are:_____________?
Compound forming
Stable
gaseous form
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
Lime
permangnate
Chlorine
Explanation:
The correct answer to the question is: Lime
Q.
The resonance energy of benzene is__________________?
150.5 Cal/mol
150.5 kJ/mol
250.5 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___________?
water equivalent
thermal capacity
None of the above
specific heat
Explanation:
The correct answer to the question is: thermal capacity
Q.
In unsaturated hydrocarbons electrons favour___________________?
addition reactions
substitution reactions
less reactivity
none
Explanation:
The correct answer to the question is: addition reactions
Q.
The formula of starch is__________________?
C12H22O11
(C6H10O5)n
C6H10O5
C6H12O6
Explanation:
The correct answer to the question is: (C6H10O5)n
Q.
Who is often referred to as the “father of Chemistry”?
Antoine Lavoisier
Albert Einstein
Isaac Newton
Dmitri Mendeleev
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 __________ ?
Raised
Compressed
Remains same
Depressed
Explanation:
The correct answer to the question is: Depressed
Q.
4moles of Carbon dioxide(CO2) have _____molecules.
12.04 x 10
24.08 x 10
18.06 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?
Parabolic
Zig-zag
Hyperbolic
Straight
Explanation:
The correct answer to the question is: Straight
Q.
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
(CH3)2 CH – X
(CH3)3 C – X
(CH3)3 C-CH2 – X
CH3-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 __________ ?
75.5pm
75.4pm
75.3pm
75.2pm
Explanation:
The correct answer to the question is: 75.4pm
Q.
O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
HCHO
Ethyl alcohol
Ethylene glycol
Ethylene oxide
Explanation:
The correct answer to the question is: HCHO
Q.
The bond energy of Hydrogen molecule is__________?
110Kcal/mol
150KJcal/mol
106Kcal/mol
104Kcal/mol
Explanation:
The correct answer to the question is: 104Kcal/mol
Q.
The following alcohol does not undergo oxidation is _____________?
2° alcohol
1° alcohol
3° alcohol
0° alcohol
Explanation:
The correct answer to the question is: 3° alcohol
Q.
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
The presence of Oxygen
The presence of excessive Oxygen
The presence of Hydrogen
The absence of Oxygen
Explanation:
The correct answer to the question is: The absence of Oxygen
Q.
SN2 reaction can be best carried out with__________________?
secondary alkyl halide
all
tertiary alkyl halide
primary alkyl halide
Explanation:
The correct answer to the question is: primary alkyl halide
Q.
Magnesium metal does not burn in the vessel containing_______________?
O2
Ne
N2
N2 and O2
Explanation:
The correct answer to the question is: Ne
Q.
Which is fused cyclic aromatic compound _____________________?
diphenyl methane
biphenyl
diphenyl amine
naphthalene
Explanation:
The correct answer to the question is: naphthalene
Q.
Potassium Permanganate is used for purifying drinking water, because_________?
It is an oxidising agent.
It is a sterilising agent.
It dissolves the impurities of water.
It is a reducing agent.
Explanation:
The correct answer to the question is: It is an oxidising agent.
Q.
Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
Halides
Aldehydes
Alkali metals
Ketones
Explanation:
The correct answer to the question is: Halides
Q.
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
dihydric alcohol
primary alcohol
tertiary alcohol
secondary alcohol
Explanation:
The correct answer to the question is: tertiary alcohol
Q.
The metallurgical process in which a metal is obtained in a fused state is called__________?
calcinations
smelting
roasting
froth floatation
Explanation:
The correct answer to the question is: smelting
Q.
The gas which cannot be dried by conc. H2SO4 ?
C2H4
H2S
CO2
SO2
Explanation:
The correct answer to the question is: H2S
Q.
Ce58 is a member of__________?
f-block
P-block
S-block
d-block
Explanation:
The correct answer to the question is: f-block
Q.
Fluorine can react with_________________?
Kr
All of the above
Rn
Xe
Explanation:
The correct answer to the question is: All of the above
Q.
