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Top Chemistry MCQS Questions
Q.
Transition temperature for tin grey & tin white is : _____________?
18°C
128.15°C
96°C
246.12°C
Explanation:
The correct answer to the question is: 18°C
Q.
Beillstein test is used for________?
N2
CO
Cl
CO2
Explanation:
The correct answer to the question is: Cl
Q.
Main use of salt in diet is to : ___________?
ease the process of cooking
produce small amount of hydrochloric acid required for digestion
increase the taste
inclease solubility of food particles in water
Explanation:
The correct answer to the question is: produce small amount of hydrochloric acid required for digestion
Q.
Quantum numbers are __________ ?
Arithmetical values
Logical values
Numerical values
Leometric values
Explanation:
The correct answer to the question is: Numerical values
Q.
Hexamethylene diamine and adipic acid combine to form _____________?
Synthetic rubber
nylon 6-6
Natural rubber
Polystyrene
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Which of the following does not give Borax bead test ?
A1
Cu
Ni
Cr
Explanation:
The correct answer to the question is: A1
Q.
The concept of ensemble was introduced by____________?
Mexwell
Carnot
Boltzmann
Gibbs
Explanation:
The correct answer to the question is: Gibbs
Q.
Which of the following is used in photography?
Na2S2O3
NaHSO3
Na2S
Na2SO3
Explanation:
The correct answer to the question is: Na2S2O3
Q.
At higher temperature, Ethyne on reaction with water in the presence of HgSO4 and H2SO4 gives:
Acetaldehyde
Ethyl alcohol
Acetic acid
Acetone
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
Mole of a reaction
Rate of reaction
Order of reaction
Explanation:
The correct answer to the question is: Order of reaction
Q.
The Clemmenson reduction of acetone yields
Ethanol
Propanol
Ethanal
Propane
Explanation:
The correct answer to the question is: Propane
Q.
One of the outstanding features of boron is its ability to form__________________?
Molecular addition compounds
Molecular crystals
Ionic compounds
Semiconductors
Explanation:
The correct answer to the question is: Molecular addition compounds
Q.
__________ is one of the allotropic modifications of carbon.
Silicon
Diamond
Graphite
Iodine
Explanation:
The correct answer to the question is: Diamond
Q.
Which of the following statement is correct ?
size of Na+ ion < Na atom
size of Na atom < Na+ ion
Cl- < Na+
size of Cl atoms > Cl- ion
Explanation:
The correct answer to the question is: size of Na+ ion < Na atom
Q.
Basicity of orthophosphoric acid is________?
3
4
2
5
Explanation:
The correct answer to the question is: 3
Q.
Which one of the following carbonate is water insoluble ?
K2CO3
CaCO3
Na2CO3
(NH4)2CO3
Explanation:
The correct answer to the question is: CaCO3
Q.
The molecular formula of Sucrose(Sugar) is___________?
CHO
CH
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
Methane
Ethanol
Acetic acid
Explanation:
The correct answer to the question is: Urea
Q.
Which of the following effects best explains that o-nitrophenol is insoluble in water?
Resonance effect
Intermolecular H-bonding
Isomeric effect
Inductive effect
Explanation:
The correct answer to the question is: Intermolecular H-bonding
Q.
Which of the following shows inert pair effect ?
silicon
boron
carbon
tin
Explanation:
The correct answer to the question is: tin
Q.
Which one can form complex ?
Li
Cr
K
Na
Explanation:
The correct answer to the question is: Li
Q.
The strongest hydrogen bonding is present in: _____________?
Ice
Acetone and chloroform
Ammonia gas
Ethanol
Explanation:
The correct answer to the question is: Ice
Q.
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Decomposition
Oxidation
Reduction
Both b & c
Explanation:
The correct answer to the question is: Both b & c
Q.
Which one is natron ?
NaHCO3
Na2CO3
Na2CO3.10H2O
Na2CO3.H2O
Explanation:
The correct answer to the question is: Na2CO3.H2O
Q.
Radiations are harmful as it:___________?
is unstable
Causes skin cancer
Alters body tissue
Causes anemia
Explanation:
The correct answer to the question is: Causes skin cancer
Q.
The chemical formula of sodium hypochlorite is________________?
NaClO2
NaClO4
NaCLO
NaClO3
Explanation:
The correct answer to the question is: NaCLO
Q.
Which C-X bond has the highest bond energy per mole ?
C-I
C-Br
C-C
C-F
Explanation:
The correct answer to the question is: C-F
Q.
In water molecule, Hydrogen & water are held together by ______ bond.
Ionic
Hydrogen
Covalent
Dating
Explanation:
The correct answer to the question is: Covalent
Q.
Which of the halogen can displace other three elements ?
Chlorine
Flourine
Bromine
Iodine
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_____.
Reforming
Refining
Cracking
Isomerization
Explanation:
The correct answer to the question is: Cracking
Q.
Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
acetaldehyde
propanone
carbondioxide
formaldehyde
Explanation:
The correct answer to the question is: carbondioxide
Q.
The ore CaSO4.H2O has the general name_______________?
Gypsum
Dolomite
Plaster of Paris
Calcite
Explanation:
The correct answer to the question is: Gypsum
Q.
Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?
oxidation
condensation polymerization
additional polymertization
elimination
Explanation:
The correct answer to the question is: condensation polymerization
Q.
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
None of these
Gay-Lussac’s law
Boyle’s law
Graham’s Law
Explanation:
The correct answer to the question is: Graham’s Law
Q.
Identify the correct statement regarding CO_______________?
it is used to prepare aerated drinks
it reacts with red blood cells of haemoglobin
it is powerful oxidizing agent
it combines with H2O to form carbonic acid
Explanation:
The correct answer to the question is: it reacts with red blood cells of haemoglobin
Q.
Treatment of sucrose with conc. HNO3 gives__________?
Oxalic acid
Laevulinic acid
Nitrosucrose
Glucose+ fructose
Explanation:
The correct answer to the question is: Nitrosucrose
Q.
Ethers show functional group isomerism with __________________?
aldehydes
alcohols
ketones
carboxylic acid
Explanation:
The correct answer to the question is: alcohols
Q.
which of the following is a non-crystalline solid pair?
diamond, wood
sucrose. glass
wood, glass
glass, table salt
Explanation:
The correct answer to the question is: wood, glass
Q.
When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
2 moles of ethane
1 mole of ethane
2 moles of butane
1 mole of butane
Explanation:
The correct answer to the question is: 1 mole of butane
Q.
Polyethylene Glycols are used in the preparation of which type of detergents?
Anionic detergents
Cationic detergents
All of above
Non-ionic detergents soap
Explanation:
The correct answer to the question is: Non-ionic detergents soap
Q.
Phenol was isolated by Runge from________________?
coaltar
none of these
vegetable oil
wood
Explanation:
The correct answer to the question is: coaltar
Q.
Out of Alkane, Alkene & Alkyne, which one is more acidic?
Alkane
Alkyne
All have same
Alkene
Explanation:
The correct answer to the question is: Alkyne
Q.
The coloured glassy mass in borax bead test is due to the formation of___________________?
metal boride
metal borate
metal meta borate
metal silicate
Explanation:
The correct answer to the question is: metal meta borate
Q.
The radiations with highest speed are _______.
Beta radiations
AOT
Alpha radiations
Gamma radiations
Explanation:
The correct answer to the question is: Gamma radiations
Q.
If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?
Annealing
Quenching
Nitriding
Tempering
Explanation:
The correct answer to the question is: Annealing
Q.
If volumetric analysis methyl orange indicator is used when_________?
Acid is strong
Acid is strong base is weak
Acid is weak
Bade is strong
Explanation:
The correct answer to the question is: Acid is strong
Q.
The weight of a metal of equivalent of 12 which will give 0.475g of its chloride is_______?
0.24g
0.16g
0.12g
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_________________?
C17H33COOH
C17H35COOH
C15H31COOH
C13H27COOH
Explanation:
The correct answer to the question is: C15H31COOH
Q.
Which one of the following is not an alkali metal ?
Caesium
Rubidium
Francium
Radium
Explanation:
The correct answer to the question is: Radium
Q.
Who discovered carbohydrates fats and proteins?
Jons Jacob Berzelius
Anselme Payen
Walter Bradford Cannon
William Prout
Explanation:
The correct answer to the question is: William Prout
Q.
During electrolysis of Water, the product obtained at cathode is ___________?
Oxygen Gas &Water
Only Water
Hydrogen Gas &Water
Only oxygen
Explanation:
The correct answer to the question is: Hydrogen Gas &Water
Q.
Which of the following is the weakest reducing agent ?
HC
HF
HBr
HI
Explanation:
The correct answer to the question is: HF
Q.
During sulphonation of benzene H2SO4 generates the electrophile _________________?
SO2
H+
HSO4-
SO3
Explanation:
The correct answer to the question is: SO3
Q.
Size of colloidal particles
In b/w true solution & suspension
greater than suspension
None of These
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_______________?
fluorine is restricted to -1 oxidation state
fluorine has lowest dissociation energy among the halogens
both B and C
fluorine follows octet rule and as well as extended octet rule
Explanation:
The correct answer to the question is: both B and C
Q.
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
carbonic acid
methanoic acid
ethanol
acetic acid
Explanation:
The correct answer to the question is: acetic acid
Q.
Antiseptic Urotropine formed by ____________?
Formaldehyde
Carboxylic acid
Ketone
Acetaldehyde
Explanation:
The correct answer to the question is: Formaldehyde
Q.
Hydrogenolysis results in the formation of________________?
alkane
alkene
aldehydes
alkyne
Explanation:
The correct answer to the question is: alkane
Q.
Which of the following reaction is not shown by ketones ?
reaction with 2 4 dinitrophenyl hydrazine
reaction with NaHSO3
reaction with Fehling solution
reaction with HCN
Explanation:
The correct answer to the question is: reaction with Fehling solution
Q.
Which one is Chloroform_________________?
CHCl3
CCl4
CH3Cl
CH2Cl2
Explanation:
The correct answer to the question is: CHCl3
Q.
Which of the following is not the name of any scientist?
Pauli exclusion principle
Le-Chatelier’s principle
Hund’s rule
Aufbau’s principle
Explanation:
The correct answer to the question is: Aufbau’s principle
Q.
Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?
Dows process
Friedel & Craft acylation
Clemmenson reduction
Friedel & Craft alkylation
Explanation:
The correct answer to the question is: Friedel & Craft alkylation
Q.
Methyl alcohol is not used__________________?
As a substitute for petrol
As an antifreezing agent
As a solvent
For denaturing of ethyl alcohol
Explanation:
The correct answer to the question is: As a substitute for petrol
Q.
Phonon is Quantum of___________?
Longitudinal wave
Electromagnetic wave
Transverse wave
Elastic wave
Explanation:
The correct answer to the question is: Elastic wave
Q.
Aluminium oxide is_________________?
Basic oxide
It does not exists
Acidic oxide
Amphoteric 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
3-hydroxy butanoic acid
2-Hydroxy propanoic acid
2-hydroxy butanoic acid
Explanation:
The correct answer to the question is: 2-Hydroxy propanoic acid
Q.
How much solar flux absorb by earth’s surface is used to drive hydrologic cycle:
1/5th
1/4th
1/3rd
1/2sec
Explanation:
The correct answer to the question is: 1/3rd
Q.
Ncleophilic addition reactions are catalysed__________________?
Acid
Both A and B
Base
None
Explanation:
The correct answer to the question is: Both A and B
Q.
Oxidation state +1 for phosphorous is found in___________?
H3PO4
H3PO3
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
C6H5OH
C6H5CH(OH)2
C6H5CH2OH
Explanation:
The correct answer to the question is: C6H5CH2OH
Q.
Which of the following substances does not give iodoform test ?
acetaldehyde
ethyl alcohol
acetone
methyl alcohol
Explanation:
The correct answer to the question is: methyl alcohol
Q.
The purpose of Smelting an ore is to________?
Reduce it
Obtain an alloy
Oxidize it
Separate volatile impurities
Explanation:
The correct answer to the question is: Reduce it
Q.
On reduction with LiAlH4 ,Ketone gives__________?
Tertiary alcohol
Primary Alcohol
None of These
Secondary Alcohol
Explanation:
The correct answer to the question is: Secondary Alcohol
Q.
Which one of the following methods will not give benzene ?
Heating sod. Salt of Benzoic acid with soda lime
Distilling phenol with Zn dust
Hydrolysis of benzene sulphonic acid with super heated steam
Chlorobenzene with NaOH at 360°C & 150atm.
Explanation:
The correct answer to the question is: Chlorobenzene with NaOH at 360°C & 150atm.
Q.
Bromine can be liberated from KBr solution by the action of _______________?
Iodine solution
Ki
NaCl
Chlorine
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:
1s2,2s2,2p6,3s2
1s2,2s2,2p6
1s2,2s2,2p6,3s1
None of these
Explanation:
The correct answer to the question is: 1s2,2s2,2p6,3s1
Q.
The most electronegative element among the following is_________________?
Sb
P
N
As
Explanation:
The correct answer to the question is: N
Q.
A theoretical link between quantum mechanics and thermodynamics is_________?
Statistical thermodynamics
Electrchemistry
Matrix mechanics
Soectroscopic analysis
Explanation:
The correct answer to the question is: Statistical thermodynamics
Q.
