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Top Chemistry MCQS Questions
Q.
Transition temperature for tin grey & tin white is : _____________?
128.15°C
246.12°C
96°C
18°C
Explanation:
The correct answer to the question is: 18°C
Q.
Beillstein test is used for________?
N2
CO
CO2
Cl
Explanation:
The correct answer to the question is: Cl
Q.
Main use of salt in diet is to : ___________?
inclease solubility of food particles in water
increase the taste
produce small amount of hydrochloric acid required for digestion
ease the process of cooking
Explanation:
The correct answer to the question is: produce small amount of hydrochloric acid required for digestion
Q.
Quantum numbers are __________ ?
Numerical values
Logical values
Arithmetical values
Leometric 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 ?
Cu
A1
Cr
Ni
Explanation:
The correct answer to the question is: A1
Q.
The concept of ensemble was introduced by____________?
Gibbs
Carnot
Boltzmann
Mexwell
Explanation:
The correct answer to the question is: Gibbs
Q.
Which of the following is used in photography?
Na2S
Na2SO3
Na2S2O3
NaHSO3
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
Acetone
Ethyl alcohol
Acetaldehyde
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
The number of molecules taking part in the rate determining step is called___________________?
Extent of a reaction
Order of reaction
Rate of reaction
Mole of a reaction
Explanation:
The correct answer to the question is: Order of reaction
Q.
The Clemmenson reduction of acetone yields
Propane
Ethanal
Ethanol
Propanol
Explanation:
The correct answer to the question is: Propane
Q.
One of the outstanding features of boron is its ability to form__________________?
Molecular crystals
Semiconductors
Ionic compounds
Molecular addition compounds
Explanation:
The correct answer to the question is: Molecular addition compounds
Q.
__________ is one of the allotropic modifications of carbon.
Diamond
Iodine
Silicon
Graphite
Explanation:
The correct answer to the question is: Diamond
Q.
Which of the following statement is correct ?
size of Cl atoms > Cl- ion
Cl- < Na+
size of Na atom < Na+ ion
size of Na+ ion < Na atom
Explanation:
The correct answer to the question is: size of Na+ ion < Na atom
Q.
Basicity of orthophosphoric acid is________?
3
5
4
2
Explanation:
The correct answer to the question is: 3
Q.
Which one of the following carbonate is water insoluble ?
Na2CO3
CaCO3
K2CO3
(NH4)2CO3
Explanation:
The correct answer to the question is: CaCO3
Q.
The molecular formula of Sucrose(Sugar) is___________?
CH
CHO
NH
CHO
Explanation:
The correct answer to the question is: CHO
Q.
Ammonium cynanate was 1st Inorganic compound that was converted into an Organic compound (in Lab) through boiling water. The organic compound was____.
Urea
Ethanol
Methane
Acetic acid
Explanation:
The correct answer to the question is: Urea
Q.
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Resonance effect
Isomeric effect
Intermolecular H-bonding
Inductive effect
Explanation:
The correct answer to the question is: Intermolecular H-bonding
Q.
Which of the following shows inert pair effect ?
silicon
carbon
tin
boron
Explanation:
The correct answer to the question is: tin
Q.
Which one can form complex ?
Li
Na
Cr
K
Explanation:
The correct answer to the question is: Li
Q.
The strongest hydrogen bonding is present in: _____________?
Ammonia gas
Ice
Acetone and chloroform
Ethanol
Explanation:
The correct answer to the question is: Ice
Q.
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Reduction
Decomposition
Oxidation
Both b & c
Explanation:
The correct answer to the question is: Both b & c
Q.
Which one is natron ?
Na2CO3
Na2CO3.H2O
Na2CO3.10H2O
NaHCO3
Explanation:
The correct answer to the question is: Na2CO3.H2O
Q.
Radiations are harmful as it:___________?
Causes anemia
Alters body tissue
Causes skin cancer
is unstable
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-Br
C-C
C-I
Explanation:
The correct answer to the question is: C-F
Q.
In water molecule, Hydrogen & water are held together by ______ bond.
Ionic
Covalent
Hydrogen
Dating
Explanation:
The correct answer to the question is: Covalent
Q.
Which of the halogen can displace other three elements ?
Chlorine
Flourine
Iodine
Bromine
Explanation:
The correct answer to the question is: Flourine
Q.
A process in which large molecules are broken up into into smaller molecules is called as_____.
Cracking
Isomerization
Refining
Reforming
Explanation:
The correct answer to the question is: Cracking
Q.
Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
formaldehyde
carbondioxide
acetaldehyde
propanone
Explanation:
The correct answer to the question is: carbondioxide
Q.
The ore CaSO4.H2O has the general name_______________?
Plaster of Paris
Calcite
Gypsum
Dolomite
Explanation:
The correct answer to the question is: Gypsum
Q.
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
additional polymertization
elimination
condensation polymerization
oxidation
Explanation:
The correct answer to the question is: condensation polymerization
Q.
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
Boyle’s law
Graham’s Law
None of these
Gay-Lussac’s law
Explanation:
The correct answer to the question is: Graham’s Law
Q.
Identify the correct statement regarding CO_______________?
it reacts with red blood cells of haemoglobin
it is powerful oxidizing agent
it is used to prepare aerated drinks
it combines with H2O to form carbonic acid
Explanation:
The correct answer to the question is: it reacts with red blood cells of haemoglobin
Q.
Treatment of sucrose with conc. HNO3 gives__________?
Nitrosucrose
Glucose+ fructose
Laevulinic acid
Oxalic acid
Explanation:
The correct answer to the question is: Nitrosucrose
Q.
Ethers show functional group isomerism with __________________?
aldehydes
carboxylic acid
ketones
alcohols
Explanation:
The correct answer to the question is: alcohols
Q.
which of the following is a non-crystalline solid pair?
sucrose. glass
glass, table salt
diamond, wood
wood, glass
Explanation:
The correct answer to the question is: wood, glass
Q.
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
2 moles of butane
1 mole of ethane
1 mole of butane
2 moles of ethane
Explanation:
The correct answer to the question is: 1 mole of butane
Q.
Polyethylene Glycols are used in the preparation of which type of detergents?
Non-ionic detergents soap
Anionic detergents
Cationic detergents
All of above
Explanation:
The correct answer to the question is: Non-ionic detergents soap
Q.
Phenol was isolated by Runge from________________?
vegetable oil
wood
coaltar
none of these
Explanation:
The correct answer to the question is: coaltar
Q.
Out of Alkane, Alkene & Alkyne, which one is more acidic?
All have same
Alkene
Alkyne
Alkane
Explanation:
The correct answer to the question is: Alkyne
Q.
The coloured glassy mass in borax bead test is due to the formation of___________________?
metal silicate
metal boride
metal borate
metal meta borate
Explanation:
The correct answer to the question is: metal meta borate
Q.
The radiations with highest speed are _______.
Gamma radiations
Beta radiations
Alpha radiations
AOT
Explanation:
The correct answer to the question is: Gamma radiations
Q.
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
Nitriding
Quenching
Tempering
Annealing
Explanation:
The correct answer to the question is: Annealing
Q.
If volumetric analysis methyl orange indicator is used when_________?
Bade is strong
Acid is weak
Acid is strong
Acid is strong base is weak
Explanation:
The correct answer to the question is: Acid is strong
Q.
The weight of a metal of equivalent of 12 which will give 0.475g of its chloride is_______?
0.12g
0.16g
0.24g
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?
0.25 m sucrose
0.20 m NaCl
0.20 m glucose
0.15 m CaCl2
Explanation:
The correct answer to the question is: 0.15 m CaCl2
Q.
The formula of palmitic acid_________________?
C13H27COOH
C17H35COOH
C15H31COOH
C17H33COOH
Explanation:
The correct answer to the question is: C15H31COOH
Q.
Which one of the following is not an alkali metal ?
Rubidium
Francium
Caesium
Radium
Explanation:
The correct answer to the question is: Radium
Q.
Who discovered carbohydrates fats and proteins?
Walter Bradford Cannon
Jons Jacob Berzelius
William Prout
Anselme Payen
Explanation:
The correct answer to the question is: William Prout
Q.
During electrolysis of Water, the product obtained at cathode is ___________?
Only oxygen
Oxygen Gas &Water
Hydrogen Gas &Water
Only Water
Explanation:
The correct answer to the question is: Hydrogen Gas &Water
Q.
Which of the following is the weakest reducing agent ?
HF
HBr
HC
HI
Explanation:
The correct answer to the question is: HF
Q.
During sulphonation of benzene H2SO4 generates the electrophile _________________?
SO3
HSO4-
SO2
H+
Explanation:
The correct answer to the question is: SO3
Q.
Size of colloidal particles
None of These
In b/w true solution & suspension
greater than suspension
greater than true solution
Explanation:
The correct answer to the question is: In b/w true solution & suspension
Q.
Which of the following statements is incorrect about fluorine_______________?
both B and C
fluorine is restricted to -1 oxidation state
fluorine follows octet rule and as well as extended octet rule
fluorine has lowest dissociation energy among the halogens
Explanation:
The correct answer to the question is: both B and C
Q.
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
ethanol
acetic acid
methanoic acid
carbonic acid
Explanation:
The correct answer to the question is: acetic acid
Q.
Antiseptic Urotropine formed by ____________?
Carboxylic acid
Formaldehyde
Ketone
Acetaldehyde
Explanation:
The correct answer to the question is: Formaldehyde
Q.
Hydrogenolysis results in the formation of________________?
alkane
alkyne
aldehydes
alkene
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 Fehling solution
reaction with 2 4 dinitrophenyl hydrazine
reaction with HCN
Explanation:
The correct answer to the question is: reaction with Fehling solution
Q.
Which one is Chloroform_________________?
CHCl3
CH3Cl
CCl4
CH2Cl2
Explanation:
The correct answer to the question is: CHCl3
Q.
Which of the following is not the name of any scientist?
Aufbau’s principle
Hund’s rule
Le-Chatelier’s principle
Pauli exclusion principle
Explanation:
The correct answer to the question is: Aufbau’s principle
Q.
Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?
Clemmenson reduction
Dows process
Friedel & Craft acylation
Friedel & Craft alkylation
Explanation:
The correct answer to the question is: Friedel & Craft alkylation
Q.
Methyl alcohol is not used__________________?
As a solvent
As a substitute for petrol
For denaturing of ethyl alcohol
As an antifreezing agent
Explanation:
The correct answer to the question is: As a substitute for petrol
Q.
Phonon is Quantum of___________?
Electromagnetic wave
Elastic wave
Transverse wave
Longitudinal wave
Explanation:
The correct answer to the question is: Elastic wave
Q.
Aluminium oxide is_________________?
Amphoteric oxide
Basic oxide
It does not exists
Acidic oxide
Explanation:
The correct answer to the question is: Amphoteric oxide
Q.
Which one of the following is also known as lactic acid ?
3-Hydroxy propanoic acid
2-hydroxy butanoic acid
2-Hydroxy propanoic acid
3-hydroxy butanoic acid
Explanation:
The correct answer to the question is: 2-Hydroxy propanoic acid
Q.
How much solar flux absorb by earth’s surface is used to drive hydrologic cycle:
1/2sec
1/4th
1/3rd
1/5th
Explanation:
The correct answer to the question is: 1/3rd
Q.
Ncleophilic addition reactions are catalysed__________________?
Acid
None
Both A and B
Base
Explanation:
The correct answer to the question is: Both A and B
Q.
Oxidation state +1 for phosphorous is found in___________?
H3PO3
H3PO4
H3PO2
H2P2O7
Explanation:
The correct answer to the question is: H3PO2
Q.
In Dry cell, cathode is made up of_______?
MnO²(Pyrolusite)
Zinc
Carbon (Graphite)
ZnCl²
Explanation:
The correct answer to the question is: Carbon (Graphite)
Q.
Which one of the following is termed as benzul alcohol ?
C6H5COOH
C6H5CH(OH)2
C6H5OH
C6H5CH2OH
Explanation:
The correct answer to the question is: C6H5CH2OH
Q.
Which of the following substances does not give iodoform test ?
acetone
ethyl alcohol
methyl alcohol
acetaldehyde
Explanation:
The correct answer to the question is: methyl alcohol
Q.
The purpose of Smelting an ore is to________?
Separate volatile impurities
Obtain an alloy
Reduce it
Oxidize it
Explanation:
The correct answer to the question is: Reduce it
Q.
On reduction with LiAlH4 ,Ketone gives__________?
Secondary Alcohol
None of These
Tertiary alcohol
Primary Alcohol
Explanation:
The correct answer to the question is: Secondary Alcohol
Q.
Which one of the following methods will not give benzene ?
Hydrolysis of benzene sulphonic acid with super heated steam
Distilling phenol with Zn dust
Chlorobenzene with NaOH at 360°C & 150atm.
Heating sod. Salt of Benzoic acid with soda lime
Explanation:
The correct answer to the question is: Chlorobenzene with NaOH at 360°C & 150atm.
Q.
Bromine can be liberated from KBr solution by the action of _______________?
NaCl
Chlorine
Iodine solution
Ki
Explanation:
The correct answer to the question is: Chlorine
Q.
Methyl radical is ___________?
Sp2 hybrid having 6 electron
Sp3 hybrid having 8 electrons
Sp hybrid having linear geometry
sp2 hybrid having 7 electron
Explanation:
The correct answer to the question is: sp2 hybrid having 7 electron
Q.
Give Electronic configuration of Sodium:
1s2,2s2,2p6
1s2,2s2,2p6,3s1
None of these
1s2,2s2,2p6,3s2
Explanation:
The correct answer to the question is: 1s2,2s2,2p6,3s1
Q.
The most electronegative element among the following is_________________?
Sb
P
N
As
Explanation:
The correct answer to the question is: N
Q.
A theoretical link between quantum mechanics and thermodynamics is_________?
Electrchemistry
Statistical thermodynamics
Soectroscopic analysis
Matrix mechanics
Explanation:
The correct answer to the question is: Statistical thermodynamics
Q.
Which of the following has lowest lattice energy?
CsI
LiF
KBr
NaCl
Explanation:
The correct answer to the question is: CsI
Q.
Ketones and Aldehydes are differentiate by using ______________?