FeSO4 forms brown ring with________________?
N2O
N2O3
NO
NO2
Explanation:
The correct answer to the question is: NO
Q.
The Branch of chemistry dealing with brewing and distilling is called _______ ?
Zygology
Zymology
Zymurgy
Zootaxy
Explanation:
The correct answer to the question is: Zymurgy
Q.
In diaphragm cell hydrogen is discharged by the reduction of__________________?
NaCl
Na+
Water
HCI
Explanation:
The correct answer to the question is: Water
Q.
The rays that have negative charge are ___________?
Anode Rays
Canal Rays
Cathode Rays
Gamma Rays
Explanation:
The correct answer to the question is: Cathode Rays
Q.
What is the formula of Silver nitrate?
AgNO
AgNO2
AgNO4
AgNO3
Explanation:
The correct answer to the question is: AgNO3
Q.
Coal gas is made up of mostly ________ & _________?
Hydrogen & Carbon dioxide
Hydrogen & Methane
Hydrogen & Water
Carbonmonoxdide & water
Explanation:
The correct answer to the question is: Hydrogen & Methane
Q.
Removal of CO2 is called_____________________?
esterification
carboxylation
hydroxylation
decarboxylation
Explanation:
The correct answer to the question is: decarboxylation
Q.
The oxidation state of cu which are expected to be diamagnetic
Cu+4
Cu+2
Cu+1
Cu+3
Explanation:
The correct answer to the question is: Cu+1
Q.
The marsh gas is ___________?
Methane
Butane
Propane
Ethane
Explanation:
The correct answer to the question is: Methane
Q.
The maximum oxidation shown by manages is_________?
+7
+5
+2
+4
Explanation:
The correct answer to the question is: +7
Q.
The oxides of beryllium BeO is_______________?
Basic
Amphoteric
Neutral
Acidic
Explanation:
The correct answer to the question is: Amphoteric
Q.
When one hydrogen atom of alkane is removed then it is called________________?
alkyl
alkene
aldehyde
saturated hydrocarbon
Explanation:
The correct answer to the question is: alkyl
Q.
Which of the following is a neutral particle ?
Alpha particle
Electron
Neutron
Proton
Explanation:
The correct answer to the question is: Neutron
Q.
Boron in soil has been considered micronutrient for_________________?
Soil porocity
All
Alkalinity of soil
Proper growth of plants
Explanation:
The correct answer to the question is: Proper growth of plants
Q.
What is the Chemical formula of Zinc Hydroxide _________ ?
Zn(OH)2
Zn2(OH)3
ZNO2
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 ________________?
Br2
F2
Cl2
I2
Explanation:
The correct answer to the question is: Cl2
Q.
Benzene gives mainly_________?
All of these
Addition reaction
Halogenation
Substitution reactions
Explanation:
The correct answer to the question is: Substitution reactions
Q.
In which compound nitrogen has maximum oxidation state____________________?
N2O
HNO3
NO2
HNO2
Explanation:
The correct answer to the question is: HNO3
Q.
In Bosch Process, that is used to separate the Hydrogen gas from water Gas, the catalyst is used ______?
FeO
Pt
Cr²O³
Both B&C
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 ?
Cl2O6
Cl2O7
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 reflects most of the heat from the sun
it has a high latent heat of fusion
it has a low specific heat capacity
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 ____________?
Nuclear fission
Thermionic emission
Photoelectric emission
Nuclear fusion
Explanation:
The correct answer to the question is: Nuclear fusion
Q.
The metal which is used in thermite process because of its activity is____________________?
aluminium
zinc
iron
copper
Explanation:
The correct answer to the question is: aluminium
Q.
LiAlH4 converts Acetaldehyde into ___________?
Ethyl alcohol
Methyl alcohol
Acetic acid
Methane
Explanation:
The correct answer to the question is: Ethyl alcohol
Q.