Which of the following has lowest lattice energy?
NaCl
LiF
CsI
KBr
Explanation:
The correct answer to the question is: CsI
Q.
Ketones and Aldehydes are differentiate by using ______________?
Bendict solution
Silver Mirror test
Fehling solution
Nitroprusside test
Explanation:
The correct answer to the question is: Nitroprusside test
Q.
Nitration of chlorobenzene gives___________________?
o – chloronitrobenzene
A & B
m – chloronitrobenzene
p – chloronitrobenzene
Explanation:
The correct answer to the question is: A & B
Q.
What is the molecular Weight of Nitric acid (HNO3 ) ?
63.012 g/mol
70.012 g/mol
81.011 g/mol
65.012 g/mol
Explanation:
The correct answer to the question is: 63.012 g/mol
Q.
Which of the following will be acidic_____________?
all of the above
ethyne
1-butyne
propyne
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following is soluble in water?
AgF
AgCl
AgBr
AgI
Explanation:
The correct answer to the question is: AgF
Q.
How many electrons are there in benzene to form delocalized electron cloud________________?
3
8
4
6
Explanation:
The correct answer to the question is: 6
Q.
Which of the following is different with respect to physical appearance ?
Bismuth
Arsenic
Phosphorus
Antimony
Explanation:
The correct answer to the question is: Phosphorus
Q.
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
normal-alkane
iso-alkane
branched-alkane
neo-alkane
Explanation:
The correct answer to the question is: iso-alkane
Q.
Molozonide is unstable and changes into ozonide on_________________?
oxidation
hydrolysis
reduction
rearrangement
Explanation:
The correct answer to the question is: rearrangement
Q.
Which one of following is not a property of pure quartz ?
Hard
Coloured solid
Brittle
All of above
Explanation:
The correct answer to the question is: Coloured solid
Q.
SO2 reacts with Cl in sunlight to form__________?
Suphanyl chloride
Sulphuryl chloride
Sulphur dioxide
All of the above
Explanation:
The correct answer to the question is: Sulphuryl chloride
Q.
The IUPAC suffix used for _______ NC group?
Isocyanides
Cyanide
Carbylamines
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
None
Kinetic Molecular Theory
Dalton’s Theory
Explanation:
The correct answer to the question is: Kinetic Molecular Theory
Q.
The range of acid PH on PH scale is____________?
1 to 6
9 to 8
6 to 7
1 to 10
Explanation:
The correct answer to the question is: 1 to 6
Q.
Which of the following is a symmetrical ketone___________________?
acetone
3 – hexanone
butanone
2-pentanone
Explanation:
The correct answer to the question is: acetone
Q.
The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
Sulphur
Bromine
Fluorine
Chlorine
Explanation:
The correct answer to the question is: Sulphur
Q.
Among the halogens the rare element is________________?
Fluorine
Iodine
Chlorine
Astatine
Explanation:
The correct answer to the question is: Astatine
Q.
An organic compound has a triple bond and not double bond. It can be tested by __________?
Ammonical silver nitrate
Bromine water
Bayer’s reagent
Fehling solution
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
The system which exchange only energy with its surroundings is called______________?
Isolated system
All of the above
Open system
closed 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:____________-?
Air pollution
Soil pollution
Water pollution
Sound pollution
Explanation:
The correct answer to the question is: Air pollution
Q.
Which of the following noble gases is not present in atmosphere?
Helium
Argon
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_____________?
As nitrometer
To produce alloy
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________________?
S and P
Ca and S
Ca and P
we could not apply
Explanation:
The correct answer to the question is: Ca and S
Q.
Which of the following is more acidic in nature?
Cresol
Benzene
Phenol
Aniline
Explanation:
The correct answer to the question is: Phenol
Q.
The number of lone pairs in XeOF4 is_________?
3
O
1
2
Explanation:
The correct answer to the question is: 1
Q.
Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?
Nitrogen oxides
Cosmic rays
UV -rays
Free radicals
Explanation:
The correct answer to the question is: UV -rays
Q.
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
C6H12O6
C2H5O
C2H6O
C6H18O3
Explanation:
The correct answer to the question is: C6H18O3
Q.
Biodegradable pollutant is:_____________?
mercury salt
Domestic waste
DDT
Aluminum foil
Explanation:
The correct answer to the question is: Domestic waste
Q.
Azimuthal quantum number defines___________?
Spin of an electron
Angular momentum of an electron
e/m ratio of an electron
Magnetic momentum of an electron
Explanation:
The correct answer to the question is: Angular momentum of an electron
Q.
The product On the oxidation of 2°Alcohol is ________?
Aldehyde
Carboxylic acid
Ester
Ketone
Explanation:
The correct answer to the question is: Ketone
Q.
Reading of a Barometer going down is an indication of:___________?
Snow
Storm
Intense heat
Rainfall
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_______?
Sp
dsp2
Sp2
Sp3
Explanation:
The correct answer to the question is: Sp
Q.
Those aliphatic hydrocarbons which contain carbon to carbon single covalent bond in the chain are called ___________?
Alkanes
Alkynes
a & c
Alkenes
Explanation:
The correct answer to the question is: Alkanes
Q.
Cassiterite is an ore of_______?
Sn
Mn
Sb
Ni
Explanation:
The correct answer to the question is: Sn
Q.
Identify the Molecular mass for Glucose (C6H12O6) among the following.
98amu
190amu
180amu
188amu
Explanation:
The correct answer to the question is: 180amu
Q.
Mass spectroscopy mainly tells about ____________?
None of These
e/m ratio
Isotopes
Mass
Explanation:
The correct answer to the question is: e/m ratio
Q.
Absolute alcohol is obtained when rectified spirit is treated with__________________?
CaCl2
Ca(OH)2
CaCO3
CaO
Explanation:
The correct answer to the question is: CaO
Q.
The process of aluminium extraction is called__________________?
Haber process
Thermite process
Hall process
Contact process
Explanation:
The correct answer to the question is: Hall process
Q.
Ozonolysis of benzene produces___________________?
Both B & C
Glyoxal
Glycol
Vicinal diol
Explanation:
The correct answer to the question is: Glyoxal
Q.
Atom is the smallest particall which is_________?
Divisible
Both
Indivisible
Non of these
Explanation:
The correct answer to the question is: Indivisible
Q.
Kipps Apparatus is used to prepare_________?
NaOH
H²S
Cu
Cl²
Explanation:
The correct answer to the question is: H²S
Q.
Which of the following haloalkane is hydrolysed by SN1 mechanism?
CH3CH2Br
CH3CH2CH2Br
(CH3)3CBr
CH3Br
Explanation:
The correct answer to the question is: (CH3)3CBr
Q.
Effective volume is usually taken for ____________ ?
3moles of gas
1 mole of gas
5 moles of gas
2 moles of gas
Explanation:
The correct answer to the question is: 1 mole of gas
Q.
Aqueous solution of borax above 62°C gives crystals of________________?
Na2B4O7.2H2O
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?
None of the above
1.68 g/L
1.67 g/L
1.65 g/L
Explanation:
The correct answer to the question is: 1.68 g/L
Q.
Which of the following element has the maximum electron affinity_____?
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________________?
52%
8%
50%
60%
Explanation:
The correct answer to the question is: 52%
Q.
During Electrolysis of Water the product @cathode obtained is ___________?
CO & Water
Oxygen Gas & Water
Hydrogen Gas & Water
Hydrogen & Carbon monoxide
Explanation:
The correct answer to the question is: Hydrogen Gas & Water
Q.
The method in which more steam is passed through the water Gas to oxidize CO to Carbon Dioxide which is then more soluble in water than Hydrogen gas and gets separated is called______.
Bosch Process
Fragmentation
Thermal decomposition
liquification process
Explanation:
The correct answer to the question is: Bosch Process
Q.
Chemistry is given from ……language ?
Arabic
Latin
None of these
Greek
Explanation:
The correct answer to the question is: Greek
Q.
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
H2O
OH-
O
H+
Explanation:
The correct answer to the question is: H2O
Q.
When limestone reacts with water, which gas is released?
Carbon Dioxide
Hydrogen
Nitrogen
Oxygen
Explanation:
The correct answer to the question is: Carbon Dioxide
Q.
Which one of the following results in the discovery of proton.
X-rays
Alpha rays
Cathode rays
Canal rays
Explanation:
The correct answer to the question is: Canal rays
Q.
Downs cell is used to prepare_________________?
Sodium carbonate
Sodium metal
Sodium bicarbonate
Sodium hydroxide
Explanation:
The correct answer to the question is: Sodium metal
Q.
Aniline is a derivative of benzene which contains__________________?
Amide group
Amino group
Imino group
Nitro 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_________________?
Heat resistant
Low melting
Green in colour
Used to prepare chemical garden
Explanation:
The correct answer to the question is: Heat resistant
Q.
The carbon atom of carbonyl group is__________________?
sp2 hybridized
sp hybridized
dsp2 hybridized
cp3 hybridized
Explanation:
The correct answer to the question is: sp2 hybridized
Q.
Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?
Primary alcohol
All of above
Secondary alcohol
Tertiary alcohol
Explanation:
The correct answer to the question is: Tertiary alcohol
Q.
Example of linear polymer is ______________?
PVC
both A and C
High density polythene
Low density polythene
Explanation:
The correct answer to the question is: both A and C
Q.
Dehalogenation of ethyl tetrahalide will give____________________?
all of the above are possible
ethene
ethyl halide
ethyne
Explanation:
The correct answer to the question is: ethyne
Q.
The maximum amount of product obtained by balanced chemical equation is called as __________?
NOT
Practical yield
Actual yield
Theoretical yield
Explanation:
The correct answer to the question is: Theoretical yield
Q.
K2Cr2O7/H2SO4 generate____________________?
Nascent hydrogen[H]
Hydrogen
Oxygen
Nascent oxygen[O]
Explanation:
The correct answer to the question is: Nascent oxygen[O]
Q.
The science of fermentation is called _______ ?
Zymology
Zymurgy
Zygology
Zootaxy
Explanation:
The correct answer to the question is: Zymology
Q.
Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
ketone
ethylene epoxide
formaldehyde
both A & C
Explanation:
The correct answer to the question is: both A & C
Q.
What is the mass of one mole of Iodine?
254g
127g
74g
53g
Explanation:
The correct answer to the question is: 254g
Q.
The formula C6H5-CO-CH3 represents_______ ?
Acetic acid
Acetophenone
Phenyl acetate
Acetone
Explanation:
The correct answer to the question is: Acetophenone
Q.
Which of the following is used with milk of lime to kill fungus and molds?
Silver nitrate
Chlorine
Copper Sulfate
Nitric acid
Explanation:
The correct answer to the question is: Copper Sulfate
Q.
The stationary and mobile phases in paper chromatography are____________?
Liquid/solid
Solid/liquid
Liquid/gas
Liquid/liquid
Explanation:
The correct answer to the question is: Solid/liquid
Q.
R-Mg-Br is called___________________?
Metallic alkyl halide
Grignard reagent
Both A & B
Alkyl
Explanation:
The correct answer to the question is: Both A & B
Q.
Benzene does not undergo___________________?
Oxidation reactions
Substitution reaction
Addition reaction
Polymerization reactions
Explanation:
The correct answer to the question is: Polymerization reactions
Q.
When alcohol reacts with phosphorous halides it geive____________________?
alkanes
alkyl amine
alkyl halides
alkynes
Explanation:
The correct answer to the question is: alkyl halides
Q.
The bond length of C=C is___________?
1.68A°
1.20A°
1.34A°
1.54A°
Explanation:
The correct answer to the question is: 1.68A°
Q.
Universe is almost 70% made up of __________?
Chlorine
Carbon
Hydrogen
Helium
Explanation:
The correct answer to the question is: Hydrogen
Q.
Which of the following is unit of Viscosity?
Poise
Torr
Hertz
Decibell
Explanation:
The correct answer to the question is: Poise
Q.
Fehling solution react with HCHO to form precipitate of _____________?
Red colour
White colour
Blue colour
Yellow colour
Explanation:
The correct answer to the question is: Red colour
Q.
Nitronium ion is___________________?
NO2+
NO2-
NO3
NO
Explanation:
The correct answer to the question is: NO2+
Q.
Silver mirror is a test for ____________?
Thio alcohols
Ethers
Amines
Aldehydes
Explanation:
The correct answer to the question is: Aldehydes
Q.
What is the formula of Copper Sulfate?
CuSO3.4H2O
CuSO4.5H2O
CuSO3.5H2O
CuSO4.4H2O
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
Vander Waals forces are stronger in_______________?
I2
Cl2
F2
Br2
Explanation:
The correct answer to the question is: I2
Q.
Element that have same number of neutrons are called__________?
isotone
None of these
isotope
isobar
Explanation:
The correct answer to the question is: isotone
Q.
Which one of the following compound does not have – OH group___________________?
picric acid
ethylene glycol
ethyl acetate
glycerol
Explanation:
The correct answer to the question is: ethyl acetate
Q.
The halogen having highest electron affinity is_____________________?
Bromine
Fluorine
Iodine
Chlorine
Explanation:
The correct answer to the question is: Chlorine
Q.