Fehling solution
Nitroprusside test
Silver Mirror test
Bendict solution
Explanation:
The correct answer to the question is: Nitroprusside test
Q.
Nitration of chlorobenzene gives___________________?
m – chloronitrobenzene
p – chloronitrobenzene
A & B
o – chloronitrobenzene
Explanation:
The correct answer to the question is: A & B
Q.
What is the molecular Weight of Nitric acid (HNO3 ) ?
70.012 g/mol
63.012 g/mol
65.012 g/mol
81.011 g/mol
Explanation:
The correct answer to the question is: 63.012 g/mol
Q.
Which of the following will be acidic_____________?
propyne
1-butyne
all of the above
ethyne
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following is soluble in water?
AgCl
AgBr
AgI
AgF
Explanation:
The correct answer to the question is: AgF
Q.
How many electrons are there in benzene to form delocalized electron cloud________________?
8
4
6
3
Explanation:
The correct answer to the question is: 6
Q.
Which of the following is different with respect to physical appearance ?
Arsenic
Phosphorus
Bismuth
Antimony
Explanation:
The correct answer to the question is: Phosphorus
Q.
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
branched-alkane
iso-alkane
normal-alkane
neo-alkane
Explanation:
The correct answer to the question is: iso-alkane
Q.
Molozonide is unstable and changes into ozonide on_________________?
rearrangement
hydrolysis
oxidation
reduction
Explanation:
The correct answer to the question is: rearrangement
Q.
Which one of following is not a property of pure quartz ?
Brittle
Hard
Coloured solid
All of above
Explanation:
The correct answer to the question is: Coloured solid
Q.
SO2 reacts with Cl in sunlight to form__________?
Sulphur dioxide
Sulphuryl chloride
All of the above
Suphanyl chloride
Explanation:
The correct answer to the question is: Sulphuryl chloride
Q.
The IUPAC suffix used for _______ NC group?
Cyanide
Carbylamines
Isocyanides
Nitrile
Explanation:
The correct answer to the question is: Nitrile
Q.
Identify among the following elements that does NOT belong to VIIA group
N
Br
F
Cl
Explanation:
The correct answer to the question is: N
Q.
The theory which explains the behavior of particles of matter in motion is called ______?
Bohr’s Theory
Kinetic Molecular Theory
Dalton’s Theory
None
Explanation:
The correct answer to the question is: Kinetic Molecular Theory
Q.
The range of acid PH on PH scale is____________?
6 to 7
9 to 8
1 to 6
1 to 10
Explanation:
The correct answer to the question is: 1 to 6
Q.
Which of the following is a symmetrical ketone___________________?
2-pentanone
butanone
3 – hexanone
acetone
Explanation:
The correct answer to the question is: acetone
Q.
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
Sulphur
Fluorine
Bromine
Chlorine
Explanation:
The correct answer to the question is: Sulphur
Q.
Among the halogens the rare element is________________?
Astatine
Iodine
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Astatine
Q.
An organic compound has a triple bond and not double bond. It can be tested by __________?
Fehling solution
Bayer’s reagent
Bromine water
Ammonical silver nitrate
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
The system which exchange only energy with its surroundings is called______________?
All of the above
Open system
closed system
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__________?
Double
Half
Same
Four times
Explanation:
The correct answer to the question is: Double
Q.
Cyclone collector is used for minimizing:____________-?
Soil pollution
Water pollution
Air pollution
Sound pollution
Explanation:
The correct answer to the question is: Air pollution
Q.
Which of the following noble gases is not present in atmosphere?
Argon
Helium
Radon
Xenon
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
None of the above
SbF3 is used for manufacture of pottery
Cu F2 is used in ceramic industry
Explanation:
The correct answer to the question is: None of the above
Q.
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
To produce alloy
As nitrometer
As insulator
To remove air bubbles from molten metal
Explanation:
The correct answer to the question is: To remove air bubbles from molten metal
Q.
Gypsum is applied to the soil as a source of________________?
Ca and P
we could not apply
S and P
Ca and S
Explanation:
The correct answer to the question is: Ca and S
Q.
Which of the following is more acidic in nature?
Aniline
Cresol
Benzene
Phenol
Explanation:
The correct answer to the question is: Phenol
Q.
The number of lone pairs in XeOF4 is_________?
O
2
1
3
Explanation:
The correct answer to the question is: 1
Q.
Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?
Free radicals
Cosmic rays
UV -rays
Nitrogen oxides
Explanation:
The correct answer to the question is: UV -rays
Q.
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
C6H18O3
C6H12O6
C2H5O
C2H6O
Explanation:
The correct answer to the question is: C6H18O3
Q.
Biodegradable pollutant is:_____________?
Aluminum foil
Domestic waste
DDT
mercury salt
Explanation:
The correct answer to the question is: Domestic waste
Q.
Azimuthal quantum number defines___________?
Magnetic momentum of an electron
Angular momentum of an electron
Spin of an electron
e/m ratio of an electron
Explanation:
The correct answer to the question is: Angular momentum of an electron
Q.
The product On the oxidation of 2°Alcohol is ________?
Aldehyde
Carboxylic acid
Ketone
Ester
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______?
CaSO4,2H2O
CaSO4.3H2O
CaSO4.1/2H2O
CaSO4
Explanation:
The correct answer to the question is: CaSO4,2H2O
Q.
BeCl2 has the hybrid orbitaks of type_______?
dsp2
Sp2
Sp
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 ___________?
a & c
Alkanes
Alkenes
Alkynes
Explanation:
The correct answer to the question is: Alkanes
Q.
Cassiterite is an ore of_______?
Mn
Ni
Sb
Sn
Explanation:
The correct answer to the question is: Sn
Q.
Identify the Molecular mass for Glucose (C6H12O6) among the following.
98amu
180amu
188amu
190amu
Explanation:
The correct answer to the question is: 180amu
Q.
Mass spectroscopy mainly tells about ____________?
None of These
Mass
e/m ratio
Isotopes
Explanation:
The correct answer to the question is: e/m ratio
Q.
Absolute alcohol is obtained when rectified spirit is treated with__________________?
Ca(OH)2
CaCO3
CaCl2
CaO
Explanation:
The correct answer to the question is: CaO
Q.
The process of aluminium extraction is called__________________?
Thermite process
Haber process
Contact process
Hall process
Explanation:
The correct answer to the question is: Hall process
Q.
Ozonolysis of benzene produces___________________?
Both B & C
Glycol
Glyoxal
Vicinal diol
Explanation:
The correct answer to the question is: Glyoxal
Q.
Atom is the smallest particall which is_________?
Indivisible
Both
Divisible
Non of these
Explanation:
The correct answer to the question is: Indivisible
Q.
Kipps Apparatus is used to prepare_________?
H²S
Cl²
NaOH
Cu
Explanation:
The correct answer to the question is: H²S
Q.
Which of the following haloalkane is hydrolysed by SN1 mechanism?
(CH3)3CBr
CH3Br
CH3CH2Br
CH3CH2CH2Br
Explanation:
The correct answer to the question is: (CH3)3CBr
Q.
Effective volume is usually taken for ____________ ?
1 mole of gas
5 moles of gas
2 moles of gas
3moles of gas
Explanation:
The correct answer to the question is: 1 mole of gas
Q.
Aqueous solution of borax above 62°C gives crystals of________________?
Na2B4O7.2H2O
Na2B4O7.5H2O
Na2B4O7.10H2O
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
1.65 g/L
None of the above
1.68 g/L
Explanation:
The correct answer to the question is: 1.68 g/L
Q.
Which of the following element has the maximum electron affinity_____?
Cl
I
Br
F
Explanation:
The correct answer to the question is: Cl
Q.
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
50%
8%
52%
60%
Explanation:
The correct answer to the question is: 52%
Q.
During Electrolysis of Water the product @cathode obtained is ___________?
CO & Water
Hydrogen & Carbon monoxide
Hydrogen Gas & Water
Oxygen 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______.
Thermal decomposition
liquification process
Fragmentation
Bosch Process
Explanation:
The correct answer to the question is: Bosch Process
Q.
Chemistry is given from ……language ?
Greek
Arabic
None of these
Latin
Explanation:
The correct answer to the question is: Greek
Q.
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
OH-
O
H+
H2O
Explanation:
The correct answer to the question is: H2O
Q.
When limestone reacts with water, which gas is released?
Oxygen
Carbon Dioxide
Nitrogen
Hydrogen
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
Alpha rays
Canal rays
Explanation:
The correct answer to the question is: Canal rays
Q.
Downs cell is used to prepare_________________?
Sodium bicarbonate
Sodium hydroxide
Sodium metal
Sodium carbonate
Explanation:
The correct answer to the question is: Sodium metal
Q.
Aniline is a derivative of benzene which contains__________________?
Amide group
Amino 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?
A
Cr
Fe
All of the above
Explanation:
The correct answer to the question is: All of the above
Q.
Special features of borate glass is that it is_________________?
Green in colour
Used to prepare chemical garden
Low melting
Heat resistant
Explanation:
The correct answer to the question is: Heat resistant
Q.
The carbon atom of carbonyl group is__________________?
cp3 hybridized
sp2 hybridized
dsp2 hybridized
sp hybridized
Explanation:
The correct answer to the question is: sp2 hybridized
Q.
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
All of above
Primary alcohol
Tertiary alcohol
Secondary 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____________________?
ethyl halide
ethene
all of the above are possible
ethyne
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
Theoretical yield
Practical yield
NOT
Explanation:
The correct answer to the question is: Theoretical yield
Q.
K2Cr2O7/H2SO4 generate____________________?
Oxygen
Hydrogen
Nascent hydrogen[H]
Nascent oxygen[O]
Explanation:
The correct answer to the question is: Nascent oxygen[O]
Q.
The science of fermentation is called _______ ?
Zootaxy
Zygology
Zymology
Zymurgy
Explanation:
The correct answer to the question is: Zymology
Q.
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
ethylene epoxide
ketone
both A & C
formaldehyde
Explanation:
The correct answer to the question is: both A & C
Q.
What is the mass of one mole of Iodine?
254g
53g
74g
127g
Explanation:
The correct answer to the question is: 254g
Q.
The formula C6H5-CO-CH3 represents_______ ?
Phenyl acetate
Acetic acid
Acetone
Acetophenone
Explanation:
The correct answer to the question is: Acetophenone
Q.
Which of the following is used with milk of lime to kill fungus and molds?
Chlorine
Silver nitrate
Nitric acid
Copper Sulfate
Explanation:
The correct answer to the question is: Copper Sulfate
Q.
The stationary and mobile phases in paper chromatography are____________?
Solid/liquid
Liquid/gas
Liquid/solid
Liquid/liquid
Explanation:
The correct answer to the question is: Solid/liquid
Q.
R-Mg-Br is called___________________?
Both A & B
Grignard reagent
Alkyl
Metallic alkyl halide
Explanation:
The correct answer to the question is: Both A & B
Q.
Benzene does not undergo___________________?
Oxidation reactions
Polymerization reactions
Addition reaction
Substitution reaction
Explanation:
The correct answer to the question is: Polymerization reactions
Q.
When alcohol reacts with phosphorous halides it geive____________________?
alkyl halides
alkanes
alkynes
alkyl amine
Explanation:
The correct answer to the question is: alkyl halides
Q.
The bond length of C=C is___________?
1.54A°
1.34A°
1.68A°
1.20A°
Explanation:
The correct answer to the question is: 1.68A°
Q.
Universe is almost 70% made up of __________?
Helium
Hydrogen
Carbon
Chlorine
Explanation:
The correct answer to the question is: Hydrogen
Q.
Which of the following is unit of Viscosity?
Decibell
Torr
Poise
Hertz
Explanation:
The correct answer to the question is: Poise
Q.
Fehling solution react with HCHO to form precipitate of _____________?
Red colour
Blue colour
Yellow colour
White colour
Explanation:
The correct answer to the question is: Red colour
Q.
Nitronium ion is___________________?
NO3
NO2-
NO
NO2+
Explanation:
The correct answer to the question is: NO2+
Q.
Silver mirror is a test for ____________?
Ethers
Amines
Thio alcohols
Aldehydes
Explanation:
The correct answer to the question is: Aldehydes
Q.
What is the formula of Copper Sulfate?
CuSO3.4H2O
CuSO4.4H2O
CuSO4.5H2O
CuSO3.5H2O
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
Vander Waals forces are stronger in_______________?
F2
Br2
I2
Cl2
Explanation:
The correct answer to the question is: I2
Q.
Element that have same number of neutrons are called__________?
None of these
isotope
isotone
isobar
Explanation:
The correct answer to the question is: isotone
Q.
Which one of the following compound does not have – OH group___________________?
ethyl acetate
picric acid
ethylene glycol
glycerol
Explanation:
The correct answer to the question is: ethyl acetate
Q.
The halogen having highest electron affinity is_____________________?
Bromine
Iodine
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Chlorine
Q.
The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
PCI3
PCI5
SOCl2 / Pyridine
Zn / HCI
Explanation:
The correct answer to the question is: SOCl2 / Pyridine
Q.
The deliquescence is a property in which a solid____________________?
Increases the number of water of crystallization
Absorbs moisture and turns to liquid form
Absorbs moisture and remains solid
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
CnH2n-2
CnH2n+1
CnH2n+2
Explanation:
The correct answer to the question is: CnH2n
Q.
Oxalate ion behaves as a ________ ligand.
Bidentate
Unidentate
Tridentate
Hexadentate
Explanation:
The correct answer to the question is: Bidentate
Q.
Clemmensens reduction infolves the reduction of___________________?
ketone
aldehyde
all of the above
alkane
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following does not contain phosphorus ?
Steel
Yolk of egg
Bone
Nerves
Explanation:
The correct answer to the question is: Steel
Q.
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
Carbon=0, Oxygen=0
Carbon= +1, Oxygen= -1
Carbon=0, Oxygen= -1
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__________?
Aquatic plants
None of these
Forest residues
Animal wastes
Explanation:
The correct answer to the question is: Animal wastes
Q.
Electrolysis of dilute solution of NaCl results at the anode_______________?
hydrogen
oxygen
sodium
chlorine
Explanation:
The correct answer to the question is: oxygen
Q.
The Boiling Point of Ethyl Alcohol is_________?