The solution remaining after the formation of crystals is called ___________________?
both A & B
Residue
Dilute solution
Mother liquor
Explanation:
The correct answer to the question is: Mother liquor
Q.
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
a dehydrating agent
as sulphonating agent
an acid
an oxidizing agent
Explanation:
The correct answer to the question is: a dehydrating agent
Q.
Which one is a pure carbon?
Coal Tar
Coke
None of These
Coal gas
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___________?
Henry’s law
Gay Lussac’s law
Raoult’s law
Dalton’s law
Explanation:
The correct answer to the question is: Henry’s law
Q.
When phenol is heated with concentrated nitric acid the product is________________?
p-nitrophenol
1 3 5 -trinitro benzene
o-nitrophenol
Picric acid
Explanation:
The correct answer to the question is: Picric acid
Q.
The systematic name of sucrose is_______?
1-β- D- glucofuranosyl-2-α- D- fructofuranoside
1-α-D- glucopyranosyl-2-β-D-fructopyranoside
11-α-D-glucopyranosyl-2-β-D-fructofuranoside
1-α-D- glucofuranosyl-2-α-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_________________?
ethanol and methanol
all of the above
acetone and diethyl ketone
acetaldehyde and methanal
Explanation:
The correct answer to the question is: all of the above
Q.
What are the metal bearing rocks called?
Metalloids
Ores
Bitumen
Bauxite
Explanation:
The correct answer to the question is: Ores
Q.
Find the PH of a 0.001 M solution of Nitric acid HNO3?
3
2
4
5
Explanation:
The correct answer to the question is: 3
Q.
Which one does not give borax bead test_________________?
Cobalt sulphate
Copper sulphate
Barium sulphate
Nickel sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
Removal of halogen and hydrogen atom is_________________?
dehalogenation
dehydrohalogenation
hydrohalogenation
halogenation
Explanation:
The correct answer to the question is: dehydrohalogenation
Q.
Cathode is a metalic plate where__________ takes place.
Redox
Substitution
Oxidation
Reduction
Explanation:
The correct answer to the question is: Reduction
Q.
In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
None of them
Flouride
Sodium
H²O
Explanation:
The correct answer to the question is: H²O
Q.
Borax is a white crystalline solid and it is_________________?
More soluble in hot water
Soluble only in organic solvents
More soluble in cold water
Insoluble in water
Explanation:
The correct answer to the question is: More soluble in hot water
Q.
Which allotropic form of phosphorous is the most stable ?
White
black
red
Violet
Explanation:
The correct answer to the question is: black
Q.
Preparation of vegetable ghee involves_________________?
hydroxylation
hydrogenation
hydration
halogenation
Explanation:
The correct answer to the question is: hydrogenation
Q.
which Compound Destroy The OZONE ?
CH3COOH
CFCs
None Of These
BOTH A & B
Explanation:
The correct answer to the question is: CFCs
Q.
The medium which interact with long lived pollutant is:_____________?
Sink
All of them
Source
Receptor
Explanation:
The correct answer to the question is: Sink
Q.
Acetaldehyde cannot show
Iodoform test
Lucas test
Benedict’s test
Tollen’s test
Explanation:
The correct answer to the question is: Lucas test
Q.
Which of the following is the use of Silver nitrate?
used as mordant in dyeing
used in making green pigments
used in photography and medicines
All of these
Explanation:
The correct answer to the question is: used in photography and medicines
Q.
Which one of the following pairs shown diagonal relationship in the periodic table ?
Sodium and Lithium
Boron and Beryllium
Lithium and magnesium
Lithium and beryllium
Explanation:
The correct answer to the question is: Lithium and magnesium
Q.
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
Electrophilic substitution
Nucleophilic addition
Necleophilic substitution
Electrophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
hydride ion
methoxide ion
hydrogen ion
oxide ion
Explanation:
The correct answer to the question is: hydride ion
Q.
Photographic plates are coated with a thin film of _________________?
AgI
AgNO3
AgCl
AgBr
Explanation:
The correct answer to the question is: AgBr
Q.