The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
PCI5
SOCl2 / Pyridine
PCI3
Zn / HCI
Explanation:
The correct answer to the question is: SOCl2 / Pyridine
Q.
The deliquescence is a property in which a solid____________________?
Increases the number of water of crystallization
Loses water of crystallization
Absorbs moisture and remains solid
Absorbs moisture and turns to liquid form
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+2
CnH2n+1
Explanation:
The correct answer to the question is: CnH2n
Q.
Oxalate ion behaves as a ________ ligand.
Unidentate
Bidentate
Hexadentate
Tridentate
Explanation:
The correct answer to the question is: Bidentate
Q.
Clemmensens reduction infolves the reduction of___________________?
ketone
aldehyde
alkane
all of the above
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following does not contain phosphorus ?
Steel
Nerves
Bone
Yolk of egg
Explanation:
The correct answer to the question is: Steel
Q.
In a molecule of carbon monoxide, what are the formal charges on the two atoms?
Carbon=0, Oxygen= -1
Carbon=0, Oxygen=0
Carbon= +1, 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__________?
Animal wastes
Forest residues
Aquatic plants
None of these
Explanation:
The correct answer to the question is: Animal wastes
Q.
Electrolysis of dilute solution of NaCl results at the anode_______________?
hydrogen
oxygen
chlorine
sodium
Explanation:
The correct answer to the question is: oxygen
Q.
The Boiling Point of Ethyl Alcohol is_________?
56°C
58°C
78°C
73°C
Explanation:
The correct answer to the question is: 78°C
Q.
Nitrates of which pair of elements give different products on thermal decomposition ?
Li Ca
Li Na
Mg Ca
Na K
Explanation:
The correct answer to the question is: Li Na
Q.
Example of copolymers is _____________?
Polyethylene
nylon 6-6
PVC
Orlon
Explanation:
The correct answer to the question is: nylon 6-6
Q.
Traffic policemen on duty at busy street crossings during heavy traffic rush hours are advised to use:__________?
None of these
Nitrogen tank
Oxygen tank
Hydrogen tank
Explanation:
The correct answer to the question is: Oxygen tank
Q.
When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
propanoic acid
propanal
propanol
propane
Explanation:
The correct answer to the question is: propanoic acid
Q.
Methanol can be obtained from_________________?
destructive distillation of wood
water gas
methane
all
Explanation:
The correct answer to the question is: all
Q.
An acid-Base Reaction is always a/an __________?
Exothermic
Fission
Endothermic
Fusion
Explanation:
The correct answer to the question is: Exothermic
Q.
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Graham’s Law
Boyle’s law
Charles’ Law
Avogadro’s Law
Explanation:
The correct answer to the question is: Charles’ Law
Q.
Arsenic oxides are removed by passing through_________________?
Sodium hydroxide
Ferric hydroxide
Aluminium hydroxide
Calcium hydroxide
Explanation:
The correct answer to the question is: Ferric hydroxide
Q.
Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
dihydric alcohol
secondary alcohol
primary alcohol
tertiary alcohol
Explanation:
The correct answer to the question is: primary alcohol
Q.
Which compound is also known by the name of carbolic acid ?
H2CO3
H3PO3
C6H5OH
C2H2OH
Explanation:
The correct answer to the question is: C6H5OH
Q.
The blotting paper helps observe liquid by__________?
Boldness
Surface Action
Capillary Action
Viscosity
Explanation:
The correct answer to the question is: Capillary Action
Q.
Which group contains elements that exist as monoatomic molecule?
18
2
14
1
Explanation:
The correct answer to the question is: 18
Q.
The ether used in Wurtz synthesis is__________________?
basic
aqueous
dry
acidic
Explanation:
The correct answer to the question is: dry
Q.
Bosch Process involves _______?
Oxidation
Reduction
Crackling
Isomerization
Explanation:
The correct answer to the question is: Oxidation
Q.
Value of normal atmospheric pressure at sea level at 0°C is______?
76cm of Hg
760 Torr
All of these
1 atm
Explanation:
The correct answer to the question is: All of these
Q.
d-block elements are also called as __________?
Alkali Metals
Inner Transition
Outer Transition
Both B & C
Explanation:
The correct answer to the question is: Outer Transition
Q.
The carbon-carbon bond strength is maximum in__________?
CH3CH3
CH2=CH2
Cyclohexane
Benzene
Explanation:
The correct answer to the question is: CH3CH3
Q.
The criteria for aromaticity is presence of_________?
Presence of 4nπ electrons
Unsaturations
Cyclic structure
Presence of 4n+2π electrons
Explanation:
The correct answer to the question is: Presence of 4n+2π electrons
Q.
Which set of quantum numbers is not allowed?
n=2,l=2,m1=1,ms=-1/2
n=2,l=1,m1=0,ms=+1/2
n=2,l=0,m1=0,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?
f
d
S
P
Explanation:
The correct answer to the question is: S
Q.
Which one of the following species is not an electrophile ?
BF3
H+
Br+
NH3
Explanation:
The correct answer to the question is: NH3
Q.
Compounds of nitrogen and phosphorus are mostly________________?
all varieties are possible
polar
ionic
covalent
Explanation:
The correct answer to the question is: covalent
Q.
Which one of the following is not the use of graphite ?
Lead pencils
Lubricant
Abrasive
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 ?
Oxalic acid
Tartaric acid
Citric acid
Benzoic acid
Explanation:
The correct answer to the question is: Citric acid
Q.
What is chemical symbol for Tungsten?
Tn
Z
T
W
Explanation:
The correct answer to the question is: W
Q.
Ketones are comparatively less reactive than aldehdye. It is due to_______________?
steric hindrance
alkyl groups are electron donating
none
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
Shiff’s reagent gives pink color with ____________?
Acetone
Methyl acetate
Acetic acid
Acetaldehyde
Explanation:
The correct answer to the question is: Acetaldehyde
Q.
Which of the following compounds is not soluble in HNO3___?
CdS
PbS
CuS
AgCl
Explanation:
The correct answer to the question is: AgCl
Q.
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?
0.6N HSO
12 moles of KMnO
1.8 gram of HO
4.6 gram of CHOH
Explanation:
The correct answer to the question is: 12 moles of KMnO
Q.
Octane rating of Gasoline can be increased by __________?
Reforming
Refining
None of These
Cracking
Explanation:
The correct answer to the question is: Reforming
Q.
Actinides are the elements with atomic number from:
36 to 43
101 to 115
89 to 103
97 to 104
Explanation:
The correct answer to the question is: 89 to 103
Q.
Which one of the following compounds usually smells like garlic ?
P2O3
All have same smell
P2O5
H3PO3
Explanation:
The correct answer to the question is: P2O3
Q.
What is the molecular formula of Benzenetriozonide ?
C6H6O9
C6H6O6
C6H5O9
C6H5O8
Explanation:
The correct answer to the question is: C6H6O9
Q.
Addition of 2% gypsum in cement________________?
all of the above
Triggers hydration
Prevents rapid hardening
Triggers hydrolysis
Explanation:
The correct answer to the question is: Prevents rapid hardening
Q.
Neoprene is _______________?
Vulcanized rubber
All of the above
synthetic rubber
Natural rubber
Explanation:
The correct answer to the question is: synthetic rubber
Q.
SO3 is not absorbed in water directly because__________________?
It is insoluble in water
Dilute acid is produced
Reaction is exothermic
All of above
Explanation:
The correct answer to the question is: Reaction is exothermic
Q.
Sum of protons and neutrons in an atom gives off _________ ?
Atomic number
Mass number
Nucleon numbera
Both A and B
Explanation:
The correct answer to the question is: Both A and B
Q.
For the reaction 2HI ____________> H2+ I2
Kc > kp
Kp > kc
Kp ≤ kc
Kp= kc
Explanation:
The correct answer to the question is: Kp= kc
Q.
In SI base units, 1 Bq is equal to __________ ?
1.5 disintegration per second
10 disintegration per second
1 disintegration per second
0.01 disintegration per second
Explanation:
The correct answer to the question is: 1 disintegration per second
Q.
If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
High energy molecules continuously leaving the surface of liquid
The forces of attractions become stronger
Extra heat is spread in the air
The vapour pressure of the boiling liquid becomes greater than the external pressure
Explanation:
The correct answer to the question is: High energy molecules continuously leaving the surface of liquid
Q.
Which of the following noble gases is abundant in air?
Argon
Methane
Neon
Helium
Explanation:
The correct answer to the question is: Argon
Q.
Which is methyl cyanide_________________?
CH2 = CH – CN
CH3NO2
CH3CN
CH3NH2
Explanation:
The correct answer to the question is: CH3CN
Q.
Carboxylic acid on reduction with HI / phosphorous yields_________________?
alcohols
alkane
aldehydes
ketones
Explanation:
The correct answer to the question is: alkane
Q.
Cyclopentene is a _________?
Aliphatic
Alicyclic
Aromatic
None of These
Explanation:
The correct answer to the question is: Alicyclic
Q.
Atoms of all the elements always contain in nucleus:
Neutron
Proton
Neutron and electron
Proton and neutron
Explanation:
The correct answer to the question is: Proton
Q.
The hydrogenation of phenol in the presence of Ni and heat gives_________________?
n – hexane
cyclohexane
cyclohexanol
1 – hexanol
Explanation:
The correct answer to the question is: cyclohexanol
Q.
Which of the following is known as absolute zero?
-273.16C°
273.16C°
0C°
273K
Explanation:
The correct answer to the question is: -273.16C°
Q.
Nitrate (NO3) ions are obtained by the process of __________?
Fermentation
Nitrification
None of these
Denitrification
Explanation:
The correct answer to the question is: Nitrification
Q.
Coinage metals are actually_________?
Halogens
Transition metals
Alkaline earth metals
Alkali metals
Explanation:
The correct answer to the question is: Transition metals
Q.
What is the chemical symbol of “Potassium”?
K
P
Pt
Po
Explanation:
The correct answer to the question is: K
Q.
Vulcanized rubber is an example of ______________?
Natural polymers
semisynthetic polymers
None of These
Synthetic polymers
Explanation:
The correct answer to the question is: semisynthetic polymers
Q.
The second nuclear weapons used in warfare over Nagasaki, Japan, contain energy equal about of TNT?
25 kilotons
30 kilotons
20 kilotons
1.5 kilotons
Explanation:
The correct answer to the question is: 20 kilotons
Q.
Process used to separate insoluble particles from liquids is ___________ ?
Extraction
Sieving
Drying
Filtration
Explanation:
The correct answer to the question is: Filtration
Q.
Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
Smaller electronegativity of alkali metals
Smaller ionic radius of these 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?
546 °C
273 K
200°C
546 K
Explanation:
The correct answer to the question is: 546 K
Q.
Oxygen and sulphur resemble in all except________________?
Polymeric
Show allotropy
Electronic conviguration of valence shell electrons
Show same oxidation state
Explanation:
The correct answer to the question is: Show same oxidation state
Q.
Phosphoric acid is a weak acid and its basicity is____________________?
3
zero
2
1
Explanation:
The correct answer to the question is: 3
Q.
Viscosity of a liquid________by increasing temperature?
Remains same
None
Decreases
Increases
Explanation:
The correct answer to the question is: Decreases
Q.
Presence of nitrogen in organic compounds is tested as__________?
CN‾
NO
NH3
Nitrogen gas
Explanation:
The correct answer to the question is: CN‾
Q.
Water molecule is________?
Triangular planer
V-shaped
Angular
Pyramidal
Explanation:
The correct answer to the question is: V-shaped
Q.
Which of the following method is used to separate Hydrogen gas from water Gas?
Bosch Process
Palladium process
Steam 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
Cd , Pb
Zn, Mn
As, CD
Explanation:
The correct answer to the question is: Hg, Pb
Q.
The petrol having octane number 80 has ____________?
20% n- heptane + 80% n-octane
20% n- heptane + 80% iso-octane
80% n-heptane + 20% n- octane
80% n- heptane + 20% iso-octane
Explanation:
The correct answer to the question is: 20% n- heptane + 80% iso-octane
Q.
Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
CHCHCHO + CHCOOH
CHCOOH + CO
CHCHCHO + CHCHO
CHCHCOOH + CHCOOH
Explanation:
The correct answer to the question is: CHCHCOOH + CHCOOH
Q.
Carnalite has chemical formula__________________?
KCI
Na2B4O7.10H2O
KCI.MgCl2.6H2O
CaCO3.MgCO3
Explanation:
The correct answer to the question is: KCI.MgCl2.6H2O
Q.
Allotropic form of phosphorus that is poisonous is___________________?
White
Violet
Black
Red
Explanation:
The correct answer to the question is: White
Q.
Dry distillation of calcium acetate results in the formation of_________________?
acetone
acetaldehyde
formaldehyde
methane
Explanation:
The correct answer to the question is: acetone
Q.
The quality of petrol is improved by ____________?
Reforming
Cracking
Refining
Hydration
Explanation:
The correct answer to the question is: Reforming
Q.
In the presence of Zn, Hydrolysis of ozonide of 1-butene gives:_____________?
Ethylene only
Acetaldehyde and Formaldehyde
Propionaldehyde and Formaldehyde
Acetaldehyde only
Explanation:
The correct answer to the question is: Propionaldehyde and Formaldehyde
Q.