73°C
58°C
56°C
78°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 _____________?
nylon 6-6
PVC
Orlon
Polyethylene
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
Nitrogen tank
Oxygen tank
Hydrogen tank
None of these
Explanation:
The correct answer to the question is: Oxygen tank
Q.
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
propanoic acid
propanal
propanol
propane
Explanation:
The correct answer to the question is: propanoic acid
Q.
Methanol can be obtained from_________________?
methane
water gas
destructive distillation of wood
all
Explanation:
The correct answer to the question is: all
Q.
An acid-Base Reaction is always a/an __________?
Fission
Fusion
Endothermic
Exothermic
Explanation:
The correct answer to the question is: Exothermic
Q.
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Charles’ Law
Avogadro’s Law
Graham’s Law
Boyle’s law
Explanation:
The correct answer to the question is: Charles’ Law
Q.
Arsenic oxides are removed by passing through_________________?
Sodium hydroxide
Ferric hydroxide
Aluminium hydroxide
Calcium hydroxide
Explanation:
The correct answer to the question is: Ferric hydroxide
Q.
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
secondary alcohol
dihydric alcohol
tertiary alcohol
primary alcohol
Explanation:
The correct answer to the question is: primary alcohol
Q.
Which compound is also known by the name of carbolic acid ?
H2CO3
H3PO3
C6H5OH
C2H2OH
Explanation:
The correct answer to the question is: C6H5OH
Q.
The blotting paper helps observe liquid by__________?
Surface Action
Boldness
Viscosity
Capillary Action
Explanation:
The correct answer to the question is: Capillary Action
Q.
Which group contains elements that exist as monoatomic molecule?
14
2
18
1
Explanation:
The correct answer to the question is: 18
Q.
The ether used in Wurtz synthesis is__________________?
dry
aqueous
basic
acidic
Explanation:
The correct answer to the question is: dry
Q.
Bosch Process involves _______?
Reduction
Oxidation
Crackling
Isomerization
Explanation:
The correct answer to the question is: Oxidation
Q.
Value of normal atmospheric pressure at sea level at 0°C is______?
760 Torr
All of these
1 atm
76cm of Hg
Explanation:
The correct answer to the question is: All of these
Q.
d-block elements are also called as __________?
Outer Transition
Both B & C
Inner Transition
Alkali Metals
Explanation:
The correct answer to the question is: Outer Transition
Q.
The carbon-carbon bond strength is maximum in__________?
Cyclohexane
CH2=CH2
CH3CH3
Benzene
Explanation:
The correct answer to the question is: CH3CH3
Q.
The criteria for aromaticity is presence of_________?
Unsaturations
Presence of 4n+2π electrons
Presence of 4nπ electrons
Cyclic structure
Explanation:
The correct answer to the question is: Presence of 4n+2π electrons
Q.
Which set of quantum numbers is not allowed?
n=2,l=0,m1=0,ms=-1/2
n=2,l=1,m1=0,ms=+1/2
n=2,l=2,m1=1,ms=-1/2
n=2,l=1,m1=-1,ms=+1/2
Explanation:
The correct answer to the question is: n=2,l=2,m1=1,ms=-1/2
Q.
Which of the following orbitals has maximum penetration effect?
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
NH3
H+
Br+
Explanation:
The correct answer to the question is: NH3
Q.
Compounds of nitrogen and phosphorus are mostly________________?
ionic
covalent
all varieties are possible
polar
Explanation:
The correct answer to the question is: covalent
Q.
Which one of the following is not the use of graphite ?
Lead pencils
Abrasive
Lubricant
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 ?
Citric acid
Benzoic acid
Oxalic acid
Tartaric acid
Explanation:
The correct answer to the question is: Citric acid
Q.
What is chemical symbol for Tungsten?
Tn
Z
T
W
Explanation:
The correct answer to the question is: W
Q.
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
Both A and B
none
steric hindrance
alkyl groups are electron donating
Explanation:
The correct answer to the question is: Both A and B
Q.
Shiff’s reagent gives pink color with ____________?
Acetaldehyde
Acetone
Acetic acid
Methyl acetate
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
Which of the following compounds is not soluble in HNO3___?
PbS
AgCl
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__________?
0.6N HSO
12 moles of KMnO
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 __________?
Reforming
Refining
Cracking
None of These
Explanation:
The correct answer to the question is: Reforming
Q.
Actinides are the elements with atomic number from:
89 to 103
36 to 43
97 to 104
101 to 115
Explanation:
The correct answer to the question is: 89 to 103
Q.
Which one of the following compounds usually smells like garlic ?
All have same smell
P2O5
P2O3
H3PO3
Explanation:
The correct answer to the question is: P2O3
Q.
What is the molecular formula of Benzenetriozonide ?
C6H6O6
C6H5O9
C6H5O8
C6H6O9
Explanation:
The correct answer to the question is: C6H6O9
Q.
Addition of 2% gypsum in cement________________?
Triggers hydration
Prevents rapid hardening
Triggers hydrolysis
all of the above
Explanation:
The correct answer to the question is: Prevents rapid hardening
Q.
Neoprene is _______________?
All of the above
Natural rubber
synthetic rubber
Vulcanized rubber
Explanation:
The correct answer to the question is: synthetic rubber
Q.
SO3 is not absorbed in water directly because__________________?
Reaction is exothermic
It is insoluble in water
All of above
Dilute acid is produced
Explanation:
The correct answer to the question is: Reaction is exothermic
Q.
Sum of protons and neutrons in an atom gives off _________ ?
Mass number
Nucleon numbera
Both A and B
Atomic number
Explanation:
The correct answer to the question is: Both A and B
Q.
For the reaction 2HI ____________> H2+ I2
Kp= kc
Kc > kp
Kp > kc
Kp ≤ kc
Explanation:
The correct answer to the question is: Kp= kc
Q.
In SI base units, 1 Bq is equal to __________ ?
0.01 disintegration per second
1.5 disintegration per second
1 disintegration per second
10 disintegration per second
Explanation:
The correct answer to the question is: 1 disintegration per second
Q.
If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
Extra heat is spread in the air
The forces of attractions become stronger
High energy molecules continuously leaving the surface of liquid
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?
Argon
Helium
Neon
Methane
Explanation:
The correct answer to the question is: Argon
Q.
Which is methyl cyanide_________________?
CH2 = CH – CN
CH3NO2
CH3NH2
CH3CN
Explanation:
The correct answer to the question is: CH3CN
Q.
Carboxylic acid on reduction with HI / phosphorous yields_________________?
alcohols
alkane
ketones
aldehydes
Explanation:
The correct answer to the question is: alkane
Q.
Cyclopentene is a _________?
None of These
Aromatic
Alicyclic
Aliphatic
Explanation:
The correct answer to the question is: Alicyclic
Q.
Atoms of all the elements always contain in nucleus:
Proton and neutron
Neutron and electron
Proton
Neutron
Explanation:
The correct answer to the question is: Proton
Q.
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
cyclohexanol
cyclohexane
1 – hexanol
n – hexane
Explanation:
The correct answer to the question is: cyclohexanol
Q.
Which of the following is known as absolute zero?
0C°
-273.16C°
273K
273.16C°
Explanation:
The correct answer to the question is: -273.16C°
Q.
Nitrate (NO3) ions are obtained by the process of __________?
Fermentation
Denitrification
None of these
Nitrification
Explanation:
The correct answer to the question is: Nitrification
Q.
Coinage metals are actually_________?
Halogens
Transition metals
Alkali metals
Alkaline earth metals
Explanation:
The correct answer to the question is: Transition metals
Q.
What is the chemical symbol of “Potassium”?
Pt
Po
K
P
Explanation:
The correct answer to the question is: K
Q.
Vulcanized rubber is an example of ______________?
Synthetic polymers
Natural polymers
semisynthetic polymers
None of These
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
25 kilotons
30 kilotons
1.5 kilotons
Explanation:
The correct answer to the question is: 20 kilotons
Q.
Process used to separate insoluble particles from liquids is ___________ ?
Filtration
Extraction
Drying
Sieving
Explanation:
The correct answer to the question is: Filtration
Q.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
Smaller ionic radius of these metals
Smaller electronegativity of alkali metals
De-excitation of electrons from higher energy levels to low energy level
Excitation of electrons from low energy levels to higher energy levels
Explanation:
The correct answer to the question is: De-excitation of electrons from higher energy levels to low energy level
Q.
Boron is non-netal whereas A1 is metal. It is due to_______________________?
Both A and B
High nuclear charge
Small size
No authorized justification yet
Explanation:
The correct answer to the question is: Both A and B
Q.
Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
273 K
546 °C
200°C
546 K
Explanation:
The correct answer to the question is: 546 K
Q.
Oxygen and sulphur resemble in all except________________?
Show same oxidation state
Electronic conviguration of valence shell electrons
Polymeric
Show allotropy
Explanation:
The correct answer to the question is: Show same oxidation state
Q.
Phosphoric acid is a weak acid and its basicity is____________________?
3
1
zero
2
Explanation:
The correct answer to the question is: 3
Q.
Viscosity of a liquid________by increasing temperature?
None
Remains same
Increases
Decreases
Explanation:
The correct answer to the question is: Decreases
Q.
Presence of nitrogen in organic compounds is tested as__________?
Nitrogen gas
CN‾
NO
NH3
Explanation:
The correct answer to the question is: CN‾
Q.
Water molecule is________?
V-shaped
Angular
Triangular planer
Pyramidal
Explanation:
The correct answer to the question is: V-shaped
Q.
Which of the following method is used to separate Hydrogen gas from water Gas?
Bosch Process
Steam process
Palladium process
Cyber Twinkling process
Explanation:
The correct answer to the question is: Bosch Process
Q.
which of the following pair is not distinguished by passing H2S?
Hg, Pb
Zn, Mn
Cd , Pb
As, CD
Explanation:
The correct answer to the question is: Hg, Pb
Q.
The petrol having octane number 80 has ____________?
80% n-heptane + 20% n- octane
20% n- heptane + 80% n-octane
20% n- heptane + 80% iso-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 + CHCHO
CHCHCHO + CHCOOH
CHCHCOOH + CHCOOH
CHCOOH + CO
Explanation:
The correct answer to the question is: CHCHCOOH + CHCOOH
Q.
Carnalite has chemical formula__________________?
CaCO3.MgCO3
Na2B4O7.10H2O
KCI
KCI.MgCl2.6H2O
Explanation:
The correct answer to the question is: KCI.MgCl2.6H2O
Q.
Allotropic form of phosphorus that is poisonous is___________________?
Red
White
Violet
Black
Explanation:
The correct answer to the question is: White
Q.
Dry distillation of calcium acetate results in the formation of_________________?
acetaldehyde
formaldehyde
acetone
methane
Explanation:
The correct answer to the question is: acetone
Q.
The quality of petrol is improved by ____________?
Refining
Reforming
Cracking
Hydration
Explanation:
The correct answer to the question is: Reforming
Q.
In the presence of Zn, Hydrolysis of ozonide of 1-butene gives:_____________?
Ethylene only
Propionaldehyde and Formaldehyde
Acetaldehyde and Formaldehyde
Acetaldehyde only
Explanation:
The correct answer to the question is: Propionaldehyde and Formaldehyde
Q.
Alkenes are produced from dehalogenation of________________?
dihalo alkane
vicinal dihalo alkane
vicinal trihalo alkane
trihalo alkane
Explanation:
The correct answer to the question is: vicinal dihalo alkane
Q.
The hybridization of nitrogen atom in pyridine is_______?
Sp2
It is not hybridized
Sp3
Sp
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______?
Sp3d2- hybridisation
Sp3- hybridisation
Sp2- hybridisation
Sp- hybridisation
Explanation:
The correct answer to the question is: Sp- hybridisation
Q.
The gas used in manufacturing of urea fertilizer__________________?
CH4
C2H6
C2H2
C2H4
Explanation:
The correct answer to the question is: CH4
Q.
What is the color of copper sulfate crystalline?
Brown
Green
Blue
White
Explanation:
The correct answer to the question is: Blue
Q.
Which of the following statements is incorrect about halogens ?
All the halogens have electronic conviguration ns2p5
All are non-metals
All the halogens react with noble gases to form their halides
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 __________?
Remains Same
None of them
Decreases
Increases
Explanation:
The correct answer to the question is: Remains Same
Q.
The pH of milk is_______?
6.5-7
9
8
12
Explanation:
The correct answer to the question is: 6.5-7
Q.
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
700⁰C
1300⁰C
500⁰C
900⁰C
Explanation:
The correct answer to the question is: 700⁰C
Q.
The number of moles are present in 9.5g of CS2?
None of These
1.5
0.25
0.125
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?
CuSO4.5H2O
K2Cr2O7
K2CrO4
AgNO3
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
The given dissociation constant (Ka) value 1.3×10-10 is of_________________?
Phenol
Acetic acid
Water
Alcohol
Explanation:
The correct answer to the question is: Phenol
Q.
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
all above
proteins and oild
fats and proteins
fats and oils
Explanation:
The correct answer to the question is: fats and oils
Q.
Which of the following gases is used for welding?
Ethane
Ethene
Acetylene
Methane
Explanation:
The correct answer to the question is: Acetylene
Q.
Tetraethyl lead is used as______?
Pain Killer
Fire Extinguisher
Mosquito Repellent
Petrol Additive
Explanation:
The correct answer to the question is: Petrol Additive
Q.
Oobleck is the mixture of _________?
Cornstarch and Water
Gram Flour and Water
Baking Soda and Vinegar
Cement 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 ?
ns2p6
ns2p5
ns2p4
ns2p2
Explanation:
The correct answer to the question is: ns2p5
Q.
The volume strength of 1.5 N H2O2 solution is_______?
4.8
5.2
8.4
8.8
Explanation:
The correct answer to the question is: 8.4
Q.
Aldehyde and ketone have same general formula for homologous series_________________?
CnH2n
CnH2nOn+1
CnH2nO2n
CnH2nO
Explanation:
The correct answer to the question is: CnH2nO
Q.
The anhydride of HCIO4 is_________________?
Cl2O7
Cl2O6
Cl2O
ClO2
Explanation:
The correct answer to the question is: Cl2O7
Q.
Bleaching powder is not used for bleaching________________?
Cotton
Costly fabrics
Paper pulb
Linen
Explanation:
The correct answer to the question is: Costly fabrics
Q.