One Water molecule can form maximum ______hydrogen bonds.
None
2
3
4
Explanation:
The correct answer to the question is: 4
Q.
Boyle’s Law was given by the Robert Boyle in_______?
1663
1661
1662
1660
Explanation:
The correct answer to the question is: 1662
Q.
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Zymase-maltase-diastase
Maltase-diastase-zymase
Diastase-zymase-maltase
Diastase-maltase-zymase
Explanation:
The correct answer to the question is: Diastase-maltase-zymase
Q.
The chemical composition of cinnabar is__________________?
HgS
FeS
PbS
ZnS
Explanation:
The correct answer to the question is: HgS
Q.
Identify the unsaturated compound that does not give red ppts when treated with____________Ammonical cuprous chloride
CH-CH-CCH (1-Butyne)
CH=CH
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-Fe alloy
Ni-Al alloy
Ni-Cu alloy
Ni-Mg alloy
Explanation:
The correct answer to the question is: Ni-Al alloy
Q.
The practical problem in Hydrogen production is it:______________?
Chemical property
Size
Weight
Valency
Explanation:
The correct answer to the question is: Weight
Q.
Which of the following shows electrical conduction_____?
Sodium
Graphite
Diamond
Potassium
Explanation:
The correct answer to the question is: Graphite
Q.
Chlorination of toluene in the presence of sublight produces_________________?
benzoic acid
p – chlorotoluene
o – chlorotoluene
Benzyl chloride
Explanation:
The correct answer to the question is: Benzyl chloride
Q.
Octane number is 0 value for ___________?
iso-octane
n-hexane
n-heptane
iso-heptane
Explanation:
The correct answer to the question is: n-heptane
Q.
Which one of the following substances conducts electricity by the movement of ions ?
Copper
Graphite
Molten sodium chloride
Mercury
Explanation:
The correct answer to the question is: Molten sodium chloride
Q.
The fundamental way to transfer energy are:_____________?
heat and work
heat and volume
pressure and temperature
pressure and volume
Explanation:
The correct answer to the question is: heat and work
Q.
The main buffer system of the human blood is____________?
HCO – CO
NHCONH – NHCONH
CHCOOH – CHCOO
HCO – HCO
Explanation:
The correct answer to the question is: HCO – HCO
Q.
The acetylene molecule contains:___________?
3 sigma and 2 pi bonds
5 sigma bonds
4 sigma and 1 pi bonds
2 sigma and 3 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 & O2
alkene & N2
alkyne & Cl2
Aalkene & H2
Explanation:
The correct answer to the question is: Aalkene & H2
Q.
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
6
4
2
1
Explanation:
The correct answer to the question is: 4
Q.
Surface Tension ________with increasing the surface area of liquid?
Remains Same
None
Increases
Decreases
Explanation:
The correct answer to the question is: Decreases
Q.
Which of the following reagents will react with both aldehydes and ketones ?
Benedicts reagent
Grignard reagent
Tollens reagent
Fehlings 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
ants are attracted by the odour of this acid
this acid, in ancient times, was used to eliminate ant-hills
this acid was first obtained by the distillation of ants
Explanation:
The correct answer to the question is: this acid was first obtained by the distillation of ants
Q.
Soda lime is a mixture of____________________?
CaO and NaOH
NaOH and Na2O
Na2O and KOH
CaO and KOH
Explanation:
The correct answer to the question is: CaO and NaOH
Q.
Ethanol can be converted into ethanoic acid by_________________?
Fermentation
Hydration
Oxidation
Hydrogenation
Explanation:
The correct answer to the question is: Oxidation
Q.
The most useful dye for those fabric which can form hydrogen bonds is:_____________?
Direct dye
Acid dye
Mordent dye
Vat 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 second ioniation potential
high electronegativity
Explanation:
The correct answer to the question is: high second ioniation potential
Q.
Which one of the following is the weakest acid in water__________________?
HBr
HF
HCI
HI
Explanation:
The correct answer to the question is: HF
Q.