Alkenes are produced from dehalogenation of________________?
trihalo alkane
dihalo alkane
vicinal dihalo alkane
vicinal trihalo alkane
Explanation:
The correct answer to the question is: vicinal dihalo alkane
Q.
The hybridization of nitrogen atom in pyridine is_______?
Sp3
Sp
It is not hybridized
Sp2
Explanation:
The correct answer to the question is: Sp2
Q.
Ammonia may be prepared by heating ammonium chloride with_______________?
NaCl
H2SO4
Water
Aqueous sodium hydroxide
Explanation:
The correct answer to the question is: Aqueous sodium hydroxide
Q.
The type of hybridisation of boron in diborane is______?
Sp2- hybridisation
Sp3d2- hybridisation
Sp3- hybridisation
Sp- hybridisation
Explanation:
The correct answer to the question is: Sp- hybridisation
Q.
The gas used in manufacturing of urea fertilizer__________________?
C2H2
C2H6
C2H4
CH4
Explanation:
The correct answer to the question is: CH4
Q.
What is the color of copper sulfate crystalline?
Blue
White
Brown
Green
Explanation:
The correct answer to the question is: Blue
Q.
Which of the following statements is incorrect about halogens ?
All the halogens react with noble gases to form their halides
All the halogens have electronic conviguration ns2p5
They have high electron attinity and ionization energy
All are non-metals
Explanation:
The correct answer to the question is: All the halogens react with noble gases to form their halides
Q.
The shielding Effect across the period __________?
Decreases
Increases
None of them
Remains Same
Explanation:
The correct answer to the question is: Remains Same
Q.
The pH of milk is_______?
9
12
6.5-7
8
Explanation:
The correct answer to the question is: 6.5-7
Q.
Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
700⁰C
1300⁰C
900⁰C
500⁰C
Explanation:
The correct answer to the question is: 700⁰C
Q.
The number of moles are present in 9.5g of CS2?
0.25
1.5
None of These
0.125
Explanation:
The correct answer to the question is: 0.125
Q.
Which of the following has acidic hydrogen?
Ethane
Ethene
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
K2CrO4
AgNO3
K2Cr2O7
Explanation:
The correct answer to the question is: CuSO4.5H2O
Q.
The given dissociation constant (Ka) value 1.3×10-10 is of_________________?
Alcohol
Water
Acetic acid
Phenol
Explanation:
The correct answer to the question is: Phenol
Q.
The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
all above
fats and oils
fats and proteins
proteins and oild
Explanation:
The correct answer to the question is: fats and oils
Q.
Which of the following gases is used for welding?
Ethane
Acetylene
Ethene
Methane
Explanation:
The correct answer to the question is: Acetylene
Q.
Tetraethyl lead is used as______?
Mosquito Repellent
Petrol Additive
Pain Killer
Fire Extinguisher
Explanation:
The correct answer to the question is: Petrol Additive
Q.
Oobleck is the mixture of _________?
Gram Flour and Water
Cornstarch 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 ?
ns2p2
ns2p4
ns2p6
ns2p5
Explanation:
The correct answer to the question is: ns2p5
Q.
The volume strength of 1.5 N H2O2 solution is_______?
4.8
8.8
5.2
8.4
Explanation:
The correct answer to the question is: 8.4
Q.
Aldehyde and ketone have same general formula for homologous series_________________?
CnH2nOn+1
CnH2nO
CnH2nO2n
CnH2n
Explanation:
The correct answer to the question is: CnH2nO
Q.
The anhydride of HCIO4 is_________________?
Cl2O6
ClO2
Cl2O
Cl2O7
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?
Cationic
Neutral
Nonionic
Anionic
Explanation:
The correct answer to the question is: Nonionic
Q.
Which of the following reactions may be assoclated with aldehyde and ketone ?
oxidation
all of the above
polymerization
nucleophile addition
Explanation:
The correct answer to the question is: all of the above
Q.
For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?
3P/T
P/3
6P
3P
Explanation:
The correct answer to the question is: P/3
Q.
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
Nitrates
Sulphonides
Lime
Zeolites
Explanation:
The correct answer to the question is: Zeolites
Q.
Metal are highly ___________ ?
Neutral
Electropositive
Both of these
Electronegativity
Explanation:
The correct answer to the question is: Electropositive
Q.
The oxidation of secondary alcohol gives ?
alkane
Acetylene
ketone
carboxylic acid
Explanation:
The correct answer to the question is: ketone
Q.
Which of the following is the most Viscous?
Spirit
Honey
Glycerine
Water
Explanation:
The correct answer to the question is: Honey
Q.
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
Both A and B
H2SO4
P2O5
PCI5
Explanation:
The correct answer to the question is: Both A and B
Q.
Carbon,Diamond and Graphite are together called:___________?
Isomers
Allotrope
Isotopes
Isomorphs
Explanation:
The correct answer to the question is: Allotrope
Q.
Position of double bond in an organic compound is determined by ___________?
Reduction
Ozonolysis
Hydrogenation
Oxidation
Explanation:
The correct answer to the question is: Ozonolysis
Q.
Which is used for artificial ripening of fruit ?
ethane
ethene
methane
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
Benzene sulphonic acid
acetylene
N-hexane
Explanation:
The correct answer to the question is: N-hexane
Q.
The compound (CH3)3COH according to IUPAC is known as ___________?
Tert Alcohol
2,2-Dimethyl-propanol
Tert-Butanol
1,1- Diethylethanol
Explanation:
The correct answer to the question is: 2,2-Dimethyl-propanol
Q.
Which one of the following is a bridge element?
K
P
Cl
Be
Explanation:
The correct answer to the question is: Be
Q.
The main contributor to toxicity of detergent:
Na-sulphate solution
Na-Silicate solution
K-Chloride solution
Na-Chloride solution
Explanation:
The correct answer to the question is: Na-Silicate solution
Q.
In Periods from Left to right Electronegativity will: _________?
constant
increase
decrease
none of these
Explanation:
The correct answer to the question is: increase
Q.
Formula of Galena is________?
FeS2
PbS
AS2S3
HgS
Explanation:
The correct answer to the question is: PbS
Q.
Glycine is the name of an amino acid because___________________?
Bitter taste
Sweet taste
Green colour
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_______________?
Double displacement reaction
Disproportionation reaction
Displacement reaction
Reduction reaction
Explanation:
The correct answer to the question is: Disproportionation reaction
Q.
Which one of the following statement is correct for urea ?
it is an inorganic water soluble compound
it is a natural fertilizer
it provides micronutrients to the plants
it is a synthetic fertilizer
Explanation:
The correct answer to the question is: it is a synthetic fertilizer
Q.
What is the order of kinetics in the SN1 mechanism ?
First
Third
Zero
Second
Explanation:
The correct answer to the question is: First
Q.
Reacting bromine with benzene in the presence of sunlight will result in_______________?
Substitution reaction
Addition reaction
No-reaction
The rupturing of benzene ring
Explanation:
The correct answer to the question is: Addition reaction
Q.
What is the molecular weight of Ammonia (NH3) ________ ?
18.031 g/mol
17.031 g/mol
27.033 g/mol
19.031 g/mol
Explanation:
The correct answer to the question is: 17.031 g/mol
Q.
Vinylacetylene combines with HCI to form___________________?
benzene
divinyl acetylene
polyacetylene
chloroprene
Explanation:
The correct answer to the question is: chloroprene
Q.
Ethene is the first member of __________?
None of These
Saturated hydrocarbon
Aromatic hydrocarbon
Alkenes Family
Explanation:
The correct answer to the question is: Alkenes Family
Q.
The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?
hydrolysis
saponification
esterification
neutralization
Explanation:
The correct answer to the question is: esterification
Q.
Percentage of lead in lead pencil is________?
20
Zero
80
70
Explanation:
The correct answer to the question is: Zero
Q.
Indicate the correct statement__________________?
Cl2 is insoluble in water
I2 is a volatile solid
Cl2 is the strongest oxidizing agent
Br2 is more reactive than Cl2
Explanation:
The correct answer to the question is: I2 is a volatile solid
Q.
The most powerful oxidizing agent among the halogens is__________________?
Cl2
F2
I2
Br2
Explanation:
The correct answer to the question is: F2
Q.
Acetal on acid hydrolysis generates__________________?
Both A & B
Alcohol
None of the above
Ketone
Explanation:
The correct answer to the question is: Both A & B
Q.
Air is a/an _________?
Compound
Electrolyte
Mixture
Element
Explanation:
The correct answer to the question is: Mixture
Q.
The valency of Carbon is _________?
2(Divalent)
4(Tetravalent)
3(Trivalent)
1(univalent)
Explanation:
The correct answer to the question is: 4(Tetravalent)
Q.
Ionic solids do not conduct the electrical current because:
Free electrons are less
The coordination number of ion is very high
Ions don’t have translatory motion
Strong covalent bonds are present in their structure
Explanation:
The correct answer to the question is: Ions don’t have translatory motion
Q.
Positron has __________charge.
-ve
+ve
Neutral
None of them
Explanation:
The correct answer to the question is: +ve
Q.
Reactivity due to pi-electrons is present in_________________?
both B & C
alkyne
alkene
alkane
Explanation:
The correct answer to the question is: both B & C
Q.
The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
135.5 KJ
159.6kJ
80.4 KJ
110.5 KJ
Explanation:
The correct answer to the question is: 159.6kJ
Q.
When SO2 solution is passed over which of the following it turns green?
P2O5
H2SO4
SO3
K2Cr2O7
Explanation:
The correct answer to the question is: K2Cr2O7
Q.
50% inversion of configuration of molecules take place in a___________________?
SN1 – reaction
E1 – reaction
SN2 – reaction
E2 – reaction
Explanation:
The correct answer to the question is: SN1 – reaction
Q.
What is the molecular formula for Nitric acid ________ ?
HN2O2
HNO3
H2NO4
HNO2
Explanation:
The correct answer to the question is: HNO3
Q.
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________?
s-electrons in Mg(Z = 12)
p-electrons in Ne(Z = 10)
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)
Explanation:
The correct answer to the question is: p-electrons in CI(Z = 17)
Q.
Crystals of Na2CO3. 10H2O when exposed to air_________________?
Gain water and remain solid
Lose water and remain solid
Remains unchanged
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_______?
1787
1885
1880
1785
Explanation:
The correct answer to the question is: 1787
Q.
In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?
CaO+ SiO2——> CaSiO3
2FeS+3O2——–> 2Fe+ SO2
Fe2O3+ 3CO——–> 2Fe+ 3CO2
FeSiO3———> FeSiO3
Explanation:
The correct answer to the question is: Fe2O3+ 3CO——–> 2Fe+ 3CO2
Q.
Which Oxide of Manganese is amphoteric?
MnO
Mn2O3
Mn2O7
MnO2
Explanation:
The correct answer to the question is: MnO2
Q.
Alum is used by dyers of cloth:
As mordant
Softening of hard water
As water purifier
fire proofing fabrics
Explanation:
The correct answer to the question is: As mordant
Q.
In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
Hydroxide ions to reach anode
All of the above
Cathode to decay
Chlorine gas to mix
Explanation:
The correct answer to the question is: Hydroxide ions to reach anode
Q.
Chromatography is used to separate _________ ?
Atoms
Solution
Mixtures
Molecules
Explanation:
The correct answer to the question is: Mixtures
Q.
What will be the PH of 0.01M ammonium chloride solution containing 10 mol per liter of ammonium chloride (pkb=4.76)?
7.24
6.24
5.24
8.24
Explanation:
The correct answer to the question is: 8.24
Q.
Which of the following is not a use of silicon ?
Lubricants
Water repellent
Hydraulic brakes
Antifreeze
Explanation:
The correct answer to the question is: Antifreeze
Q.
The absolute value of charge on electron was determined by ________ ?
Chadwick
Robert Millikan
Rutherford
J.J.Thomson
Explanation:
The correct answer to the question is: Robert Millikan
Q.
Calculate % of N in KNO3__________?
18.56%
None of these
14.34%
13.86%
Explanation:
The correct answer to the question is: 13.86%
Q.
Which of the following compounds will react with Tollens reagent ?
CH3-CH-CH3
CH3-CO-CH2-CH3
CH3-CHO
CH3-COOH
Explanation:
The correct answer to the question is: CH3-CHO
Q.
Tetrahydroborate ion is the source of_______________?
proton
H+
both A & amp; B
H-
Explanation:
The correct answer to the question is: H-
Q.
The molecular formula of Methane gas is___________?
NH
CO
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
The Maximum mass of an atom is present in ___________?
Nucleus
Energy levels
Shell
Orbit
Explanation:
The correct answer to the question is: Nucleus
Q.
The octane number of zero is assigned to____________?
2-methyl octane
n-heptane
3-methyl octane
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
1 amino and 1 carboxylic groups
2 amino and 2 carboxylic groups
2 amino groups and 1 carboxylic group
Explanation:
The correct answer to the question is: 2 carboxylic groups and 1 amino group
Q.
Petra means ______ ?
Sediment
Fuel
Rock
Petrol
Explanation:
The correct answer to the question is: Rock
Q.
Oxidation of primary alcohol gives________________?
ketone
Alkene then – COOH
Aldehyde
Ester
Explanation:
The correct answer to the question is: Aldehyde
Q.