_____________ surfactants perform well over a wide range water hardness and PH?
Nonionic
Cationic
Neutral
Anionic
Explanation:
The correct answer to the question is: Nonionic
Q.
Which of the following reactions may be assoclated with aldehyde and ketone ?
oxidation
nucleophile addition
polymerization
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?
3P
6P
3P/T
P/3
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
Zeolites
Sulphonides
Lime
Explanation:
The correct answer to the question is: Zeolites
Q.
Metal are highly ___________ ?
Electronegativity
Neutral
Electropositive
Both of these
Explanation:
The correct answer to the question is: Electropositive
Q.
The oxidation of secondary alcohol gives ?
ketone
alkane
Acetylene
carboxylic acid
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following is the most Viscous?
Honey
Water
Glycerine
Spirit
Explanation:
The correct answer to the question is: Honey
Q.
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
H2SO4
PCI5
Both A and B
P2O5
Explanation:
The correct answer to the question is: Both A and B
Q.
Carbon,Diamond and Graphite are together called:___________?
Isomorphs
Isomers
Isotopes
Allotrope
Explanation:
The correct answer to the question is: Allotrope
Q.
Position of double bond in an organic compound is determined by ___________?
Ozonolysis
Hydrogenation
Reduction
Oxidation
Explanation:
The correct answer to the question is: Ozonolysis
Q.
Which is used for artificial ripening of fruit ?
methane
ethane
ethene
ethyne
Explanation:
The correct answer to the question is: ethene
Q.
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
Sodium benzoate
N-hexane
acetylene
Benzene sulphonic acid
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?
Be
Cl
K
P
Explanation:
The correct answer to the question is: Be
Q.
The main contributor to toxicity of detergent:
Na-sulphate solution
Na-Chloride solution
K-Chloride solution
Na-Silicate solution
Explanation:
The correct answer to the question is: Na-Silicate solution
Q.
In Periods from Left to right Electronegativity will: _________?
increase
none of these
constant
decrease
Explanation:
The correct answer to the question is: increase
Q.
Formula of Galena is________?
AS2S3
HgS
FeS2
PbS
Explanation:
The correct answer to the question is: PbS
Q.
Glycine is the name of an amino acid because___________________?
Sweet taste
Green colour
Bitter taste
Shining appearance
Explanation:
The correct answer to the question is: Sweet taste
Q.
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
Displacement reaction
Reduction reaction
Disproportionation reaction
Double 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 a natural fertilizer
it is a synthetic fertilizer
it is an inorganic water soluble compound
it provides micronutrients to the plants
Explanation:
The correct answer to the question is: it is a synthetic fertilizer
Q.
What is the order of kinetics in the SN1 mechanism ?
First
Zero
Second
Third
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
Substitution reaction
No-reaction
Addition reaction
Explanation:
The correct answer to the question is: Addition reaction
Q.
What is the molecular weight of Ammonia (NH3) ________ ?
27.033 g/mol
17.031 g/mol
19.031 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
chloroprene
benzene
polyacetylene
Explanation:
The correct answer to the question is: chloroprene
Q.
Ethene is the first member of __________?
Saturated hydrocarbon
Alkenes Family
None of These
Aromatic 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 _________________?
esterification
saponification
neutralization
hydrolysis
Explanation:
The correct answer to the question is: esterification
Q.
Percentage of lead in lead pencil is________?
Zero
70
20
80
Explanation:
The correct answer to the question is: Zero
Q.
Indicate the correct statement__________________?
I2 is a volatile solid
Cl2 is insoluble in water
Br2 is more reactive than Cl2
Cl2 is the strongest oxidizing agent
Explanation:
The correct answer to the question is: I2 is a volatile solid
Q.
The most powerful oxidizing agent among the halogens is__________________?
F2
I2
Cl2
Br2
Explanation:
The correct answer to the question is: F2
Q.
Acetal on acid hydrolysis generates__________________?
Ketone
Both A & B
None of the above
Alcohol
Explanation:
The correct answer to the question is: Both A & B
Q.
Air is a/an _________?
Element
Electrolyte
Compound
Mixture
Explanation:
The correct answer to the question is: Mixture
Q.
The valency of Carbon is _________?
1(univalent)
3(Trivalent)
2(Divalent)
4(Tetravalent)
Explanation:
The correct answer to the question is: 4(Tetravalent)
Q.
Ionic solids do not conduct the electrical current because:
Strong covalent bonds are present in their structure
The coordination number of ion is very high
Ions don’t have translatory motion
Free electrons are less
Explanation:
The correct answer to the question is: Ions don’t have translatory motion
Q.
Positron has __________charge.
+ve
Neutral
None of them
-ve
Explanation:
The correct answer to the question is: +ve
Q.
Reactivity due to pi-electrons is present in_________________?
both B & C
alkane
alkene
alkyne
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 ___________?
110.5 KJ
80.4 KJ
159.6kJ
135.5 KJ
Explanation:
The correct answer to the question is: 159.6kJ
Q.
When SO2 solution is passed over which of the following it turns green?
H2SO4
P2O5
SO3
K2Cr2O7
Explanation:
The correct answer to the question is: K2Cr2O7
Q.
50% inversion of configuration of molecules take place in a___________________?
E1 – reaction
SN1 – reaction
SN2 – reaction
E2 – reaction
Explanation:
The correct answer to the question is: SN1 – reaction
Q.
What is the molecular formula for Nitric acid ________ ?
H2NO4
HN2O2
HNO2
HNO3
Explanation:
The correct answer to the question is: HNO3
Q.
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
p-electrons in CI(Z = 17)
p-electrons in Ne(Z = 10)
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
Explanation:
The correct answer to the question is: p-electrons in CI(Z = 17)
Q.
Crystals of Na2CO3. 10H2O when exposed to air_________________?
Remains unchanged
Lose water and remain solid
Gain water and remain solid
Gain water and become liquid
Explanation:
The correct answer to the question is: Lose water and remain solid
Q.
Which of the following gases shows more ideal behaviour at 0°C___________?
CH4
H2
NH3
He
Explanation:
The correct answer to the question is: He
Q.
Charle’s Law was given by Jacques Charles in_______?
1885
1785
1787
1880
Explanation:
The correct answer to the question is: 1787
Q.
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
FeSiO3———> FeSiO3
CaO+ SiO2——> CaSiO3
2FeS+3O2——–> 2Fe+ SO2
Fe2O3+ 3CO——–> 2Fe+ 3CO2
Explanation:
The correct answer to the question is: Fe2O3+ 3CO——–> 2Fe+ 3CO2
Q.
Which Oxide of Manganese is amphoteric?
MnO2
Mn2O3
MnO
Mn2O7
Explanation:
The correct answer to the question is: MnO2
Q.
Alum is used by dyers of cloth:
fire proofing fabrics
As mordant
Softening of hard water
As water purifier
Explanation:
The correct answer to the question is: As mordant
Q.
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
Hydroxide ions to reach anode
Cathode to decay
All of the above
Chlorine gas to mix
Explanation:
The correct answer to the question is: Hydroxide ions to reach anode
Q.
Chromatography is used to separate _________ ?
Mixtures
Solution
Atoms
Molecules
Explanation:
The correct answer to the question is: Mixtures
Q.
What will be the PH of 0.01M ammonium chloride solution containing 10 mol per liter of ammonium chloride (pkb=4.76)?
8.24
7.24
6.24
5.24
Explanation:
The correct answer to the question is: 8.24
Q.
Which of the following is not a use of silicon ?
Antifreeze
Water repellent
Lubricants
Hydraulic brakes
Explanation:
The correct answer to the question is: Antifreeze
Q.
The absolute value of charge on electron was determined by ________ ?
Chadwick
Robert Millikan
Rutherford
J.J.Thomson
Explanation:
The correct answer to the question is: Robert Millikan
Q.
Calculate % of N in KNO3__________?
14.34%
None of these
18.56%
13.86%
Explanation:
The correct answer to the question is: 13.86%
Q.
Which of the following compounds will react with Tollens reagent ?
CH3-CHO
CH3-COOH
CH3-CO-CH2-CH3
CH3-CH-CH3
Explanation:
The correct answer to the question is: CH3-CHO
Q.
Tetrahydroborate ion is the source of_______________?
H+
proton
H-
both A & amp; B
Explanation:
The correct answer to the question is: H-
Q.
The molecular formula of Methane gas is___________?
NH
CH
CO
CH
Explanation:
The correct answer to the question is: CH
Q.
The Maximum mass of an atom is present in ___________?
Energy levels
Nucleus
Shell
Orbit
Explanation:
The correct answer to the question is: Nucleus
Q.
The octane number of zero is assigned to____________?
3-methyl octane
2-methyl octane
n-heptane
iso-octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Ethanol and methanol can be distinguished by a__________________?
Lucas test
Benedicts test
Iodoform test
Tollens test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Acidic amino acids have________________?
2 carboxylic groups and 1 amino group
2 amino and 2 carboxylic groups
2 amino groups and 1 carboxylic group
1 amino and 1 carboxylic groups
Explanation:
The correct answer to the question is: 2 carboxylic groups and 1 amino group
Q.
Petra means ______ ?
Fuel
Petrol
Rock
Sediment
Explanation:
The correct answer to the question is: Rock
Q.
Oxidation of primary alcohol gives________________?
Ester
Alkene then – COOH
Aldehyde
ketone
Explanation:
The correct answer to the question is: Aldehyde
Q.
Which one is not a nucleophile ?
NH3
H3C+
SCN-
C2H5O-
Explanation:
The correct answer to the question is: H3C+
Q.
The PH of the 1.3 × 10-4 NH4Cl is__________?
2.886
4.0
3.886
1.3
Explanation:
The correct answer to the question is: 3.886
Q.
Example of cross linked polymer is ____________?
Nylon
PVC
Polyester
bakelite
Explanation:
The correct answer to the question is: bakelite
Q.
The best indicator for titrating HCl with NH4OH is: _________?
phenol red
phenopthalein
litmus
methyl Orange
Explanation:
The correct answer to the question is: methyl Orange
Q.
Oxygen does not react with all except_________________?
Alkali
Metals
Acid
Water
Explanation:
The correct answer to the question is: Metals
Q.
Which of the following is more Basic in nature?
1°Alkyl ammine
2° Alkyl ammine
Ammonia
3° Alkyl ammine
Explanation:
The correct answer to the question is: 3° Alkyl ammine
Q.
The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
Xe
CH4
C2H4
CO2
Explanation:
The correct answer to the question is: CO2
Q.
The element of group VIA which is a non-metal is________________?
S
Po
Te
Se
Explanation:
The correct answer to the question is: S
Q.
Which of the following is metasilicic acid ?
H2SnO3
H3SbO4
H3AsO4
H2SiO3
Explanation:
The correct answer to the question is: H2SiO3
Q.
Second ionization potential of alkali metals are very high due to_______________?
being metals
ns1 electronic configuration
being s-block elements
inert gas configurations
Explanation:
The correct answer to the question is: inert gas configurations
Q.
The structure of H2O2 is_______?
Linear
Planar
Spherical
Non- polar
Explanation:
The correct answer to the question is: Non- polar
Q.
Which of the following oxides of iodine is used for quantitative analysis of CO ?
I2O4
All are equally useful
I2O5
I4O2
Explanation:
The correct answer to the question is: I2O5
Q.
Cannizzaros reaction is not given by__________________?
acetaldehyde
trimethyl acetaldehyde
benzaldehyde
formaldehyde
Explanation:
The correct answer to the question is: acetaldehyde
Q.
Which is the strongest acid ?
HCIO3
HCIO2
HCIO
HCIO4
Explanation:
The correct answer to the question is: HCIO4
Q.
In a group, atomic radii increase due to successive increase of _________ ?
Electronic shells
Neutron shells
Nucleus
Proton shells
Explanation:
The correct answer to the question is: Electronic shells
Q.
Which one exhibits aldol condensation____________________?
HCHO
C6H5CHO
CH3COCH3
Cl3CCHO
Explanation:
The correct answer to the question is: CH3COCH3
Q.
The number of ions produced by [Pt(NH3)]Cl2?
5
2
3
4
Explanation:
The correct answer to the question is: 3
Q.
Which electronic configuration corresponds to an element of group IIIA ?
1s2 2s2 2p4
1s2 2s2 2p3
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6 3s2 3p6 4s2 3d1
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p1
Q.
The organic acid that can be made from ethanol is_________________?
Citric acid
Acetic acid
Formic acid
Butanoic acid
Explanation:
The correct answer to the question is: Acetic acid
Q.
Atomic mass of an atom is present in the __________?
Nucleus
Shell
Orbit
Orbital
Explanation:
The correct answer to the question is: Nucleus
Q.
Evaporation is_____________?
Surface Process
All of these.
Continuous Process
Endothermic Reaction
Explanation:
The correct answer to the question is: All of these.
Q.
Ketones and aldehydes can be distinguished using ____________?
Tollens reagent
Fehling solution
Bendict solution
None of These
Explanation:
The correct answer to the question is: Tollens reagent
Q.
What is the chemical name of Oil of Vitriol?
Muriatic Acid
Nitric Acid
Hydrochloric Acid
Sulphuric Acid
Explanation:
The correct answer to the question is: Sulphuric Acid
Q.
Ostwald’s dilution law applicable to:
Weak electrolytes
Non electrolytes
All electrolytes
Strong electrolytes
Explanation:
The correct answer to the question is: Weak electrolytes
Q.
The PH of pure water at 25°C, kw=1×10-4____________?
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?
Osmosis
Buffer
Active transport
Neutralization
Explanation:
The correct answer to the question is: Buffer
Q.
In borax bead test which compound is formed_________?
Meta borate
Double oxide
Ortho burate
Tetra borate
Explanation:
The correct answer to the question is: Meta borate
Q.
Molecular orbital Theory is also called_________?
Antibondingtheory
Bonding theory
Band theory
π and σ bonding theory
Explanation:
The correct answer to the question is: Antibondingtheory
Q.
In which compound of Xenon the oxidation state of Xenon is + 6?
XeOF4
XeOF2
XeF4
Na4XeO6
Explanation:
The correct answer to the question is: XeOF4
Q.
The discovery of neutron became very late because _______ ?