Which of the following sulphates is not soluble in water ?
Zinc sulphate
Potassium sulphate
Sodium sulphate
Barium sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
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:
Gamma rays
All of these
Infrared
Ultra voilet
Explanation:
The correct answer to the question is: Infrared
Q.
Product of Nucleophilic Substitution Uni Molecular reaction is in case of chiral substrate?
Stereospecific
Recemic Mixture
Inversion
Retention
Explanation:
The correct answer to the question is: Recemic Mixture
Q.
The Electronegativity of Hydrogen is _____.
2.2
2.8
1.8
3.1
Explanation:
The correct answer to the question is: 2.2
Q.
The valency of carbon Atom is __________ ?
1
4
2
3
Explanation:
The correct answer to the question is: 4
Q.
Elements which emit natural radioactivity are known as __________ ?
Nuclear elements
Radioactive elements
Radio elements
Active elements
Explanation:
The correct answer to the question is: Radioactive elements
Q.
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
0.115
0.015
0.215
0.900
Explanation:
The correct answer to the question is: 0.115
Q.
The typical reactions of aldehyde is _____________?
Nucleophilic substitution
Nucleophilic addition
Electrophilic 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 _________?
Sharing of electrons
Gain of electrons
Losing of electrons
Transfer of electrons
Explanation:
The correct answer to the question is: Sharing of electrons
Q.
One fathom is equal to:__________?
60 feet
6 feet
6 meters
100 cm
Explanation:
The correct answer to the question is: 6 feet
Q.
Silicon differ from silica by a group of__________________?
OCH3
OH
O2
Ch3
Explanation:
The correct answer to the question is: Ch3
Q.
A metallic atom loses its valence electron to form a/an _________?
none of these
an anion
a cation
an anion – cation
Explanation:
The correct answer to the question is: a cation
Q.
Which compound shows hydrogen bonding ?
C2H6
CH3OCH3
C2H5OH
C2H5Cl
Explanation:
The correct answer to the question is: C2H5OH
Q.
Which of the following alloys contain(s) Cu and Zn?
Type metal
Gun-metal
Bronze
Brass
Explanation:
The correct answer to the question is: Brass
Q.
Noble gases are so called zero group because they have:_________?
Zero Electronegativity
Zero Valency
Both A and B
Zero Electron Affinity
Explanation:
The correct answer to the question is: Both A and B
Q.
Magnetic quantum number specifies___________?
Shape of orbitals
Orientation of orbitals
All of the above
Size of orbitals
Explanation:
The correct answer to the question is: Orientation of orbitals
Q.
2-Butyne contains:______________?
sp hybridised carbon atoms only
both sp and sp hybridised carbon atoms
both sp and sp hybridised carbon atoms
sp hybridised carbon atoms only
Explanation:
The correct answer to the question is: both sp and sp hybridised carbon atoms
Q.
Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
Tartaric acid
Valeric acid
Propanoic acid
Lactic acid
Explanation:
The correct answer to the question is: Lactic acid
Q.
How many isomeric aldoses are possible for the molecular formula C6H12O6?
2
4
16
7
Explanation:
The correct answer to the question is: 16
Q.
Lead battery is secondary battery the paste used in it is______________?
Ammonium chloride
AOT
Magnese dioxide
Zinc chloride
Explanation:
The correct answer to the question is: AOT
Q.
Identify the Lucas reagent among the following
Conc. HNO & Anhydrous MgCl
Conc. HCl & Anhydrous ZnCl
Dil. HCl & hydrated ZnCl
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?
6
8
7
5
Explanation:
The correct answer to the question is: 5
Q.
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
f-Block
P-Block
S-Block
d-Block
Explanation:
The correct answer to the question is: f-Block
Q.
Which compound will readily undergo sulphonation ?
Chlorobenzene
Benzene
Toluene
Nitro benzene
Explanation:
The correct answer to the question is: Toluene
Q.
If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?
CHO2
CH2O
CH2
C2H2O4
Explanation:
The correct answer to the question is: CHO2
Q.