Which one is not a nucleophile ?
C2H5O-
H3C+
SCN-
NH3
Explanation:
The correct answer to the question is: H3C+
Q.
The PH of the 1.3 × 10-4 NH4Cl is__________?
2.886
3.886
1.3
4.0
Explanation:
The correct answer to the question is: 3.886
Q.
Example of cross linked polymer is ____________?
Polyester
Nylon
bakelite
PVC
Explanation:
The correct answer to the question is: bakelite
Q.
The best indicator for titrating HCl with NH4OH is: _________?
phenopthalein
litmus
phenol red
methyl Orange
Explanation:
The correct answer to the question is: methyl Orange
Q.
Oxygen does not react with all except_________________?
Alkali
Metals
Water
Acid
Explanation:
The correct answer to the question is: Metals
Q.
Which of the following is more Basic in nature?
Ammonia
1°Alkyl ammine
2° Alkyl ammine
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 _________?
CH4
Xe
CO2
C2H4
Explanation:
The correct answer to the question is: CO2
Q.
The element of group VIA which is a non-metal is________________?
Po
Te
Se
S
Explanation:
The correct answer to the question is: S
Q.
Which of the following is metasilicic acid ?
H2SiO3
H3SbO4
H2SnO3
H3AsO4
Explanation:
The correct answer to the question is: H2SiO3
Q.
Second ionization potential of alkali metals are very high due to_______________?
being s-block elements
being metals
inert gas configurations
ns1 electronic configuration
Explanation:
The correct answer to the question is: inert gas configurations
Q.
The structure of H2O2 is_______?
Non- polar
Spherical
Linear
Planar
Explanation:
The correct answer to the question is: Non- polar
Q.
Which of the following oxides of iodine is used for quantitative analysis of CO ?
I4O2
I2O4
All are equally useful
I2O5
Explanation:
The correct answer to the question is: I2O5
Q.
Cannizzaros reaction is not given by__________________?
acetaldehyde
formaldehyde
benzaldehyde
trimethyl acetaldehyde
Explanation:
The correct answer to the question is: acetaldehyde
Q.
Which is the strongest acid ?
HCIO4
HCIO3
HCIO
HCIO2
Explanation:
The correct answer to the question is: HCIO4
Q.
In a group, atomic radii increase due to successive increase of _________ ?
Neutron shells
Electronic shells
Nucleus
Proton shells
Explanation:
The correct answer to the question is: Electronic shells
Q.
Which one exhibits aldol condensation____________________?
HCHO
CH3COCH3
C6H5CHO
Cl3CCHO
Explanation:
The correct answer to the question is: CH3COCH3
Q.
The number of ions produced by [Pt(NH3)]Cl2?
5
2
4
3
Explanation:
The correct answer to the question is: 3
Q.
Which electronic configuration corresponds to an element of group IIIA ?
1s2 2s2 2p4
1s2 2s2 2p6 3s2 3p6 4s2 3d1
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p3
Explanation:
The correct answer to the question is: 1s2 2s2 2p6 3s2 3p1
Q.
The organic acid that can be made from ethanol is_________________?
Acetic acid
Citric acid
Butanoic acid
Formic acid
Explanation:
The correct answer to the question is: Acetic acid
Q.
Atomic mass of an atom is present in the __________?
Orbital
Shell
Orbit
Nucleus
Explanation:
The correct answer to the question is: Nucleus
Q.
Evaporation is_____________?
Endothermic Reaction
Continuous Process
Surface Process
All of these.
Explanation:
The correct answer to the question is: All of these.
Q.
Ketones and aldehydes can be distinguished using ____________?
None of These
Fehling solution
Tollens reagent
Bendict solution
Explanation:
The correct answer to the question is: Tollens reagent
Q.
What is the chemical name of Oil of Vitriol?
Sulphuric Acid
Hydrochloric Acid
Nitric Acid
Muriatic Acid
Explanation:
The correct answer to the question is: Sulphuric Acid
Q.
Ostwald’s dilution law applicable to:
Weak electrolytes
Strong electrolytes
All electrolytes
Non electrolytes
Explanation:
The correct answer to the question is: Weak electrolytes
Q.
The PH of pure water at 25°C, kw=1×10-4____________?
7
None of above
14
Explanation:
The correct answer to the question is: 7
Q.
The Substance which resist in change in PH is called?
Osmosis
Active transport
Buffer
Neutralization
Explanation:
The correct answer to the question is: Buffer
Q.
In borax bead test which compound is formed_________?
Double oxide
Meta borate
Ortho burate
Tetra borate
Explanation:
The correct answer to the question is: Meta borate
Q.
Molecular orbital Theory is also called_________?
Antibondingtheory
Band theory
π and σ bonding theory
Bonding theory
Explanation:
The correct answer to the question is: Antibondingtheory
Q.
In which compound of Xenon the oxidation state of Xenon is + 6?
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 does not move
It does not carry any charge
It is present in nucleus
Explanation:
The correct answer to the question is: It does not carry any charge
Q.
Which of the following phenomenon is considered responsible for Global Warming?
Monsoon
Dry farming
Greenhouse effect
Fire in coal mines
Explanation:
The correct answer to the question is: Greenhouse effect
Q.
Stainless steel contains___________?
Fe+Cr+Ni
Cu+C+Ni
Fe+ Cr+Cu
Fe+Ni+Cu
Explanation:
The correct answer to the question is: Fe+Cr+Ni
Q.
The heaviest subatomic particle among the following is_________?
Electron
All have mass
Neutron
Proton
Explanation:
The correct answer to the question is: Neutron
Q.
The whole universe is made up of almost _______of Hydrogen?
80%
60%
70%
50%
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__?
Both at same time
Carbon Monoxide Gas
None of them
Hydrogen Gas
Explanation:
The correct answer to the question is: None of them
Q.
Who used the term Concentrationwindow to draw the arbitrary lines of demarcation
Dr.A.Walash
Einstein
S.E.Manhan
Schwartz
Explanation:
The correct answer to the question is: Schwartz
Q.
When Ammonia is used as a refrigerant in vapour compression cycle?
Material does not effect by refrigerant
Steel tubes used
Both a & b
Cu Tubing 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
Bromine water
Fehling solution
Explanation:
The correct answer to the question is: Ammonical silver nitrate
Q.
Law of mass action was proposed by Goldberg and Peter Waage in _________?
None of These
1866
1864
1888
Explanation:
The correct answer to the question is: 1864
Q.
Quality of petrol is measured by___________?
octane number
Heptane number
Reforming
Refining
Explanation:
The correct answer to the question is: octane number
Q.
Greater the heat of neutralization the acid will be____________?
more stronger
More weaker
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?
54.4 grams
55.4 grams
56.4 grams
53.4 grams
Explanation:
The correct answer to the question is: 54.4 grams
Q.
I3( Tri-iodine) has shape_________?
Square bipyramidal
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
methanol
glycerol
ethylene glaycol
Explanation:
The correct answer to the question is: glycerol
Q.
The preparation of benzene from acetylene can also be said as_________________?
Polymerization
Dehydration
Oxidation
Condensation
Explanation:
The correct answer to the question is: Polymerization
Q.
A elements are named as alkali metals because_______________?
Their oxide and hydroxides are water soluble
Both A & B
They are found in earth
Their oxides are basic
Explanation:
The correct answer to the question is: Both A & B
Q.
The reciprocal of the coefficent of viscosity is called__________?
Fluidity
Absorbance
Specific gravity
Density
Explanation:
The correct answer to the question is: Fluidity
Q.
Carbon in wrought iron is present as_________?
Graphite
Silicon carbide
Partly as iron carbide and partly as graphite
Iron 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-I
R-F
R-Br
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.
Li+²
Be+³
H
He+¹
Explanation:
The correct answer to the question is: Be+³
Q.
The reaction of Lucas reagent is the fastest with_________?
CH3(CH2)OH
(CH3)2CHOH
(CH3)3COH
CH3CH2OH
Explanation:
The correct answer to the question is: (CH3)3COH
Q.
The process by which a substance absorbs moisture upon exposure to atmosphere is called?
Dehydrogenation
Deliquescence
Efflorescence
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?
C2H4
C5H10
C3H6
C4H8
Explanation:
The correct answer to the question is: C4H8
Q.
Z number for chlorine is __________?
35.5
21
17
Explanation:
The correct answer to the question is: 17
Q.
Hydrocarbon is formed when Grignard reagent is treated with___________?
Both a and b
None of the above
CH3OH
H2O
Explanation:
The correct answer to the question is: H2O
Q.
Substance which is found in dried up lakes of Tibet and California is_______________?
Boric acid
Calcium carbonate
Colemanite
Tincal
Explanation:
The correct answer to the question is: Tincal
Q.
Electronic Configuration of Calcium (Ca) atom may be written as________?
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
All of the above
PbO2
Pb3O4
Explanation:
The correct answer to the question is: Pb3O4
Q.
The phenomenon of negative catalysis is also known as:
Self catalysis
Enzyme catalysis
auto catalysis
inhibition
Explanation:
The correct answer to the question is: inhibition
Q.
Which of the following is not a use of formaldehyde ?
in making acetic acid
in silvery mirror
in making throat lozenges
in making medicine urotropine
Explanation:
The correct answer to the question is: in making acetic acid
Q.
Upto ___________________ C atoms alkanes are gases?
6
2
4
3
Explanation:
The correct answer to the question is: 4
Q.
When the radiation of light is passed through a prism, it undergoes __________?
interference
reflection
diffraction
refraction
Explanation:
The correct answer to the question is: refraction
Q.
What is the mass percent of silver in silver notrate, AgNO3?
63.5%
65.6%
64.5%
61.5%
Explanation:
The correct answer to the question is: 63.5%
Q.
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
SO
CH
CH
SO
Explanation:
The correct answer to the question is: SO
Q.
Nucleus of an atom was discovered by___________?
James Chadwick
Rutherford
J J Thomson
Goldstein
Explanation:
The correct answer to the question is: Rutherford
Q.
Urea as a fertilizer contains:____________?
46% N
73% 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___________________?
sulphonation
halogenation
amination
nitration
Explanation:
The correct answer to the question is: nitration
Q.
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
Column chromatography
Extraction
Distillation
Gas chromatography
Explanation:
The correct answer to the question is: Column chromatography
Q.
Which metal is used as a reducing agent in Smelting______?
Cu
Al
C
Zn
Explanation:
The correct answer to the question is: C
Q.
The molar mass of an organic acids is determined by____________?
Depression of freezing point
Volumetric method
Victor Meyer’s method
Osmosis method
Explanation:
The correct answer to the question is: Volumetric method
Q.
Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
they have an electrophilic carbon & a bad leaving group
they have an electrophilic carbon
they have a nucleophilic carbon & a good leaving group
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%
73%
81%
Explanation:
The correct answer to the question is: 73%
Q.
Methyl alcohol on oxidation with acidified K2Cr2O7 gives__________?
HCOOH
CH3COCH3
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.
26%
<2.6%
27%
37%
Explanation:
The correct answer to the question is: 37%
Q.
Tincal is a mineral of___________________?
C
A1
Si
B
Explanation:
The correct answer to the question is: B
Q.
Which ion will have maximum value of heat of hydration ?
A1+3
Mg+2
Cs+
Ba+
Explanation:
The correct answer to the question is: A1+3
Q.
Which is artificial manmade fiber?
None of these
Boron
Rayon
Saffron
Explanation:
The correct answer to the question is: Rayon
Q.
Acetylene gives:
Red precipitate with both the reagents
White precipitate with CuCl and red precipitate with AgNO
White precipitate with AgNO and red precipitate with CuCl
White precipitate with both the reagents
Explanation:
The correct answer to the question is: White precipitate with AgNO and red precipitate with CuCl
Q.
Alkanes are also known as________________?
unsaturated hydrocarbon
saturated hydrocarbon
paraffins
both A & C
Explanation:
The correct answer to the question is: paraffins
Q.
Which element is necessary for normal leaf development ?
Mg
Ba
Ca
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
C2H2
Carbon monoxide
Methane
Explanation:
The correct answer to the question is: Carbon monoxide
Q.
Example of ‘globular’ proteins is __________ ?
Peptide
Primary protein
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 __________?
Ag
Sv
Au
At
Explanation:
The correct answer to the question is: Ag
Q.
The process in which no heat enters or leave the system known as _____________?
adiabatic
Isochoric
Isobaric
Isothermal
Explanation:
The correct answer to the question is: adiabatic
Q.
Hookworm is a parasitic worm that infects ______?
large intestine
small intestine
liver
lungs
Explanation:
The correct answer to the question is: small intestine
Q.
In isothermal process?
Volume of the system remains unchanged
No heat enter or leave the system
temperature of the system remains constant
Pressure of the system remains constant
Explanation:
The correct answer to the question is: temperature of the system remains constant
Q.
Electric bulb filament is made of__________?
Aluminum
Tungsten
Copper
Lead
Explanation:
The correct answer to the question is: Tungsten
Q.
Argon gas was discovered by_______?
Rayleigh
Ramsay
Dalton
Lockerey
Explanation:
The correct answer to the question is: Ramsay
Q.
Which statement is incorrect ?
All the metals form positive ions
All the metals are good conductor of heat
All the metals form acidic oxides
All the metals are good conductor of electricity
Explanation:
The correct answer to the question is: All the metals form acidic oxides
Q.