It is a fundamental particle
It is present in nucleus
It does not move
It does not carry any charge
Explanation:
The correct answer to the question is: It does not carry any charge
Q.
Which of the following phenomenon is considered responsible for Global Warming?
Greenhouse effect
Monsoon
Fire in coal mines
Dry farming
Explanation:
The correct answer to the question is: Greenhouse effect
Q.
Stainless steel contains___________?
Cu+C+Ni
Fe+Ni+Cu
Fe+ Cr+Cu
Fe+Cr+Ni
Explanation:
The correct answer to the question is: Fe+Cr+Ni
Q.
The heaviest subatomic particle among the following is_________?
Neutron
All have mass
Electron
Proton
Explanation:
The correct answer to the question is: Neutron
Q.
The whole universe is made up of almost _______of Hydrogen?
70%
80%
50%
60%
Explanation:
The correct answer to the question is: 70%
Q.
Ethyl chloride with nascent hydrogen produces_________________?
propane
butane
ethane
methane
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
Hydrogen Gas
Both at same time
None of them
Explanation:
The correct answer to the question is: None of them
Q.
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Dr.A.Walash
Schwartz
S.E.Manhan
Einstein
Explanation:
The correct answer to the question is: Schwartz
Q.
When Ammonia is used as a refrigerant in vapour compression cycle?
Cu Tubing used
Both a & b
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____________?
Ammonical silver nitrate
Bayer’s reagent
Fehling solution
Bromine water
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
Law of mass action was proposed by Goldberg and Peter Waage in _________?
1888
1864
None of These
1866
Explanation:
The correct answer to the question is: 1864
Q.
Quality of petrol is measured by___________?
octane number
Refining
Reforming
Heptane number
Explanation:
The correct answer to the question is: octane number
Q.
Greater the heat of neutralization the acid will be____________?
More weaker
more stronger
Not related to acid strength
None of the above
Explanation:
The correct answer to the question is: more stronger
Q.
The mass of 3.2 moles of ammonia (NH3) gas?
56.4 grams
53.4 grams
55.4 grams
54.4 grams
Explanation:
The correct answer to the question is: 54.4 grams
Q.
I3( Tri-iodine) has shape_________?
Square bipyramidal
Both A and C
Linear
Trigonal bipyramidal
Explanation:
The correct answer to the question is: Linear
Q.
Which one of the following alcohol has greater boiling point___________________?
ethanol
glycerol
ethylene glaycol
methanol
Explanation:
The correct answer to the question is: glycerol
Q.
The preparation of benzene from acetylene can also be said as_________________?
Dehydration
Oxidation
Polymerization
Condensation
Explanation:
The correct answer to the question is: Polymerization
Q.
A elements are named as alkali metals because_______________?
Their oxides are basic
Their oxide and hydroxides are water soluble
They are found in earth
Both A & B
Explanation:
The correct answer to the question is: Both A & B
Q.
The reciprocal of the coefficent of viscosity is called__________?
Specific gravity
Fluidity
Density
Absorbance
Explanation:
The correct answer to the question is: Fluidity
Q.
Carbon in wrought iron is present as_________?
Iron carbide
Partly as iron carbide and partly as graphite
Graphite
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-F
R-Br
R-I
R-C
Explanation:
The correct answer to the question is: R-I
Q.
Identify among the following which has Lowest energy of electron in 1st shell.
H
Li+²
Be+³
He+¹
Explanation:
The correct answer to the question is: Be+³
Q.
The reaction of Lucas reagent is the fastest with_________?
CH3CH2OH
(CH3)2CHOH
CH3(CH2)OH
(CH3)3COH
Explanation:
The correct answer to the question is: (CH3)3COH
Q.
The process by which a substance absorbs moisture upon exposure to atmosphere is called?
Efflorescence
Deliquescence
Dehydrogenation
Desalination
Explanation:
The correct answer to the question is: Deliquescence
Q.
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
C5H10
C4H8
C3H6
C2H4
Explanation:
The correct answer to the question is: C4H8
Q.
Z number for chlorine is __________?
21
35.5
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_______________?
Tincal
Colemanite
Calcium carbonate
Boric acid
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_________________?
Pb2O
PbO2
All of the above
Pb3O4
Explanation:
The correct answer to the question is: Pb3O4
Q.
The phenomenon of negative catalysis is also known as:
Enzyme catalysis
Self catalysis
inhibition
auto catalysis
Explanation:
The correct answer to the question is: inhibition
Q.
Which of the following is not a use of formaldehyde ?
in making acetic acid
in making medicine urotropine
in 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?
3
2
6
4
Explanation:
The correct answer to the question is: 4
Q.
When the radiation of light is passed through a prism, it undergoes __________?
diffraction
refraction
reflection
interference
Explanation:
The correct answer to the question is: refraction
Q.
What is the mass percent of silver in silver notrate, AgNO3?
61.5%
63.5%
65.6%
64.5%
Explanation:
The correct answer to the question is: 63.5%
Q.
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
CH
SO
SO
CH
Explanation:
The correct answer to the question is: SO
Q.
Nucleus of an atom was discovered by___________?
James Chadwick
J J Thomson
Rutherford
Goldstein
Explanation:
The correct answer to the question is: Rutherford
Q.
Urea as a fertilizer contains:____________?
73% N
46% N
57% N
53% N
Explanation:
The correct answer to the question is: 46% N
Q.
Introduction of nitro group in a molecule is called___________________?
nitration
sulphonation
halogenation
amination
Explanation:
The correct answer to the question is: nitration
Q.
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
Gas chromatography
Column chromatography
Extraction
Distillation
Explanation:
The correct answer to the question is: Column chromatography
Q.
Which metal is used as a reducing agent in Smelting______?
Zn
Cu
C
Al
Explanation:
The correct answer to the question is: C
Q.
The molar mass of an organic acids is determined by____________?
Osmosis method
Volumetric method
Victor Meyer’s 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 & a bad leaving group
they have an electrophilic carbon
they have an electrophilic carbon & a good leaving group
Explanation:
The correct answer to the question is: they have an electrophilic carbon & a good leaving group
Q.
According to Journal of Biological Chemistry 158, human brain and heart are composed of ________water?
75%
89%
81%
73%
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.
27%
<2.6%
37%
26%
Explanation:
The correct answer to the question is: 37%
Q.
Tincal is a mineral of___________________?
C
Si
B
A1
Explanation:
The correct answer to the question is: B
Q.
Which ion will have maximum value of heat of hydration ?
A1+3
Ba+
Mg+2
Cs+
Explanation:
The correct answer to the question is: A1+3
Q.
Which is artificial manmade fiber?
Rayon
None of these
Saffron
Boron
Explanation:
The correct answer to the question is: Rayon
Q.
Acetylene gives:
Red precipitate with both the reagents
White precipitate with both the reagents
White precipitate with AgNO and red precipitate with CuCl
White precipitate with CuCl and red precipitate with AgNO
Explanation:
The correct answer to the question is: White precipitate with AgNO and red precipitate with CuCl
Q.
Alkanes are also known as________________?
saturated hydrocarbon
both A & C
paraffins
unsaturated hydrocarbon
Explanation:
The correct answer to the question is: paraffins
Q.
Which element is necessary for normal leaf development ?
Mg
Ca
Ba
Si
Explanation:
The correct answer to the question is: Ca
Q.
Isotopes differs in______________________?
properties depend upon mass
chemical properties
position in the periodic table
arrangement of electrons in orbitals
Explanation:
The correct answer to the question is: properties depend upon mass
Q.
Poisonous gas present in the exhaust fumes of a jet plane is__________?
Flurocarbon
Carbon monoxide
Methane
C2H2
Explanation:
The correct answer to the question is: Carbon monoxide
Q.
Example of ‘globular’ proteins is __________ ?
Primary protein
Peptide
Secondary proteins
Enzymes
Explanation:
The correct answer to the question is: Enzymes
Q.
The heat energy produced when the human body metabolises 1 gram of fat is__________?
1 KJ
30 KJ
29 KJ
39 KJ
Explanation:
The correct answer to the question is: 39 KJ
Q.
The chemical symbol for silver is __________?
Au
At
Ag
Sv
Explanation:
The correct answer to the question is: Ag
Q.
The process in which no heat enters or leave the system known as _____________?
Isobaric
Isothermal
adiabatic
Isochoric
Explanation:
The correct answer to the question is: adiabatic
Q.
Hookworm is a parasitic worm that infects ______?
liver
large intestine
small intestine
lungs
Explanation:
The correct answer to the question is: small intestine
Q.
In isothermal process?
Pressure of the system remains constant
Volume of the system remains unchanged
temperature of the system remains constant
No heat enter or leave the system
Explanation:
The correct answer to the question is: temperature of the system remains constant
Q.
Electric bulb filament is made of__________?
Tungsten
Copper
Aluminum
Lead
Explanation:
The correct answer to the question is: Tungsten
Q.
Argon gas was discovered by_______?
Rayleigh
Lockerey
Dalton
Ramsay
Explanation:
The correct answer to the question is: Ramsay
Q.
Which statement is incorrect ?
All the metals are good conductor of electricity
All the metals form acidic oxides
All the metals form positive ions
All the metals are good conductor of heat
Explanation:
The correct answer to the question is: All the metals form acidic oxides
Q.
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
methanol
carbonic acid
methanol
methane
Explanation:
The correct answer to the question is: methanol
Q.
Ozonolysis of acetylene gives:
Glyoxal then formic acid
Glycol
None
Formaldehyde
Explanation:
The correct answer to the question is: Glyoxal then formic acid
Q.
Ethylene diammine is ligand________?
Bi dentate
tri dentate
mono dentate
Poly dentate
Explanation:
The correct answer to the question is: Bi dentate
Q.
The PH of Tears is __________?
7.8
7.0
8.2
7.4
Explanation:
The correct answer to the question is: 7.4
Q.
The substance used in cancer therapy is___________?
Ni
Co
Fe
Rn
Explanation:
The correct answer to the question is: Co
Q.
Boric acid cannot be used__________________?
For enamel and glazes
As antiseptic in medicine
In soda bottles
For washing eyes
Explanation:
The correct answer to the question is: In soda bottles
Q.
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Glyoxime
Glycol
Benzaldehyde
Glyoxal
Explanation:
The correct answer to the question is: Glyoxal
Q.
Strong Nucleophile in polar aprotic solvent?
Bromide ion
Iodide ion
Chloride ion
Flouride ion
Explanation:
The correct answer to the question is: Flouride ion
Q.
The salt that gives the aqueous solution with pH less than 7, is called as____________?
Neutral salt
Basic salt
Amphoteric salt
Acidic salt
Explanation:
The correct answer to the question is: Acidic salt
Q.
Which one of the following is also known as tartaric acid ?
2 3-dihydroxy butance 1 4 -dioic acid
2 3 -dihydroxy butanedioic acid
2 2 -dihydroxy butanoic acid
2 3 -dihydroxy butanioc acid
Explanation:
The correct answer to the question is: 2 3-dihydroxy butance 1 4 -dioic acid
Q.
The law of traids is applicable to__________?
F, Cl, Br
Na, K, Rb
Cl, Br, I
Li, Be, B
Explanation:
The correct answer to the question is: Cl, Br, I
Q.
Actinides are the elements with atomic numbers from __________?
101 to 115
89 to 103
36 to 43
97 to 104
Explanation:
The correct answer to the question is: 89 to 103
Q.
Marsh gas is _________?
Hydrogen
Nitrogen
Methane
Ethane
Explanation:
The correct answer to the question is: Methane
Q.
Transition elements, in general, exhibit the following properties, except one. Name that property?
Tendency to form complexes
Variable oxidation state
Formation of alloys
Natural Radioactivity
Explanation:
The correct answer to the question is: Natural Radioactivity
Q.
Which one of the followings possesses melting point below 0°C?
Bismuth
Nitrogen
Phosphorus
Carbon
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.
Butanol
Ethylene glycol
Glycerol
Ethanol
Explanation:
The correct answer to the question is: Glycerol
Q.
The quantity of petrol can be increased by ___________?
Induction fueling
Cracking
Refining
Reforming
Explanation:
The correct answer to the question is: Cracking
Q.
The oxidation of isopropyl alcohol will yield___________________?
Propanone
propane
Propanoic acid
Propanol
Explanation:
The correct answer to the question is: Propanone
Q.
Which of the following is not an amino acids_____________________?
lactic acid
glycine
glumatic acid
aspartic acids
Explanation:
The correct answer to the question is: lactic acid
Q.
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
Cu2Cl2
CuCl2
PbCl2
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:
activated complex
Intermediate
inhibitor
Catalyst
Explanation:
The correct answer to the question is: Intermediate
Q.
The composition of ‘ Golden spangles is_________?
PbI2
PbCrO4
BaCrO4
As2Cr2O7
Explanation:
The correct answer to the question is: PbCrO4
Q.
Which one of the following radiation has the longer wavelength?
x-ray
infra red
visible
ultra violet
Explanation:
The correct answer to the question is: infra red
Q.
Barret esophagus is good example of__________?
Hypertrophy
Dysplasia
Metaplasia
Atrophy
Explanation:
The correct answer to the question is: Metaplasia
Q.
Which one is least ionic in nature and decompose on heating ?
NaOH
CsOH
LiOH
KOH
Explanation:
The correct answer to the question is: LiOH
Q.
The molecular formula of Glucose is____________?
CHO
NH
CHO
CH
Explanation:
The correct answer to the question is: CHO
Q.
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
Torsional strain
Angle strain
Steric strain
Orbital strain
Explanation:
The correct answer to the question is: Steric strain
Q.
diamond got brilliance due to following reason?
reflection
all of the above
refraction
dispersion
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?
Sublimation
Decantation
None
Evaporation
Explanation:
The correct answer to the question is: Sublimation
Q.
Surface water contains:_____________?
Organic matter
Salt & Organic matter
only salt
Suspended impurity
Explanation:
The correct answer to the question is: Salt & Organic matter
Q.
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
Filterate
Mother liquor
Extract
Molasses
Explanation:
The correct answer to the question is: Molasses
Q.
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
Cone. HCI and anhydrous SOCl2
Cone. HCI and anhydrous CaCl2
Cone. HCI and anhydrous ZnCl2
Cone. HCI and anhydrous PCl2
Explanation:
The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Q.