The Ionization energy of Hydrogen is __________?
13.6ev
12.54ev
17.56ev
10.54ev
Explanation:
The correct answer to the question is: 13.6ev
Q.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
benzaldehyde
acetone
formaldehyde
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 _________ ?
Negative particle
Alpha particle
Beta particle
Gamma particle
Explanation:
The correct answer to the question is: Alpha particle
Q.
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
Chlorine
Fluorine
Iodine
Bromine
Explanation:
The correct answer to the question is: Iodine
Q.
The molecules of which gas have highest speed?
H at -73C
O at 0C
N at 1,027C
CH at 300 K
Explanation:
The correct answer to the question is: H at -73C
Q.
Boron is non metal while other elements of IIIA group are metals. This is because______________?
it has small size
all of the above
it has high nuclear charge
it forms molecular addition compounds
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_________?
+1
+2
+4
+3
Explanation:
The correct answer to the question is: +3
Q.
The decomposition of nitroglycerine is an example of:
Self catalytic reaction
Autocatalytic reaction
Enzyme catalytic reaction
induced catalysis
Explanation:
The correct answer to the question is: Autocatalytic reaction
Q.
Which of the following will give phosphoric acid one reaction with water_________________?
All of the above
PCI5
P2O3
P2O5
Explanation:
The correct answer to the question is: All of the above
Q.
Which one of the following serve as aquatic solar fuel cell:
Virus
Bacteria
Algae
Fungi
Explanation:
The correct answer to the question is: Algae
Q.
The Bond Energy of H-F is________?
None
281kJ/mol
456kJ/mol
562kJ/mol
Explanation:
The correct answer to the question is: 562kJ/mol
Q.
Barometer was invented by _______?
Huygen
Torricelli
Newton
Pascal
Explanation:
The correct answer to the question is: Torricelli
Q.
Which of the following do not give aldol condensation reactions ?
formaldehyde
acetaldehyde
diemthyl ketone
propionaldehyde
Explanation:
The correct answer to the question is: formaldehyde
Q.
Electromeric effect is ____________?
Permanent effect
None of the above
Operate due to electronegativity difference
temporary effect
Explanation:
The correct answer to the question is: temporary effect
Q.
In electrolysis of NaCl the product obtained at cathode is_______.
Remain at the bottom of the cell
Chloride ions
Sodium ions
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
Acidic character of amino acids
Non-polar structure of amino acids
Explanation:
The correct answer to the question is: Dipolar character of amino acids
Q.
The composition of brown ring in nitrate test is_________________?
FeSO4.No
FeSO4.No3
FeSO4.No2
FeSO4.N2o
Explanation:
The correct answer to the question is: FeSO4.No
Q.
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
R/4
3R/4
R/2
2 R
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?
SrSO4
MgSO4
BaSO4
CaSO4
Explanation:
The correct answer to the question is: MgSO4
Q.
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
Oxidation reaction
Addition reaction
Substitution reaction
Elimination reaction
Explanation:
The correct answer to the question is: Oxidation reaction
Q.
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
They have greater atomic radii
All
They are more reactive
They have smaller atomic sizes
Explanation:
The correct answer to the question is: They have smaller atomic sizes
Q.
Hydrogen bonding is present in __________?
Phenol
All of these
Water
Ethyl Alcohol
Explanation:
The correct answer to the question is: All of these
Q.
Chlorine Cl when attached to benzene has________?
-1 and +R effect
+1 and -R effect
-I and -R effect
+I and +R effect
Explanation:
The correct answer to the question is: -1 and +R effect
Q.
Compound containing two halogen atoms on two adjacent carbon atoms are called as ___________?
Glycols
Diols
Vicinal dihalides
Geminal dihalides
Explanation:
The correct answer to the question is: Vicinal dihalides
Q.
The colour of chlorine gas is_______________?
freenish yellow
grayish black
pale yellow
reddish brown
Explanation:
The correct answer to the question is: freenish yellow