Water gas heated at 450?C and 200 atm pressure in the presence of ZnO+Cr2O3 will produce________________?
methanol
methane
methanol
carbonic acid
Explanation:
The correct answer to the question is: methanol
Q.
Ozonolysis of acetylene gives:
Glyoxal then formic acid
None
Glycol
Formaldehyde
Explanation:
The correct answer to the question is: Glyoxal then formic acid
Q.
Ethylene diammine is ligand________?
tri dentate
Bi dentate
Poly dentate
mono dentate
Explanation:
The correct answer to the question is: Bi dentate
Q.
The PH of Tears is __________?
8.2
7.4
7.8
7.0
Explanation:
The correct answer to the question is: 7.4
Q.
The substance used in cancer therapy is___________?
Fe
Ni
Rn
Co
Explanation:
The correct answer to the question is: Co
Q.
Boric acid cannot be used__________________?
In soda bottles
For enamel and glazes
As antiseptic in medicine
For washing eyes
Explanation:
The correct answer to the question is: In soda bottles
Q.
The hydrolysis of Benzenetrizonide will yield three moles of____________________?
Glycol
Glyoxal
Benzaldehyde
Glyoxime
Explanation:
The correct answer to the question is: Glyoxal
Q.
Strong Nucleophile in polar aprotic solvent?
Chloride ion
Iodide ion
Bromide 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____________?
Basic salt
Neutral 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 butanioc acid
2 3 -dihydroxy butanedioic acid
2 2 -dihydroxy butanoic acid
2 3-dihydroxy butance 1 4 -dioic acid
Explanation:
The correct answer to the question is: 2 3-dihydroxy butance 1 4 -dioic acid
Q.
The law of traids is applicable to__________?
Li, Be, B
Na, K, Rb
Cl, Br, I
F, Cl, Br
Explanation:
The correct answer to the question is: Cl, Br, I
Q.
Actinides are the elements with atomic numbers from __________?
36 to 43
101 to 115
97 to 104
89 to 103
Explanation:
The correct answer to the question is: 89 to 103
Q.
Marsh gas is _________?
Ethane
Methane
Nitrogen
Hydrogen
Explanation:
The correct answer to the question is: Methane
Q.
Transition elements, in general, exhibit the following properties, except one. Name that property?
Formation of alloys
Natural Radioactivity
Tendency to form complexes
Variable oxidation state
Explanation:
The correct answer to the question is: Natural Radioactivity
Q.
Which one of the followings possesses melting point below 0°C?
Bismuth
Phosphorus
Carbon
Nitrogen
Explanation:
The correct answer to the question is: Nitrogen
Q.
Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
electrophilic substitution
nucleophilic substitution
nucleophilic addition
electronphilic addition
Explanation:
The correct answer to the question is: nucleophilic addition
Q.
An alcohol produced during the formation of a soap process.
Ethylene glycol
Ethanol
Butanol
Glycerol
Explanation:
The correct answer to the question is: Glycerol
Q.
The quantity of petrol can be increased by ___________?
Reforming
Refining
Induction fueling
Cracking
Explanation:
The correct answer to the question is: Cracking
Q.
The oxidation of isopropyl alcohol will yield___________________?
Propanoic acid
propane
Propanol
Propanone
Explanation:
The correct answer to the question is: Propanone
Q.
Which of the following is not an amino acids_____________________?
aspartic acids
glumatic acid
lactic acid
glycine
Explanation:
The correct answer to the question is: lactic acid
Q.
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
CuCl2
PdCl2
PbCl2
Cu2Cl2
Explanation:
The correct answer to the question is: CuCl2
Q.
Species are formed in one step of reaction mechanism and used up in another step are called:
Intermediate
activated complex
Catalyst
inhibitor
Explanation:
The correct answer to the question is: Intermediate
Q.
The composition of ‘ Golden spangles is_________?
PbCrO4
BaCrO4
As2Cr2O7
PbI2
Explanation:
The correct answer to the question is: PbCrO4
Q.
Which one of the following radiation has the longer wavelength?
ultra violet
x-ray
infra red
visible
Explanation:
The correct answer to the question is: infra red
Q.
Barret esophagus is good example of__________?
Atrophy
Hypertrophy
Metaplasia
Dysplasia
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
CHO
NH
CH
Explanation:
The correct answer to the question is: CHO
Q.
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
Torsional strain
Angle strain
Orbital strain
Steric strain
Explanation:
The correct answer to the question is: Steric strain
Q.
diamond got brilliance due to following reason?
all of the above
reflection
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?
Evaporation
None
Decantation
Sublimation
Explanation:
The correct answer to the question is: Sublimation
Q.
Surface water contains:_____________?
only salt
Organic matter
Suspended impurity
Salt & Organic matter
Explanation:
The correct answer to the question is: Salt & Organic matter
Q.
The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
Filterate
Extract
Mother liquor
Molasses
Explanation:
The correct answer to the question is: Molasses
Q.
The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
Cone. HCI and anhydrous ZnCl2
Cone. HCI and anhydrous SOCl2
Cone. HCI and anhydrous PCl2
Cone. HCI and anhydrous CaCl2
Explanation:
The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Q.
The by-product of the process of Saponification is___________?
Sodium hydroxide
Glycol
Methanol
Glycerol
Explanation:
The correct answer to the question is: Glycerol
Q.
What is the color of precipitates of AgI?
Blue
Brown
Yellow
Light Yellow
Explanation:
The correct answer to the question is: Yellow
Q.
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
0.3 moles
0.4 moles
0.5 moles
0.2 moles
Explanation:
The correct answer to the question is: 0.2 moles
Q.
Aldehydes and ketones both, show the type of Isomerism is __________?
Functional Group Isomerism
chain Isomerism
Position Isomerism
Metamerism
Explanation:
The correct answer to the question is: Functional Group Isomerism
Q.
Cations possess __________ charge?
None
+ve
Neutral
-ve
Explanation:
The correct answer to the question is: +ve
Q.
By which method the molecular mass of benzene was determined as 78.108 ?
Distillation methos
Specific gravity method
Vapour density method
X-ray diffraction method
Explanation:
The correct answer to the question is: Vapour density method
Q.
CO2 is gas while SiO2 is solid at room temperature?
carbon is non-metal while silicon is semi-metal
Silicon has all sigma bonds
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 reacts with fats to form soap
It reacts with chlorine gas
It is used in soda water
It corrodes the organic tissues
Explanation:
The correct answer to the question is: It corrodes the organic tissues
Q.
The rectified spirit contains________________?
12% alcohol
100% alcohol
90% alcohol
95% alcohol
Explanation:
The correct answer to the question is: 95% alcohol
Q.
How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
Four
Two
Six
Three
Explanation:
The correct answer to the question is: Three
Q.
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
Deuterium dating
Carbon dating
Uranium dating
Radium dating
Explanation:
The correct answer to the question is: Carbon dating
Q.
Which of the following is the Radioactive isotope of Hydrogen?
Tritium
Protium
Deuterium
Nichromium
Explanation:
The correct answer to the question is: Tritium
Q.
The radiations with negative charge are________.
Beta radiations
Gamma radiations
positron
Alpha radiations
Explanation:
The correct answer to the question is: Beta radiations
Q.
Bleaching powder is an example of________________?
Normal salt
Double salt
Complex
Mixed salt
Explanation:
The correct answer to the question is: Mixed salt
Q.
What is the color of precipitates of AgBr?
Light brown
Light green
Light yellow
Light Blue
Explanation:
The correct answer to the question is: Light yellow
Q.
P2O5 is a hygroscopic powder which sublimes at______________?
620°C
360°C
260°C
630°C
Explanation:
The correct answer to the question is: 360°C
Q.
The IUPAC name of ethylene oxide is__________?
Oxoethene
Epoxy methane
Oxirane
Methoxymethane
Explanation:
The correct answer to the question is: Oxoethene
Q.
The concept of telluric helix was developed by___________?
A.E de Chancourtois
Newland
Dobereiner
Lother Meyer
Explanation:
The correct answer to the question is: A.E de Chancourtois
Q.
The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:
40g
43.6g
45g
41.4g
Explanation:
The correct answer to the question is: 43.6g
Q.
What catalyst is employed when benzene is prepared from acetylene at 70°C?
Cr2O3 + A2O3 + SiO2
Raney nickel
Organo-nickel
Ni 250 – 300°C
Explanation:
The correct answer to the question is: Organo-nickel
Q.
Milk tastes sour when kept in the open for sometime due to the formation of __________?
acetic acid
lactic acid
carbonic acid
citric acid
Explanation:
The correct answer to the question is: lactic acid
Q.
Alpha particles can be detected by using___________?
Barium sulphate
Thin Aluminium sheet
Gold foils
Zinc sulphide screen
Explanation:
The correct answer to the question is: Zinc sulphide screen
Q.
The equation that represents the relationship of Faraday’s first law of electrolysis is _______?
Z=At
w=Z/At
Z= At/M
w=ZAt
Explanation:
The correct answer to the question is: w=ZAt
Q.
The subatomic particle that has negative charge is___________?
Proton
Neutron
None of These
Electron
Explanation:
The correct answer to the question is: Electron
Q.
The reaction of C2H5OH with conc. H2SO4 does not give_________?
Ethene
Diethyl ether
Acetylene
Ethyl hydrogen sulphate
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
Both A & B
Sodium hexadecanoate
Sodium pentadecanoate
Sodium octadecanoate
Explanation:
The correct answer to the question is: Both A & B
Q.
The PH of the 0.0032 M H2SO4 is__________?
3.2
2.198
1.0
4.0
Explanation:
The correct answer to the question is: 3.2
Q.
Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
4e
2e
3e
e
Explanation:
The correct answer to the question is: 2e
Q.
Polyamides are synthetic polymers commonly known as___________?
Cellulose
Nylon
Protein
synthetic
Explanation:
The correct answer to the question is: Nylon
Q.
Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
Four
Five
Two
Three
Explanation:
The correct answer to the question is: Three
Q.
The distribution coefficient is related to:______________?
retardation factors
Colouring factors
decreasing factors
Separating factors
Explanation:
The correct answer to the question is: Separating factors
Q.
In Aldehydes and Ketones, carbon of carbonyl group is ____________?
Unhybridised
sp hybridised
sp hybridised
sp hybridised
Explanation:
The correct answer to the question is: sp hybridised
Q.
Formula of Chile saltpetre is__________________?
CaCO3
NaNO3
Ba (NO3)2
NH4Cl
Explanation:
The correct answer to the question is: NaNO3
Q.
Which of the following is the most reactive_________________?
ethyne
ethane
ethene
benzene
Explanation:
The correct answer to the question is: ethene
Q.
Where does the oxygen that keeps us alive come from?
Water
Carbon dioxide
Carbonates absorbed from soil
Oxides of minerals
Explanation:
The correct answer to the question is: Water
Q.
Which is the paramagnetic oxide of chlorine ?
Cl2O6
ClO2
Cl2O7
all
Explanation:
The correct answer to the question is: ClO2
Q.
Grignard reagent is reactive due to___________________?
the presence of magnesium atom
the polarity of C-Mg bond
all
the presence of halogen atom
Explanation:
The correct answer to the question is: the polarity of C-Mg bond
Q.
Real gases show ideal behavior at_______?
High Temp & High pressure
Low Temp & Low Pressure
Low Temp & High Pressure
High Temp & Low Pressure
Explanation:
The correct answer to the question is: High Temp & Low Pressure
Q.
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
0.065gm
7.5gm
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__________________?
formamint
aldomint
lactomint
formalactose
Explanation:
The correct answer to the question is: formamint
Q.
Solvent used in separation of biomolecules is _______________?
Alcohol
Ether
Acetone
Trichloroacetic acid
Explanation:
The correct answer to the question is: Trichloroacetic acid
Q.
The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
CO²+O²
CO³+H²O
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:____________?
Cinnamic acid
Tartaric acid
Pyruvic acid
Propionic acid
Explanation:
The correct answer to the question is: Pyruvic acid
Q.
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
n-propyl benzene
All
Toluene
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?
K2MnO4
CuSO4
CH3COOH
AgNO3
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.
11.11%
15.15%
31.13%
22%
Explanation:
The correct answer to the question is: 11.11%
Q.
Polyvinyl acetate is the Polymer of __________?
Vinyl acetate
Formaldehyde
Vinyl Chloride
Methyl methacrylate
Explanation:
The correct answer to the question is: Vinyl acetate
Q.
Formaldehyde on condensation in the presence of calcium hydroxide: ______________?
Fructose
Xylose
Maltose
Formose
Explanation:
The correct answer to the question is: Formose
Q.
Amino acids are a product of the digestion of: ___________?
Vitamins
Proteins
Fats
Carbohydrates
Explanation:
The correct answer to the question is: Proteins
Q.
O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
Ethyl alcohol
Ethylene glycol
HCHO
Ethylene oxide
Explanation:
The correct answer to the question is: HCHO
Q.
In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
three
four
two
one
Explanation:
The correct answer to the question is: one
Q.
Which instrument is used to measure the viscosity.?
Hydrometer
Anemometer
Viscometer
Hygrometer
Explanation:
The correct answer to the question is: Viscometer
Q.