The by-product of the process of Saponification is___________?
Methanol
Glycol
Sodium hydroxide
Glycerol
Explanation:
The correct answer to the question is: Glycerol
Q.
What is the color of precipitates of AgI?
Yellow
Blue
Light Yellow
Brown
Explanation:
The correct answer to the question is: Yellow
Q.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
0.5 moles
0.4 moles
0.2 moles
0.3 moles
Explanation:
The correct answer to the question is: 0.2 moles
Q.
Aldehydes and ketones both, show the type of Isomerism is __________?
chain Isomerism
Functional Group Isomerism
Position Isomerism
Metamerism
Explanation:
The correct answer to the question is: Functional Group Isomerism
Q.
Cations possess __________ charge?
-ve
None
+ve
Neutral
Explanation:
The correct answer to the question is: +ve
Q.
By which method the molecular mass of benzene was determined as 78.108 ?
Vapour density method
X-ray diffraction method
Specific gravity method
Distillation methos
Explanation:
The correct answer to the question is: Vapour density method
Q.
CO2 is gas while SiO2 is solid at room temperature?
Silicon has all sigma bonds
carbon is non-metal while silicon is semi-metal
CO2 is an independent molecule while SiO2 has network covalent structure
CO2 forms multiple bond while silicon does not form multiple 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 corrodes the organic tissues
It is used in soda water
It reacts with chlorine gas
It reacts with fats to form soap
Explanation:
The correct answer to the question is: It corrodes the organic tissues
Q.
The rectified spirit contains________________?
100% alcohol
90% alcohol
12% alcohol
95% alcohol
Explanation:
The correct answer to the question is: 95% alcohol
Q.
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
Three
Two
Four
Six
Explanation:
The correct answer to the question is: Three
Q.
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
Radium dating
Uranium dating
Carbon dating
Deuterium dating
Explanation:
The correct answer to the question is: Carbon dating
Q.
Which of the following is the Radioactive isotope of Hydrogen?
Deuterium
Nichromium
Protium
Tritium
Explanation:
The correct answer to the question is: Tritium
Q.
The radiations with negative charge are________.
positron
Alpha radiations
Beta radiations
Gamma radiations
Explanation:
The correct answer to the question is: Beta radiations
Q.
Bleaching powder is an example of________________?
Double salt
Normal salt
Mixed salt
Complex
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______________?
260°C
620°C
630°C
360°C
Explanation:
The correct answer to the question is: 360°C
Q.
The IUPAC name of ethylene oxide is__________?
Epoxy methane
Oxoethene
Methoxymethane
Oxirane
Explanation:
The correct answer to the question is: Oxoethene
Q.
The concept of telluric helix was developed by___________?
Lother Meyer
Newland
A.E de Chancourtois
Dobereiner
Explanation:
The correct answer to the question is: A.E de Chancourtois
Q.
The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:
40g
45g
41.4g
43.6g
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
Organo-nickel
Raney 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 __________?
carbonic acid
lactic acid
citric acid
acetic acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Alpha particles can be detected by using___________?
Zinc sulphide screen
Barium sulphate
Thin Aluminium sheet
Gold foils
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___________?
Electron
None of These
Proton
Neutron
Explanation:
The correct answer to the question is: Electron
Q.
The reaction of C2H5OH with conc. H2SO4 does not give_________?
Ethyl hydrogen sulphate
Acetylene
Ethene
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 octadecanoate
Both A & B
Sodium hexadecanoate
Sodium pentadecanoate
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
3.2
2.198
Explanation:
The correct answer to the question is: 3.2
Q.
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
4e
3e
2e
e
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
Three
Four
Five
Explanation:
The correct answer to the question is: Three
Q.
The distribution coefficient is related to:______________?
decreasing factors
retardation factors
Separating factors
Colouring factors
Explanation:
The correct answer to the question is: Separating factors
Q.
In Aldehydes and Ketones, carbon of carbonyl group is ____________?
sp hybridised
Unhybridised
sp hybridised
sp hybridised
Explanation:
The correct answer to the question is: sp hybridised
Q.
Formula of Chile saltpetre is__________________?
NaNO3
CaCO3
Ba (NO3)2
NH4Cl
Explanation:
The correct answer to the question is: NaNO3
Q.
Which of the following is the most reactive_________________?
ethene
ethyne
benzene
ethane
Explanation:
The correct answer to the question is: ethene
Q.
Where does the oxygen that keeps us alive come from?
Carbonates absorbed from soil
Carbon dioxide
Water
Oxides of minerals
Explanation:
The correct answer to the question is: Water
Q.
Which is the paramagnetic oxide of chlorine ?
ClO2
Cl2O6
Cl2O7
all
Explanation:
The correct answer to the question is: ClO2
Q.
Grignard reagent is reactive due to___________________?
the presence of halogen atom
all
the presence of magnesium atom
the polarity of C-Mg bond
Explanation:
The correct answer to the question is: the polarity of C-Mg bond
Q.
Real gases show ideal behavior at_______?
Low Temp & Low Pressure
Low Temp & High Pressure
High Temp & Low Pressure
High Temp & High pressure
Explanation:
The correct answer to the question is: High Temp & Low Pressure
Q.
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
7.5gm
0.065gm
0.65gm
6.5gm
Explanation:
The correct answer to the question is: 7.5gm
Q.
Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
aldomint
formalactose
formamint
lactomint
Explanation:
The correct answer to the question is: formamint
Q.
Solvent used in separation of biomolecules is _______________?
Alcohol
Ether
Acetone
Trichloroacetic acid
Explanation:
The correct answer to the question is: Trichloroacetic acid
Q.
The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
CO³+H²O
CO²+O²
CO+H²(water gas)
Laughing Gas
Explanation:
The correct answer to the question is: CO+H²(water gas)
Q.
Lactic acid on oxidation by alkaline potassium permanganate gives:____________?
Pyruvic acid
Propionic acid
Cinnamic acid
Tartaric acid
Explanation:
The correct answer to the question is: Pyruvic acid
Q.
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
Toluene
All
n-propyl benzene
Ethyl benzene
Explanation:
The correct answer to the question is: All
Q.
Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?
AgNO3
K2MnO4
CuSO4
CH3COOH
Explanation:
The correct answer to the question is: AgNO3
Q.
The rate of formation of ozone depends on the flux of:
visible radiation
Gamma rays
Ultra violet radiation
Infrared radiation
Explanation:
The correct answer to the question is: Ultra violet radiation
Q.
In water, Hydrogen is present ________by mass.
15.15%
22%
11.11%
31.13%
Explanation:
The correct answer to the question is: 11.11%
Q.
Polyvinyl acetate is the Polymer of __________?
Vinyl Chloride
Methyl methacrylate
Formaldehyde
Vinyl acetate
Explanation:
The correct answer to the question is: Vinyl acetate
Q.
Formaldehyde on condensation in the presence of calcium hydroxide: ______________?
Maltose
Formose
Xylose
Fructose
Explanation:
The correct answer to the question is: Formose
Q.
Amino acids are a product of the digestion of: ___________?
Fats
Carbohydrates
Vitamins
Proteins
Explanation:
The correct answer to the question is: Proteins
Q.
O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
HCHO
Ethyl alcohol
Ethylene 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__________________?
three
one
four
two
Explanation:
The correct answer to the question is: one
Q.
Which instrument is used to measure the viscosity.?
Viscometer
Hygrometer
Anemometer
Hydrometer
Explanation:
The correct answer to the question is: Viscometer
Q.
For which mechanisms the first step involved is the same ?
E1 and SN1
E1 + E2
SN1 and SN2
E2 + SN2
Explanation:
The correct answer to the question is: E1 and SN1
Q.
In whole Periodic Table which element Is Most Reducing Agent ?
Helium
Chlorine
Neon
lithium
Explanation:
The correct answer to the question is: lithium
Q.
An alcohol which can be prepared by fermentation is_________________?
CH3OH
CH3 – CH2 – OH
C3H7OH
C6H5OH
Explanation:
The correct answer to the question is: CH3 – CH2 – OH
Q.
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
yellow
pink
black
brick red
Explanation:
The correct answer to the question is: brick red
Q.
Which of the following statements is false about transition metals?
They show variable valency
They form coloured ions
They form complexes
All transition metal compounds are paramagnetic
Explanation:
The correct answer to the question is: All transition metal compounds are paramagnetic
Q.
Which one of following amino acid is neither acidic nor a basic in nature ?
Proline
Lysine
Glutamic acid
Histidine
Explanation:
The correct answer to the question is: Proline
Q.
Which of the following will have the highest boiling point ?
propanal
methanol
ethanal
hexanone
Explanation:
The correct answer to the question is: hexanone
Q.
The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
2.05 gram
4.05 gram
3.05 gram
5.05 gram
Explanation:
The correct answer to the question is: 3.05 gram
Q.
Which one of the following is most acidic?
Phenol
M-nitrophenol
P-nitrophenol
O-nitrophenol
Explanation:
The correct answer to the question is: P-nitrophenol
Q.
The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
1-4Kg
1-3Kg
1-2Kg
1-5Kg
Explanation:
The correct answer to the question is: 1-2Kg
Q.
The average salinity of sea water is________?
3%
2.5%
3.5%
2%
Explanation:
The correct answer to the question is: 3.5%
Q.
Which element can form tripositive ion ?
Silicon
Beryllium
Carbon
Aluminium
Explanation:
The correct answer to the question is: Aluminium
Q.
The element used for the formation of alloys is__________?
Calcium
Chromium
Mercury
Iron
Explanation:
The correct answer to the question is: Chromium
Q.
Which one of the following halogens is present in Teflon________________?
F2
Br2
I2
Cl2
Explanation:
The correct answer to the question is: F2
Q.
Dimethyl ketones are usually characterized through_____________?
Tollen’s reagent
Iodoform test
Benedict’s reagent
Schiff’s test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Which molecule have stronger London dispersion forces?
Hydrogen gas
Hydrochloric acid
Bromine
Water
Explanation:
The correct answer to the question is: Water
Q.
The IUPAC name of pyridines is__________?
Azolidins
Azolo
Azine
Diazine
Explanation:
The correct answer to the question is: Azine
Q.
The organic compound used as antiknock agent in petroleum is____________?
CH )Hg
(CH )Pb
CH MgBr
TNT
Explanation:
The correct answer to the question is: (CH )Pb
Q.
Identify among the following which is not the unsaturated hydrocarbon.
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Which one of the following is the correct sequence according to atomic weights?
Ni> Co> Fe
Fe>Co> Ni
Co >Fe>Ni
Co > Ni > Fe
Explanation:
The correct answer to the question is: Co > Ni > Fe
Q.
The Chemical Formula of Sand is___________?
Si2O3
SiO2
Al2O3
Sr2O
Explanation:
The correct answer to the question is: SiO2
Q.
Generally the limit of visible spectrum is__________?
1000 to 300 A°
8000 to 10,000 A°
3800 to 7600 A°
12,000 to 15,000 A°
Explanation:
The correct answer to the question is: 3800 to 7600 A°
Q.
Which gas is used for artificial ripening of green fruit ?
Acetylene
Carbon dioxide
Ethane
Ethylene
Explanation:
The correct answer to the question is: Ethylene
Q.
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
urotropine
Bakelite
Nylon 66
Aniline formaldehyde plastic
Explanation:
The correct answer to the question is: Bakelite
Q.
Which of the following can be separated by ” Sublimation Method”?
Sand and Naphthalene
Both A & B
None
Sand and Iron Filing
Explanation:
The correct answer to the question is: Sand and Naphthalene
Q.
The rate of E1 reaction depends upon______________________?
the concentration of substrate
base the concentration of substrate as well as nucleophile
the concentration of nucleophile
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.
CS
CH
CO
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
N2
None of These
Explanation:
The correct answer to the question is: He
Q.
Acetophenone is a_____________________?
Ketone
Aldehyde
Ester
Ether
Explanation:
The correct answer to the question is: Ketone
Q.
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p6 4s23d5
1s2 2s2 2p6 3s2 3p5 3d10
1s2 2s2 2p6 3s2 3p6 3d7
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p6 4s23d5
Q.
All members of homologous series have different __________?
chemical properties
functional group
physical properties
all of them
Explanation:
The correct answer to the question is: physical properties
Q.
Heating phenol with Zn will yield_________________?
Benzoic acid
Cyclohexane
Benzene
Phenoxide
Explanation:
The correct answer to the question is: Benzene
Q.
Numbers of subatomic particles?
3
2
more than 3
1
Explanation:
The correct answer to the question is: more than 3
Q.
The most commonly used bleaching agent is_________?
sodium chlorine
chlorine
carbon dioxide
alcohol
Explanation:
The correct answer to the question is: chlorine
Q.
The easy way of balancing the chemical equation is_________?
According to atom’s atomic mass.
None of the above
according to atom’s atomic number.
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 ____________?
Reasonable
Electromeric effect
no bond reasonable
Inductive effect
Explanation:
The correct answer to the question is: no bond reasonable
Q.
The one mole of _____molecule has the highest number of atoms?
HCO
O
HClO
HSO
Explanation:
The correct answer to the question is: HCO
Q.
On oxidation, an alcohol gives an aldehyde having same number of carbon atoms as in alcohol, the alcohol is____
Secondary Alcohol
None of These
Primary Alcohol
Tertiary alcohol
Explanation:
The correct answer to the question is: Primary Alcohol
Q.
Incomplete oxidation of methane in the limited supply of air forms ?
CO + 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 ___________?
Bromine
Iodine
Phosphorus
Mercury
Explanation:
The correct answer to the question is: Bromine
Q.
A brivalent metal has the equivalent weighr of 12. The molecular weight to its oxide will be_______?
40
32
36
24
Explanation:
The correct answer to the question is: 40
Q.
An acid with unpleasant smell_________________?
formic acid
propionic acid
acetic acid
butyric acid
Explanation:
The correct answer to the question is: butyric acid
Q.
The system which can exchange matter as well as energy with its surroundings is called____________?
open system
Isolated system
Closed system
Inert system
Explanation:
The correct answer to the question is: open system
Q.
Formalin is ___________ solution of formaldehyde in water?
40%
10%
60%
20%
Explanation:
The correct answer to the question is: 40%
Q.
The element cesium bears resemblance with________________?
None of the above
Cr
Both of the above
Ca
Explanation:
The correct answer to the question is: None of the above
Q.
Li is different from its family members due to____________________?
less electropositivity
high charge density
small size
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
Carbonates of lithium are not stable like that of sodium due to________________?
Not known yet
Low electropositivity
Low charge density
Low electronegativity
Explanation:
The correct answer to the question is: Low electropositivity
Q.
Alkyl halides undergo a type of reaction_________________?
Nucleophilic addition
both A & C
Elimination
Nucleophilic substitution
Explanation:
The correct answer to the question is: both A & C
Q.
If temperature of gallium arsenide is increased then its conductivity will___________________?
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
Cl2>F2>Br2>I2
F2>Cl2>I2>Br2
F2>Cl2>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
Soluble in water on heating
Insoluble in all solvents
Insoluble in water
Explanation:
The correct answer to the question is: More Soluble in water
Q.
General formula of alkyne is______________?
CnH2n + 2
CnH2n
CnH2n – 2
CnH2n + 2
Explanation:
The correct answer to the question is: CnH2n – 2
Q.
Which of the following is non spontaneous cell?
Galvanic cell
Not
Electrolytic cell
Daniel cell
Explanation:
The correct answer to the question is: Electrolytic cell
Q.
The bond angle between hybrid orbitals in methane CH3 is___________?
115.5°
109.5°
180°
105. 7°
Explanation:
The correct answer to the question is: 109.5°
Q.
Phosphorus is a Greek word and it means_________________?
Light bearing
Tetrahedral
Impure
Fire
Explanation:
The correct answer to the question is: Light bearing
Q.
Alkaline PH scale starts from?
6 to 10
8 to 14
7 to 11
0 to 14
Explanation:
The correct answer to the question is: 8 to 14
Q.
The word Alkali means__________________?
Base
Basic salt
Spirit
Ashes
Explanation:
The correct answer to the question is: Ashes
Q.
At what digit of PH scale PH is neutral?
3
5
7
10
Explanation:
The correct answer to the question is: 7
Q.
Silver nitrate is also known as____________?
Lunar Caustic
Blue Stone
Both A & B
Blue Vitriol
Explanation:
The correct answer to the question is: Lunar Caustic
Q.
Optic fibres are used in :
Ultrasound scans
CAT scans
X-ray photos
Endoscopy
Explanation:
The correct answer to the question is: Endoscopy
Q.
Which of the following is not a use of acetaldehyde ?
formation of throat lozenges
formation of phenolic resins
formation of mirror
antiseptic inhalant
Explanation:
The correct answer to the question is: formation of throat lozenges
Q.
Which of the halogen has highest electronegativity ?
Chlorine
Iodine
Fluorine
Bromine
Explanation:
The correct answer to the question is: Fluorine
Q.
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphorus pentoxide
Phosphine
Water
Phosphorus
Explanation:
The correct answer to the question is: Phosphine
Q.
Which of the following is a soft Coal?
Bituminous
Peat
Anthracite
Lignite
Explanation:
The correct answer to the question is: Bituminous
Q.
The properties which do not depend on mass of the substance are _____________?
Colligative properties
None of These
intensive properties
Extensive properties
Explanation:
The correct answer to the question is: intensive properties
Q.
In base catalyzed reaction of carbonyl compound the catalyst___________________?
acidic character of reagent
both a and b
increases the nucleophilic character of reagent
increases electrophilic character of carbonyl compound
Explanation:
The correct answer to the question is: increases the nucleophilic character of reagent
Q.
Which one of the following is caustic potash?
NaOH
NaCl
NaBH4
KOH
Explanation:
The correct answer to the question is: KOH
Q.
Soil pollution is caused by:_________?
PAN
Acid rain
Ozone
Aerosol
Explanation:
The correct answer to the question is: Acid rain
Q.
Why do we determined the boiling point of a liquid?
To check its Purity and nature
To Check temperature
None of These
To check its Acidity and Basicity
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 ___________________?
Hydrogen
Oxygen
OH
Sulphur
Explanation:
The correct answer to the question is: Sulphur
Q.
The halogen which reacts very slowly with halogen is________________?
Bromine
Iodine
Fluorine
Chlorine
Explanation:
The correct answer to the question is: Iodine
Q.
The O-O linkage is present in__________?
H2S4O6
H2 S2 O6
H2SO8
H2S2O3
Explanation:
The correct answer to the question is: H2SO8
Q.
Why does Ethyl Alcohol show high boiling point then Acetone?
Due to its Low molecular weight
Due to high molecular weight
Due to its Acidic nature
Due to Hydrogen bonding
Explanation:
The correct answer to the question is: Due to Hydrogen bonding
Q.
Colour in transition metal compounds is attributed to____________?
Complete ns sub-shell
Small sized metal ions
Absorption of light in UV region
Incomplete (n-1) d sub-shell
Explanation:
The correct answer to the question is: Incomplete (n-1) d sub-shell
Q.
In homologous series there is the difference of mass between adjacent members.
Q.
Parke’s process is used in the extraction of________?
Silver
Sodium
Iron
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?
decrease by four times
increases by four times
decreases by two 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?
all of above
hygroscopic
metals
polymeric
Explanation:
The correct answer to the question is: polymeric
Q.
The usual property of ionic crystal are:_____________?
Unstable
gaseous form
Compound forming
Stable
Explanation:
The correct answer to the question is: Compound forming
Q.
The phosphate present in sewage water which cause eutrophication Can be removed by adding:
Chlorine
permangnate
Alum
Lime
Explanation:
The correct answer to the question is: Lime
Q.
The resonance energy of benzene is__________________?
150.5 Cal/mol
250.5 Cal/mol
250.5 kJ/mol
150.5 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
None of the above
thermal capacity
specific heat
Explanation:
The correct answer to the question is: thermal capacity
Q.
In unsaturated hydrocarbons electrons favour___________________?
none
addition reactions
less reactivity
substitution reactions
Explanation:
The correct answer to the question is: addition reactions
Q.
The formula of starch is__________________?
C6H12O6
C6H10O5
(C6H10O5)n
C12H22O11
Explanation:
The correct answer to the question is: (C6H10O5)n
Q.
Who is often referred to as the “father of Chemistry”?
Albert Einstein
Antoine Lavoisier
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
NaHCO3
NaNO3
Na2CrO4
Explanation:
The correct answer to the question is: Na2CO3
Q.
Column of manometer which faces liquid is __________ ?
Depressed
Remains same
Compressed
Raised
Explanation:
The correct answer to the question is: Depressed
Q.
4moles of Carbon dioxide(CO2) have _____molecules.
18.06 x 10
12.04 x 10
24.08 x 10
6.02 x 10
Explanation:
The correct answer to the question is: 24.08 x 10
Q.
According to Kinetic Molecular Theory gas molecules move in_______path?
Parabolic
Zig-zag
Straight
Hyperbolic
Explanation:
The correct answer to the question is: Straight
Q.
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
(CH3)3 C-CH2 – X
CH3-X
(CH3)3 C – X
(CH3)2 CH – X
Explanation:
The correct answer to the question is: (CH3)2 CH – X
Q.
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
75.2pm
75.3pm
75.4pm
75.5pm
Explanation:
The correct answer to the question is: 75.4pm
Q.
O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
HCHO
Ethylene oxide
Ethylene glycol
Ethyl alcohol
Explanation:
The correct answer to the question is: HCHO
Q.
The bond energy of Hydrogen molecule is__________?
110Kcal/mol
104Kcal/mol
150KJcal/mol
106Kcal/mol
Explanation:
The correct answer to the question is: 104Kcal/mol
Q.
The following alcohol does not undergo oxidation is _____________?
1° alcohol
0° alcohol
2° alcohol
3° alcohol
Explanation:
The correct answer to the question is: 3° alcohol
Q.
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
The presence of excessive Oxygen
The presence of Oxygen
The absence of Oxygen
The presence of Hydrogen
Explanation:
The correct answer to the question is: The absence of Oxygen
Q.
SN2 reaction can be best carried out with__________________?
primary alkyl halide
tertiary alkyl halide
secondary alkyl halide
all
Explanation:
The correct answer to the question is: primary alkyl halide
Q.
Magnesium metal does not burn in the vessel containing_______________?
N2
N2 and O2
Ne
O2
Explanation:
The correct answer to the question is: Ne
Q.
Which is fused cyclic aromatic compound _____________________?
diphenyl amine
biphenyl
diphenyl methane
naphthalene
Explanation:
The correct answer to the question is: naphthalene
Q.
Potassium Permanganate is used for purifying drinking water, because_________?
It is a sterilising agent.
It dissolves the impurities of water.
It is a reducing agent.
It is an oxidising agent.
Explanation:
The correct answer to the question is: It is an oxidising agent.
Q.
Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
Alkali metals
Ketones
Aldehydes
Halides
Explanation:
The correct answer to the question is: Halides
Q.
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
primary alcohol
secondary alcohol
tertiary alcohol
dihydric 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
froth floatation
roasting
smelting
Explanation:
The correct answer to the question is: smelting
Q.
The gas which cannot be dried by conc. H2SO4 ?
CO2
SO2
C2H4
H2S
Explanation:
The correct answer to the question is: H2S
Q.
Ce58 is a member of__________?
P-block
f-block
d-block
S-block
Explanation:
The correct answer to the question is: f-block
Q.
Fluorine can react with_________________?
Rn
Xe
Kr
All of the above
Explanation:
The correct answer to the question is: All of the above
Q.
FeSO4 forms brown ring with________________?
NO
NO2
N2O3
N2O
Explanation:
The correct answer to the question is: NO
Q.
The Branch of chemistry dealing with brewing and distilling is called _______ ?
Zygology
Zymurgy
Zymology
Zootaxy
Explanation:
The correct answer to the question is: Zymurgy
Q.
In diaphragm cell hydrogen is discharged by the reduction of__________________?
Water
NaCl
Na+
HCI
Explanation:
The correct answer to the question is: Water
Q.
The rays that have negative charge are ___________?
Cathode Rays
Canal Rays
Gamma Rays
Anode Rays
Explanation:
The correct answer to the question is: Cathode Rays
Q.
What is the formula of Silver nitrate?
AgNO
AgNO4
AgNO2
AgNO3
Explanation:
The correct answer to the question is: AgNO3
Q.
Coal gas is made up of mostly ________ & _________?
Hydrogen & Water
Hydrogen & Carbon dioxide
Carbonmonoxdide & water
Hydrogen & Methane
Explanation:
The correct answer to the question is: Hydrogen & Methane
Q.
Removal of CO2 is called_____________________?
carboxylation
decarboxylation
hydroxylation
esterification
Explanation:
The correct answer to the question is: decarboxylation
Q.
The oxidation state of cu which are expected to be diamagnetic
Cu+1
Cu+2
Cu+3
Cu+4
Explanation:
The correct answer to the question is: Cu+1
Q.
The marsh gas is ___________?
Propane
Methane
Ethane
Butane
Explanation:
The correct answer to the question is: Methane
Q.
The maximum oxidation shown by manages is_________?
+7
+2
+4
+5
Explanation:
The correct answer to the question is: +7
Q.
The oxides of beryllium BeO is_______________?
Amphoteric
Acidic
Neutral
Basic
Explanation:
The correct answer to the question is: Amphoteric
Q.
When one hydrogen atom of alkane is removed then it is called________________?
saturated hydrocarbon
alkyl
aldehyde
alkene
Explanation:
The correct answer to the question is: alkyl
Q.
Which of the following is a neutral particle ?
Neutron
Proton
Electron
Alpha particle
Explanation:
The correct answer to the question is: Neutron
Q.
Boron in soil has been considered micronutrient for_________________?
Proper growth of plants
Soil porocity
All
Alkalinity of soil
Explanation:
The correct answer to the question is: Proper growth of plants
Q.
What is the Chemical formula of Zinc Hydroxide _________ ?
ZNO2
ZnOH
Zn2(OH)3
Zn(OH)2
Explanation:
The correct answer to the question is: Zn(OH)2
Q.
The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
Cl2
F2
I2
Br2
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____________________?
NO2
HNO2
N2O
HNO3
Explanation:
The correct answer to the question is: HNO3
Q.
In Bosch Process, that is used to separate the Hydrogen gas from water Gas, the catalyst is used ______?
Pt
Both B&C
Cr²O³
FeO
Explanation:
The correct answer to the question is: Both B&C
Q.
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
Cl2O6
Cl2O7
Cl2O
ClO2
Explanation:
The correct answer to the question is: ClO2
Q.
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
it has a high latent heat of fusion
it has a low specific heat capacity
it becomes very hard
it reflects most of the heat from the sun
Explanation:
The correct answer to the question is: it has a high latent heat of fusion
Q.
The source of the Sun’s energy is the process of ____________?
Photoelectric emission
Thermionic emission
Nuclear fission
Nuclear fusion
Explanation:
The correct answer to the question is: Nuclear fusion
Q.
The metal which is used in thermite process because of its activity is____________________?
copper
iron
zinc
aluminium
Explanation:
The correct answer to the question is: aluminium
Q.
LiAlH4 converts Acetaldehyde into ___________?
Methane
Methyl alcohol
Acetic acid
Ethyl alcohol
Explanation:
The correct answer to the question is: Ethyl alcohol
Q.
The solution remaining after the formation of crystals is called ___________________?
Mother liquor
Dilute solution
Residue
both A & B
Explanation:
The correct answer to the question is: Mother liquor
Q.
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
an oxidizing agent
a dehydrating agent
as sulphonating agent
an acid
Explanation:
The correct answer to the question is: a dehydrating agent
Q.
Which one is a pure carbon?
Coke
Coal Tar
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___________?
Raoult’s law
Dalton’s law
Gay Lussac’s law
Henry’s law
Explanation:
The correct answer to the question is: Henry’s law
Q.
When phenol is heated with concentrated nitric acid the product is________________?
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_______?
11-α-D-glucopyranosyl-2-β-D-fructofuranoside
1-α-D- glucofuranosyl-2-α-D- fructopyranoside
1-β- D- glucofuranosyl-2-α- D- fructofuranoside
1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Explanation:
The correct answer to the question is: 1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Q.