For which mechanisms the first step involved is the same ?
E2 + SN2
E1 and SN1
E1 + E2
SN1 and SN2
Explanation:
The correct answer to the question is: E1 and SN1
Q.
In whole Periodic Table which element Is Most Reducing Agent ?
Chlorine
Neon
lithium
Helium
Explanation:
The correct answer to the question is: lithium
Q.
An alcohol which can be prepared by fermentation is_________________?
CH3 – CH2 – OH
C3H7OH
CH3OH
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_________________?
brick red
pink
yellow
black
Explanation:
The correct answer to the question is: brick red
Q.
Which of the following statements is false about transition metals?
They form coloured ions
All transition metal compounds are paramagnetic
They show variable valency
They form complexes
Explanation:
The correct answer to the question is: All transition metal compounds are paramagnetic
Q.
Which one of following amino acid is neither acidic nor a basic in nature ?
Proline
Histidine
Lysine
Glutamic acid
Explanation:
The correct answer to the question is: Proline
Q.
Which of the following will have the highest boiling point ?
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___________?
4.05 gram
5.05 gram
3.05 gram
2.05 gram
Explanation:
The correct answer to the question is: 3.05 gram
Q.
Which one of the following is most acidic?
P-nitrophenol
Phenol
M-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?
1-2Kg
1-3Kg
1-5Kg
1-4Kg
Explanation:
The correct answer to the question is: 1-2Kg
Q.
The average salinity of sea water is________?
2%
3%
3.5%
2.5%
Explanation:
The correct answer to the question is: 3.5%
Q.
Which element can form tripositive ion ?
Aluminium
Silicon
Beryllium
Carbon
Explanation:
The correct answer to the question is: Aluminium
Q.
The element used for the formation of alloys is__________?
Mercury
Iron
Calcium
Chromium
Explanation:
The correct answer to the question is: Chromium
Q.
Which one of the following halogens is present in Teflon________________?
I2
F2
Cl2
Br2
Explanation:
The correct answer to the question is: F2
Q.
Dimethyl ketones are usually characterized through_____________?
Benedict’s reagent
Schiff’s test
Tollen’s reagent
Iodoform test
Explanation:
The correct answer to the question is: Iodoform test
Q.
Which molecule have stronger London dispersion forces?
Hydrogen gas
Bromine
Water
Hydrochloric acid
Explanation:
The correct answer to the question is: Water
Q.
The IUPAC name of pyridines is__________?
Azine
Azolidins
Azolo
Diazine
Explanation:
The correct answer to the question is: Azine
Q.
The organic compound used as antiknock agent in petroleum is____________?
TNT
(CH )Pb
CH )Hg
CH MgBr
Explanation:
The correct answer to the question is: (CH )Pb
Q.
Identify among the following which is not the unsaturated hydrocarbon.
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Which one of the following is the correct sequence according to atomic weights?
Ni> Co> Fe
Co >Fe>Ni
Co > Ni > Fe
Fe>Co> Ni
Explanation:
The correct answer to the question is: Co > Ni > Fe
Q.
The Chemical Formula of Sand is___________?
Sr2O
SiO2
Al2O3
Si2O3
Explanation:
The correct answer to the question is: SiO2
Q.
Generally the limit of visible spectrum is__________?
12,000 to 15,000 A°
1000 to 300 A°
8000 to 10,000 A°
3800 to 7600 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________________?
Bakelite
Aniline formaldehyde plastic
urotropine
Nylon 66
Explanation:
The correct answer to the question is: Bakelite
Q.
Which of the following can be separated by ” Sublimation Method”?
Sand and Iron Filing
None
Both A & B
Sand and Naphthalene
Explanation:
The correct answer to the question is: Sand and Naphthalene
Q.
The rate of E1 reaction depends upon______________________?
the concentration of substrate
the concentration of substrate as well as nucleophile
the concentration of nucleophile
base the concentration of substrate as well as nucleophile
Explanation:
The correct answer to the question is: the concentration of substrate
Q.
The maximum mass is present in 1dm3 for the following gas at STP.
CO
CS
CO
CH
Explanation:
The correct answer to the question is: CS
Q.
A gas was found to have a density of 0.0847g/L at 17°C and a pressure of 760 torr. The gas must be?
CH4
None of These
N2
He
Explanation:
The correct answer to the question is: He
Q.
Acetophenone is a_____________________?
Aldehyde
Ketone
Ether
Ester
Explanation:
The correct answer to the question is: Ketone
Q.
Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p6 4s23d5
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p5 3d10
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_________________?
Benzene
Cyclohexane
Phenoxide
Benzoic acid
Explanation:
The correct answer to the question is: Benzene
Q.
Numbers of subatomic particles?
1
3
2
more than 3
Explanation:
The correct answer to the question is: more than 3
Q.
The most commonly used bleaching agent is_________?
sodium chlorine
alcohol
carbon dioxide
chlorine
Explanation:
The correct answer to the question is: chlorine
Q.
The easy way of balancing the chemical equation is_________?
None of the above
According to atom’s atomic mass.
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 ____________?
Inductive effect
Electromeric effect
Reasonable
no bond reasonable
Explanation:
The correct answer to the question is: no bond reasonable
Q.
The one mole of _____molecule has the highest number of atoms?
HClO
HCO
HSO
O
Explanation:
The correct answer to the question is: HCO
Q.
On oxidation, an alcohol gives an aldehyde having same number of carbon atoms as in alcohol, the alcohol is____
Tertiary alcohol
None of These
Secondary Alcohol
Primary Alcohol
Explanation:
The correct answer to the question is: Primary Alcohol
Q.
Incomplete oxidation of methane in the limited supply of air forms ?
CO + H2 + C
CO + H2O + C
CO2 and H2O
CH3OH
Explanation:
The correct answer to the question is: CH3OH
Q.
The only non metal exists in liquid state is ___________?
Iodine
Mercury
Bromine
Phosphorus
Explanation:
The correct answer to the question is: Bromine
Q.
A brivalent metal has the equivalent weighr of 12. The molecular weight to its oxide will be_______?
36
32
40
24
Explanation:
The correct answer to the question is: 40
Q.
An acid with unpleasant smell_________________?
butyric acid
propionic acid
acetic acid
formic 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
Inert system
Closed system
Isolated system
Explanation:
The correct answer to the question is: open system
Q.
Formalin is ___________ solution of formaldehyde in water?
60%
20%
40%
10%
Explanation:
The correct answer to the question is: 40%
Q.
The element cesium bears resemblance with________________?
Cr
Both of the above
None 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____________________?
small size
all of the above
high charge density
less electropositivity
Explanation:
The correct answer to the question is: all of the above
Q.
Carbonates of lithium are not stable like that of sodium due to________________?
Low electronegativity
Not known yet
Low charge density
Low electropositivity
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
remains constant
increase
decrease
Explanation:
The correct answer to the question is: increase
Q.
Order of ease of halogenation in alkane is________________?
Cl2>F2>Br2>I2
I2>Cl2>Br2>F2
F2>Cl2>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 _______________?
Soluble in water on heating
Insoluble in water
Insoluble in all solvents
More Soluble in water
Explanation:
The correct answer to the question is: More Soluble in water
Q.
General formula of alkyne is______________?
CnH2n + 2
CnH2n
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
Electrolytic cell
Not
Daniel cell
Explanation:
The correct answer to the question is: Electrolytic cell
Q.
The bond angle between hybrid orbitals in methane CH3 is___________?
180°
105. 7°
109.5°
115.5°
Explanation:
The correct answer to the question is: 109.5°
Q.
Phosphorus is a Greek word and it means_________________?
Fire
Impure
Light bearing
Tetrahedral
Explanation:
The correct answer to the question is: Light bearing
Q.
Alkaline PH scale starts from?
8 to 14
0 to 14
6 to 10
7 to 11
Explanation:
The correct answer to the question is: 8 to 14
Q.
The word Alkali means__________________?
Base
Basic salt
Ashes
Spirit
Explanation:
The correct answer to the question is: Ashes
Q.
At what digit of PH scale PH is neutral?
7
5
10
3
Explanation:
The correct answer to the question is: 7
Q.
Silver nitrate is also known as____________?
Blue Stone
Both A & B
Blue Vitriol
Lunar Caustic
Explanation:
The correct answer to the question is: Lunar Caustic
Q.
Optic fibres are used in :
Endoscopy
X-ray photos
Ultrasound scans
CAT scans
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 ?
Iodine
Bromine
Chlorine
Fluorine
Explanation:
The correct answer to the question is: Fluorine
Q.
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
Phosphine
Phosphorus
Phosphorus pentoxide
Water
Explanation:
The correct answer to the question is: Phosphine
Q.
Which of the following is a soft Coal?
Lignite
Peat
Anthracite
Bituminous
Explanation:
The correct answer to the question is: Bituminous
Q.
The properties which do not depend on mass of the substance are _____________?
Extensive properties
None of These
intensive properties
Colligative 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
increases electrophilic character of carbonyl compound
both a and b
increases the nucleophilic character of reagent
Explanation:
The correct answer to the question is: increases the nucleophilic character of reagent
Q.
Which one of the following is caustic potash?
KOH
NaCl
NaBH4
NaOH
Explanation:
The correct answer to the question is: KOH
Q.
Soil pollution is caused by:_________?
Acid rain
PAN
Aerosol
Ozone
Explanation:
The correct answer to the question is: Acid rain
Q.
Why do we determined the boiling point of a liquid?
None of These
To Check temperature
To check its Acidity and Basicity
To check its Purity and nature
Explanation:
The correct answer to the question is: To check its Purity and nature
Q.
In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?
OH
Oxygen
Hydrogen
Sulphur
Explanation:
The correct answer to the question is: Sulphur
Q.
The halogen which reacts very slowly with halogen is________________?
Fluorine
Bromine
Iodine
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 high molecular weight
Due to its Low molecular weight
Due to Hydrogen bonding
Due to its Acidic nature
Explanation:
The correct answer to the question is: Due to Hydrogen bonding
Q.
Colour in transition metal compounds is attributed to____________?
Absorption of light in UV region
Small sized metal ions
Complete ns sub-shell
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________?
Zinc
Iron
Silver
Sodium
Explanation:
The correct answer to the question is: Silver
Q.
If speed of gas molecules increases by twice on heating. What will be their kinetic energy?
decrease by four times
increases by two times
decreases by two times
increases by four times
Explanation:
The correct answer to the question is: increases by four times
Q.
All the elements in group VIA are ___________________ in nature?
polymeric
all of above
hygroscopic
metals
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 kJ/mol
250.5 Cal/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___________?
specific heat
water equivalent
None of the above
thermal capacity
Explanation:
The correct answer to the question is: thermal capacity
Q.
In unsaturated hydrocarbons electrons favour___________________?
addition reactions
less reactivity
substitution reactions
none
Explanation:
The correct answer to the question is: addition reactions
Q.
The formula of starch is__________________?
C12H22O11
C6H10O5
C6H12O6
(C6H10O5)n
Explanation:
The correct answer to the question is: (C6H10O5)n
Q.
Who is often referred to as the “father of Chemistry”?
Antoine Lavoisier
Isaac Newton
Albert Einstein
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
Na2CrO4
NaHCO3
NaNO3
Explanation:
The correct answer to the question is: Na2CO3
Q.
Column of manometer which faces liquid is __________ ?
Depressed
Compressed
Raised
Remains same
Explanation:
The correct answer to the question is: Depressed
Q.
4moles of Carbon dioxide(CO2) have _____molecules.
12.04 x 10
24.08 x 10
18.06 x 10
6.02 x 10
Explanation:
The correct answer to the question is: 24.08 x 10
Q.
According to Kinetic Molecular Theory gas molecules move in_______path?
Hyperbolic
Straight
Parabolic
Zig-zag
Explanation:
The correct answer to the question is: Straight
Q.
Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
(CH3)3 C – X
(CH3)2 CH – X
(CH3)3 C-CH2 – X
CH3-X
Explanation:
The correct answer to the question is: (CH3)2 CH – X
Q.
Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
75.4pm
75.2pm
75.5pm
75.3pm
Explanation:
The correct answer to the question is: 75.4pm
Q.
O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
Ethylene oxide
HCHO
Ethyl alcohol
Ethylene glycol
Explanation:
The correct answer to the question is: HCHO
Q.
The bond energy of Hydrogen molecule is__________?
106Kcal/mol
110Kcal/mol
104Kcal/mol
150KJcal/mol
Explanation:
The correct answer to the question is: 104Kcal/mol
Q.
The following alcohol does not undergo oxidation is _____________?
2° alcohol
1° alcohol
3° alcohol
0° alcohol
Explanation:
The correct answer to the question is: 3° alcohol
Q.
Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
The presence of Hydrogen
The presence of Oxygen
The presence of excessive Oxygen
The absence of Oxygen
Explanation:
The correct answer to the question is: The absence of Oxygen
Q.
SN2 reaction can be best carried out with__________________?
secondary alkyl halide
primary alkyl halide
tertiary alkyl halide
all
Explanation:
The correct answer to the question is: primary alkyl halide
Q.
Magnesium metal does not burn in the vessel containing_______________?
O2
N2
Ne
N2 and O2
Explanation:
The correct answer to the question is: Ne
Q.