Iodoform test can be used to distinguish between_________________?
all of the above
acetaldehyde and methanal
ethanol and methanol
acetone and diethyl ketone
Explanation:
The correct answer to the question is: all of the above
Q.
What are the metal bearing rocks called?
Bitumen
Bauxite
Ores
Metalloids
Explanation:
The correct answer to the question is: Ores
Q.
Find the PH of a 0.001 M solution of Nitric acid HNO3?
4
2
5
3
Explanation:
The correct answer to the question is: 3
Q.
Which one does not give borax bead test_________________?
Nickel sulphate
Cobalt sulphate
Copper sulphate
Barium sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
Removal of halogen and hydrogen atom is_________________?
hydrohalogenation
halogenation
dehalogenation
dehydrohalogenation
Explanation:
The correct answer to the question is: dehydrohalogenation
Q.
Cathode is a metalic plate where__________ takes place.
Redox
Substitution
Reduction
Oxidation
Explanation:
The correct answer to the question is: Reduction
Q.
In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
None of them
H²O
Flouride
Sodium
Explanation:
The correct answer to the question is: H²O
Q.
Borax is a white crystalline solid and it is_________________?
More soluble in hot water
More soluble in cold water
Soluble only in organic solvents
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 ?
red
black
Violet
White
Explanation:
The correct answer to the question is: black
Q.
Preparation of vegetable ghee involves_________________?
hydration
halogenation
hydrogenation
hydroxylation
Explanation:
The correct answer to the question is: hydrogenation
Q.
which Compound Destroy The OZONE ?
CH3COOH
CFCs
BOTH A & B
None Of These
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
Tollen’s test
Lucas test
Benedict’s test
Explanation:
The correct answer to the question is: Lucas test
Q.
Which of the following is the use of Silver nitrate?
used in making green pigments
used as mordant in dyeing
All of these
used in photography and medicines
Explanation:
The correct answer to the question is: used in photography and medicines
Q.
Which one of the following pairs shown diagonal relationship in the periodic table ?
Lithium and beryllium
Sodium and Lithium
Lithium and magnesium
Boron and Beryllium
Explanation:
The correct answer to the question is: Lithium and magnesium
Q.
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
Electrophilic addition
Electrophilic substitution
Necleophilic substitution
Nucleophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Cannizaros reaction takes place through the transfer of ____________________ from complex anion?
oxide ion
hydrogen ion
hydride ion
methoxide ion
Explanation:
The correct answer to the question is: hydride ion
Q.
Photographic plates are coated with a thin film of _________________?
AgNO3
AgCl
AgI
AgBr
Explanation:
The correct answer to the question is: AgBr
Q.
One Water molecule can form maximum ______hydrogen bonds.
2
4
3
None
Explanation:
The correct answer to the question is: 4
Q.
Boyle’s Law was given by the Robert Boyle in_______?
1660
1662
1661
1663
Explanation:
The correct answer to the question is: 1662
Q.
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Diastase-maltase-zymase
Maltase-diastase-zymase
Zymase-maltase-diastase
Diastase-zymase-maltase
Explanation:
The correct answer to the question is: Diastase-maltase-zymase
Q.
The chemical composition of cinnabar is__________________?
PbS
ZnS
HgS
FeS
Explanation:
The correct answer to the question is: HgS
Q.
Identify the unsaturated compound that does not give red ppts when treated with____________Ammonical cuprous chloride
CH=CH
CH-CCH(1-Propyne)
CH-CH-CCH (1-Butyne)
CH-CH-CHCCH(1-Pentyne)
Explanation:
The correct answer to the question is: CH=CH
Q.
Raney nickel is prepared from ______________________ by treating with caustic soda?
Ni-Cu alloy
Ni-Fe alloy
Ni-Mg alloy
Ni-Al alloy
Explanation:
The correct answer to the question is: Ni-Al alloy
Q.
The practical problem in Hydrogen production is it:______________?
Chemical property
Size
Valency
Weight
Explanation:
The correct answer to the question is: Weight
Q.
Which of the following shows electrical conduction_____?
Graphite
Diamond
Sodium
Potassium
Explanation:
The correct answer to the question is: Graphite
Q.
Chlorination of toluene in the presence of sublight produces_________________?
Benzyl chloride
o – chlorotoluene
p – chlorotoluene
benzoic acid
Explanation:
The correct answer to the question is: Benzyl chloride
Q.
Octane number is 0 value for ___________?
iso-heptane
n-hexane
n-heptane
iso-octane
Explanation:
The correct answer to the question is: n-heptane
Q.
Which one of the following substances conducts electricity by the movement of ions ?
Graphite
Molten sodium chloride
Mercury
Copper
Explanation:
The correct answer to the question is: Molten sodium chloride
Q.
The fundamental way to transfer energy are:_____________?
pressure and volume
heat and work
heat and volume
pressure and temperature
Explanation:
The correct answer to the question is: heat and work
Q.
The main buffer system of the human blood is____________?
HCO – HCO
CHCOOH – CHCOO
NHCONH – NHCONH
HCO – CO
Explanation:
The correct answer to the question is: HCO – HCO
Q.
The acetylene molecule contains:___________?
2 sigma and 3 pi bonds
5 sigma bonds
3 sigma and 2 pi bonds
4 sigma and 1 pi bonds
Explanation:
The correct answer to the question is: 3 sigma and 2 pi bonds
Q.
Black foot disease is caused by the pollution of groundwater as a consequence of increased seepage of:__________?
Mercury
Nitrates
Fluorides
Arsenic
Explanation:
The correct answer to the question is: Arsenic
Q.
Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Sabatier Senderns reaction involve _____________ in presence of Ni?
alkyne & Cl2
alkene & O2
alkene & N2
Aalkene & H2
Explanation:
The correct answer to the question is: Aalkene & H2
Q.
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
2
4
6
1
Explanation:
The correct answer to the question is: 4
Q.
Surface Tension ________with increasing the surface area of liquid?
Decreases
Increases
None
Remains Same
Explanation:
The correct answer to the question is: Decreases
Q.
Which of the following reagents will react with both aldehydes and ketones ?
Grignard reagent
Tollens reagent
Benedicts 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 acid, in ancient times, was used to eliminate ant-hills
this corrosive acid is secreted by ants to drive away their enemies
ants are attracted by the odour of this acid
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 KOH
Na2O and KOH
CaO and NaOH
NaOH and Na2O
Explanation:
The correct answer to the question is: CaO and NaOH
Q.
Ethanol can be converted into ethanoic acid by_________________?
Oxidation
Fermentation
Hydration
Hydrogenation
Explanation:
The correct answer to the question is: Oxidation
Q.
The most useful dye for those fabric which can form hydrogen bonds is:_____________?
Vat dye
Direct dye
Acid dye
Mordent dye
Explanation:
The correct answer to the question is: Direct dye
Q.
Sodium is not observed in +2 oxidation state because of its__________________?
high second ioniation potential
high ionic radius
high first ionization 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
HCI
HF
HI
Explanation:
The correct answer to the question is: HF
Q.
Which of the following sulphates is not soluble in water ?
Zinc sulphate
Barium sulphate
Sodium sulphate
Potassium sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
77% Fe
75% Fe
78% Fe
74% Fe
Explanation:
The correct answer to the question is: 78% Fe
Q.
The earth absorb radiation in Visible range but emit radiation at the same rate in the:
Ultra voilet
All of these
Infrared
Gamma rays
Explanation:
The correct answer to the question is: Infrared
Q.
Product of Nucleophilic Substitution Uni Molecular reaction is in case of chiral substrate?
Retention
Inversion
Stereospecific
Recemic Mixture
Explanation:
The correct answer to the question is: Recemic Mixture
Q.
The Electronegativity of Hydrogen is _____.
2.8
1.8
2.2
3.1
Explanation:
The correct answer to the question is: 2.2
Q.
The valency of carbon Atom is __________ ?
2
1
3
4
Explanation:
The correct answer to the question is: 4
Q.
Elements which emit natural radioactivity are known as __________ ?
Radio elements
Active elements
Radioactive elements
Nuclear elements
Explanation:
The correct answer to the question is: Radioactive elements
Q.
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
0.215
0.015
0.900
0.115
Explanation:
The correct answer to the question is: 0.115
Q.
The typical reactions of aldehyde is _____________?
Nucleophilic substitution
Nucleophilic addition
Nucleophilic elimination
Electrophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Which among the following is not a property of Ionic bond _________?
Sharing of electrons
Transfer of electrons
Losing of electrons
Gain of electrons
Explanation:
The correct answer to the question is: Sharing of electrons
Q.
One fathom is equal to:__________?
6 feet
60 feet
6 meters
100 cm
Explanation:
The correct answer to the question is: 6 feet
Q.
Silicon differ from silica by a group of__________________?
O2
OH
Ch3
OCH3
Explanation:
The correct answer to the question is: Ch3
Q.
A metallic atom loses its valence electron to form a/an _________?
an anion
an anion – cation
a cation
none of these
Explanation:
The correct answer to the question is: a cation
Q.
Which compound shows hydrogen bonding ?
C2H5OH
CH3OCH3
C2H6
C2H5Cl
Explanation:
The correct answer to the question is: C2H5OH
Q.
Which of the following alloys contain(s) Cu and Zn?
Brass
Bronze
Type metal
Gun-metal
Explanation:
The correct answer to the question is: Brass
Q.
Noble gases are so called zero group because they have:_________?
Both A and B
Zero Electronegativity
Zero Electron Affinity
Zero Valency
Explanation:
The correct answer to the question is: Both A and B
Q.
Magnetic quantum number specifies___________?
Size of orbitals
All of the above
Shape of orbitals
Orientation 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___________________?
Valeric acid
Tartaric 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?
16
4
7
2
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 ZnCl
Conc. HNO & Anhydrous MgCl
Dil. HCl & hydrated ZnCl
Conc. HCl & 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?
7
8
5
6
Explanation:
The correct answer to the question is: 5
Q.
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
P-Block
f-Block
d-Block
S-Block
Explanation:
The correct answer to the question is: f-Block
Q.
Which compound will readily undergo sulphonation ?
Nitro benzene
Toluene
Benzene
Chlorobenzene
Explanation:
The correct answer to the question is: Toluene
Q.
If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?
CH2O
CHO2
CH2
C2H2O4
Explanation:
The correct answer to the question is: CHO2
Q.
The Ionization energy of Hydrogen is __________?
13.6ev
12.54ev
10.54ev
17.56ev
Explanation:
The correct answer to the question is: 13.6ev
Q.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
formaldehyde
acetone
benzaldehyde
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
Gamma particle
Beta particle
Alpha particle
Explanation:
The correct answer to the question is: Alpha particle
Q.
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
Iodine
Bromine
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Iodine
Q.
The molecules of which gas have highest speed?
N at 1,027C
CH at 300 K
O at 0C
H at -73C
Explanation:
The correct answer to the question is: H at -73C
Q.
Boron is non metal while other elements of IIIA group are metals. This is because______________?
it forms molecular addition compounds
it has small size
it has high nuclear charge
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following will not give addition reaction with NaHSO3________________?
CH3-CH2-CHO
None of the above
HCHO
CH3CHO
Explanation:
The correct answer to the question is: CH3-CH2-CHO
Q.
The common oxidation state of lanthanides is_________?
+1
+3
+2
+4
Explanation:
The correct answer to the question is: +3
Q.
The decomposition of nitroglycerine is an example of:
Self catalytic reaction
induced catalysis
Enzyme catalytic reaction
Autocatalytic reaction
Explanation:
The correct answer to the question is: Autocatalytic reaction
Q.
Which of the following will give phosphoric acid one reaction with water_________________?
PCI5
P2O5
P2O3
All of the above
Explanation:
The correct answer to the question is: All of the above
Q.
Which one of the following serve as aquatic solar fuel cell:
Bacteria
Algae
Fungi
Virus
Explanation:
The correct answer to the question is: Algae
Q.
The Bond Energy of H-F is________?
281kJ/mol
562kJ/mol
456kJ/mol
None
Explanation:
The correct answer to the question is: 562kJ/mol
Q.
Barometer was invented by _______?
Newton
Torricelli
Pascal
Huygen
Explanation:
The correct answer to the question is: Torricelli
Q.
Which of the following do not give aldol condensation reactions ?
diemthyl ketone
formaldehyde
acetaldehyde
propionaldehyde
Explanation:
The correct answer to the question is: formaldehyde
Q.
Electromeric effect is ____________?
Permanent effect
None of the above
temporary effect
Operate due to electronegativity difference
Explanation:
The correct answer to the question is: temporary effect
Q.
In electrolysis of NaCl the product obtained at cathode is_______.
Chloride ions
Both
Remain at the bottom of the cell
Sodium ions
Explanation:
The correct answer to the question is: Sodium ions
Q.
The term internal salt refers to_____________________?
Non-polar structure of amino acids
Acidic character of amino acids
Dipolar character of amino acids
Basic character of amino acids
Explanation:
The correct answer to the question is: Dipolar character of amino acids
Q.
The composition of brown ring in nitrate test is_________________?
FeSO4.N2o
FeSO4.No
FeSO4.No2
FeSO4.No3
Explanation:
The correct answer to the question is: FeSO4.No
Q.
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
R/2
2 R
3R/4
R/4
Explanation:
The correct answer to the question is: 3R/4
Q.
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Rubidium
Sodium
Potassium
Lithium
Explanation:
The correct answer to the question is: Lithium
Q.
Which of the following is most soluble on water?
BaSO4
CaSO4
SrSO4
MgSO4
Explanation:
The correct answer to the question is: MgSO4
Q.
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
Substitution reaction
Oxidation reaction
Elimination reaction
Addition reaction
Explanation:
The correct answer to the question is: Oxidation reaction
Q.
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
They are more reactive
All
They have greater atomic radii
They have smaller atomic sizes
Explanation:
The correct answer to the question is: They have smaller atomic sizes
Q.
Hydrogen bonding is present in __________?
Water
Phenol
All of these
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 ___________?
Geminal dihalides
Diols
Glycols
Vicinal dihalides
Explanation:
The correct answer to the question is: Vicinal dihalides
Q.
The colour of chlorine gas is_______________?
freenish yellow
pale yellow
grayish black
reddish brown
Explanation:
The correct answer to the question is: freenish yellow