Which is fused cyclic aromatic compound _____________________?
diphenyl methane
diphenyl amine
naphthalene
biphenyl
Explanation:
The correct answer to the question is: naphthalene
Q.
Potassium Permanganate is used for purifying drinking water, because_________?
It is an oxidising agent.
It is a sterilising agent.
It is a reducing agent.
It dissolves the impurities of water.
Explanation:
The correct answer to the question is: It is an oxidising agent.
Q.
Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
Halides
Aldehydes
Ketones
Alkali metals
Explanation:
The correct answer to the question is: Halides
Q.
Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
dihydric alcohol
secondary alcohol
primary alcohol
tertiary alcohol
Explanation:
The correct answer to the question is: tertiary alcohol
Q.
The metallurgical process in which a metal is obtained in a fused state is called__________?
smelting
froth floatation
calcinations
roasting
Explanation:
The correct answer to the question is: smelting
Q.
The gas which cannot be dried by conc. H2SO4 ?
SO2
C2H4
H2S
CO2
Explanation:
The correct answer to the question is: H2S
Q.
Ce58 is a member of__________?
P-block
f-block
S-block
d-block
Explanation:
The correct answer to the question is: f-block
Q.
Fluorine can react with_________________?
Xe
All of the above
Rn
Kr
Explanation:
The correct answer to the question is: All of the above
Q.
FeSO4 forms brown ring with________________?
NO2
N2O3
N2O
NO
Explanation:
The correct answer to the question is: NO
Q.
The Branch of chemistry dealing with brewing and distilling is called _______ ?
Zymurgy
Zygology
Zymology
Zootaxy
Explanation:
The correct answer to the question is: Zymurgy
Q.
In diaphragm cell hydrogen is discharged by the reduction of__________________?
NaCl
HCI
Water
Na+
Explanation:
The correct answer to the question is: Water
Q.
The rays that have negative charge are ___________?
Cathode Rays
Anode Rays
Gamma Rays
Canal Rays
Explanation:
The correct answer to the question is: Cathode Rays
Q.
What is the formula of Silver nitrate?
AgNO2
AgNO3
AgNO4
AgNO
Explanation:
The correct answer to the question is: AgNO3
Q.
Coal gas is made up of mostly ________ & _________?
Hydrogen & Water
Hydrogen & Carbon dioxide
Hydrogen & Methane
Carbonmonoxdide & water
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+4
Cu+1
Cu+3
Cu+2
Explanation:
The correct answer to the question is: Cu+1
Q.
The marsh gas is ___________?
Propane
Butane
Methane
Ethane
Explanation:
The correct answer to the question is: Methane
Q.
The maximum oxidation shown by manages is_________?
+2
+5
+7
+4
Explanation:
The correct answer to the question is: +7
Q.
The oxides of beryllium BeO is_______________?
Neutral
Basic
Acidic
Amphoteric
Explanation:
The correct answer to the question is: Amphoteric
Q.
When one hydrogen atom of alkane is removed then it is called________________?
aldehyde
alkyl
saturated hydrocarbon
alkene
Explanation:
The correct answer to the question is: alkyl
Q.
Which of the following is a neutral particle ?
Proton
Alpha particle
Neutron
Electron
Explanation:
The correct answer to the question is: Neutron
Q.
Boron in soil has been considered micronutrient for_________________?
Proper growth of plants
All
Soil porocity
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 ________________?
I2
Br2
F2
Cl2
Explanation:
The correct answer to the question is: Cl2
Q.
Benzene gives mainly_________?
Halogenation
All of these
Substitution reactions
Addition reaction
Explanation:
The correct answer to the question is: Substitution reactions
Q.
In which compound nitrogen has maximum oxidation state____________________?
NO2
HNO3
N2O
HNO2
Explanation:
The correct answer to the question is: HNO3
Q.
In Bosch Process, that is used to separate the Hydrogen gas from water Gas, the catalyst is used ______?
FeO
Cr²O³
Pt
Both B&C
Explanation:
The correct answer to the question is: Both B&C
Q.
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
ClO2
Cl2O6
Cl2O7
Cl2O
Explanation:
The correct answer to the question is: ClO2
Q.
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
it has a 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 ____________?
Thermionic emission
Nuclear fusion
Photoelectric emission
Nuclear fission
Explanation:
The correct answer to the question is: Nuclear fusion
Q.
The metal which is used in thermite process because of its activity is____________________?
aluminium
iron
zinc
copper
Explanation:
The correct answer to the question is: aluminium
Q.
LiAlH4 converts Acetaldehyde into ___________?
Acetic acid
Ethyl alcohol
Methyl alcohol
Methane
Explanation:
The correct answer to the question is: Ethyl alcohol
Q.
The solution remaining after the formation of crystals is called ___________________?
Mother liquor
Residue
Dilute solution
both A & B
Explanation:
The correct answer to the question is: Mother liquor
Q.
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
a dehydrating agent
an oxidizing agent
an acid
as sulphonating agent
Explanation:
The correct answer to the question is: a dehydrating agent
Q.
Which one is a pure carbon?
None of These
Coke
Coal Tar
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___________?
Dalton’s law
Raoult’s law
Henry’s law
Gay Lussac’s law
Explanation:
The correct answer to the question is: Henry’s law
Q.
When phenol is heated with concentrated nitric acid the product is________________?
o-nitrophenol
Picric acid
p-nitrophenol
1 3 5 -trinitro benzene
Explanation:
The correct answer to the question is: Picric acid
Q.
The systematic name of sucrose is_______?
1-β- D- glucofuranosyl-2-α- D- fructofuranoside
11-α-D-glucopyranosyl-2-β-D-fructofuranoside
1-α-D- glucopyranosyl-2-β-D-fructopyranoside
1-α-D- glucofuranosyl-2-α-D- fructopyranoside
Explanation:
The correct answer to the question is: 1-α-D- glucopyranosyl-2-β-D-fructopyranoside
Q.
Iodoform test can be used to distinguish between_________________?
acetone and diethyl ketone
acetaldehyde and methanal
ethanol and methanol
all of the above
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?
3
4
5
2
Explanation:
The correct answer to the question is: 3
Q.
Which one does not give borax bead test_________________?
Cobalt sulphate
Copper sulphate
Barium sulphate
Nickel sulphate
Explanation:
The correct answer to the question is: Barium sulphate
Q.
Removal of halogen and hydrogen atom is_________________?
dehalogenation
dehydrohalogenation
halogenation
hydrohalogenation
Explanation:
The correct answer to the question is: dehydrohalogenation
Q.
Cathode is a metalic plate where__________ takes place.
Redox
Reduction
Substitution
Oxidation
Explanation:
The correct answer to the question is: Reduction
Q.
In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
None of them
Sodium
H²O
Flouride
Explanation:
The correct answer to the question is: H²O
Q.
Borax is a white crystalline solid and it is_________________?
Soluble only in organic solvents
Insoluble in water
More soluble in hot water
More soluble in cold water
Explanation:
The correct answer to the question is: More soluble in hot water
Q.
Which allotropic form of phosphorous is the most stable ?
black
Violet
White
red
Explanation:
The correct answer to the question is: black
Q.
Preparation of vegetable ghee involves_________________?
hydration
halogenation
hydroxylation
hydrogenation
Explanation:
The correct answer to the question is: hydrogenation
Q.
which Compound Destroy The OZONE ?
CFCs
BOTH A & B
CH3COOH
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
Lucas test
Tollen’s test
Benedict’s test
Explanation:
The correct answer to the question is: Lucas test
Q.
Which of the following is the use of Silver nitrate?
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 ?
Boron and Beryllium
Sodium and Lithium
Lithium and magnesium
Lithium and beryllium
Explanation:
The correct answer to the question is: Lithium and magnesium
Q.
When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________?
Necleophilic substitution
Electrophilic addition
Electrophilic 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?
hydrogen ion
hydride ion
oxide ion
methoxide ion
Explanation:
The correct answer to the question is: hydride ion
Q.
Photographic plates are coated with a thin film of _________________?
AgCl
AgNO3
AgBr
AgI
Explanation:
The correct answer to the question is: AgBr
Q.
One Water molecule can form maximum ______hydrogen bonds.
2
None
4
3
Explanation:
The correct answer to the question is: 4
Q.
Boyle’s Law was given by the Robert Boyle in_______?
1662
1663
1661
1660
Explanation:
The correct answer to the question is: 1662
Q.
The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________?
Diastase-zymase-maltase
Zymase-maltase-diastase
Diastase-maltase-zymase
Maltase-diastase-zymase
Explanation:
The correct answer to the question is: Diastase-maltase-zymase
Q.
The chemical composition of cinnabar is__________________?
ZnS
HgS
PbS
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-CCH (1-Butyne)
CH-CCH(1-Propyne)
CH=CH
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-Al alloy
Ni-Mg alloy
Ni-Cu alloy
Ni-Fe alloy
Explanation:
The correct answer to the question is: Ni-Al alloy
Q.
The practical problem in Hydrogen production is it:______________?
Valency
Size
Chemical property
Weight
Explanation:
The correct answer to the question is: Weight
Q.
Which of the following shows electrical conduction_____?
Graphite
Sodium
Diamond
Potassium
Explanation:
The correct answer to the question is: Graphite
Q.
Chlorination of toluene in the presence of sublight produces_________________?
Benzyl chloride
p – chlorotoluene
benzoic acid
o – chlorotoluene
Explanation:
The correct answer to the question is: Benzyl chloride
Q.
Octane number is 0 value for ___________?
n-heptane
n-hexane
iso-octane
iso-heptane
Explanation:
The correct answer to the question is: n-heptane
Q.
Which one of the following substances conducts electricity by the movement of ions ?
Copper
Molten sodium chloride
Graphite
Mercury
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
pressure and temperature
heat and volume
Explanation:
The correct answer to the question is: heat and work
Q.
The main buffer system of the human blood is____________?
CHCOOH – CHCOO
HCO – HCO
NHCONH – NHCONH
HCO – CO
Explanation:
The correct answer to the question is: HCO – HCO
Q.
The acetylene molecule contains:___________?
5 sigma bonds
2 sigma and 3 pi 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:__________?
Nitrates
Fluorides
Arsenic
Mercury
Explanation:
The correct answer to the question is: Arsenic
Q.
Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde
CH
CH
CH
CH
Explanation:
The correct answer to the question is: CH
Q.
Sabatier Senderns reaction involve _____________ in presence of Ni?
alkene & O2
alkene & N2
Aalkene & H2
alkyne & Cl2
Explanation:
The correct answer to the question is: Aalkene & H2
Q.
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
6
4
2
1
Explanation:
The correct answer to the question is: 4
Q.
Surface Tension ________with increasing the surface area of liquid?
Remains Same
Increases
Decreases
None
Explanation:
The correct answer to the question is: Decreases
Q.
Which of the following reagents will react with both aldehydes and ketones ?
Benedicts reagent
Grignard reagent
Tollens reagent
Fehlings reagent
Explanation:
The correct answer to the question is: Grignard reagent
Q.
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
this acid was first obtained by the distillation of ants
this acid, in ancient times, was used to eliminate ant-hills
ants are attracted by the odour of this acid
this corrosive acid is secreted by ants to drive away their enemies
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____________________?
Na2O and KOH
CaO and NaOH
CaO and KOH
NaOH and Na2O
Explanation:
The correct answer to the question is: CaO and NaOH
Q.
Ethanol can be converted into ethanoic acid by_________________?
Oxidation
Hydrogenation
Hydration
Fermentation
Explanation:
The correct answer to the question is: Oxidation
Q.
The most useful dye for those fabric which can form hydrogen bonds is:_____________?
Vat dye
Mordent dye
Direct dye
Acid dye
Explanation:
The correct answer to the question is: Direct dye
Q.
Sodium is not observed in +2 oxidation state because of its__________________?
high second ioniation potential
high ionic radius
high electronegativity
high first ionization potential
Explanation:
The correct answer to the question is: high second ioniation potential
Q.
Which one of the following is the weakest acid in water__________________?
HBr
HCI
HF
HI
Explanation:
The correct answer to the question is: HF
Q.
Which of the following sulphates is not soluble in water ?
Sodium sulphate
Zinc sulphate
Barium 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
78% Fe
75% Fe
74% Fe
Explanation:
The correct answer to the question is: 78% Fe
Q.
The earth absorb radiation in Visible range but emit radiation at the same rate in the:
Ultra voilet
All of these
Gamma rays
Infrared
Explanation:
The correct answer to the question is: Infrared
Q.
Product of Nucleophilic Substitution Uni Molecular reaction is in case of chiral substrate?
Inversion
Retention
Recemic Mixture
Stereospecific
Explanation:
The correct answer to the question is: Recemic Mixture
Q.
The Electronegativity of Hydrogen is _____.
3.1
2.8
2.2
1.8
Explanation:
The correct answer to the question is: 2.2
Q.
The valency of carbon Atom is __________ ?
2
3
1
4
Explanation:
The correct answer to the question is: 4
Q.
Elements which emit natural radioactivity are known as __________ ?
Radio elements
Radioactive elements
Nuclear elements
Active elements
Explanation:
The correct answer to the question is: Radioactive elements
Q.
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
0.115
0.015
0.900
0.215
Explanation:
The correct answer to the question is: 0.115
Q.
The typical reactions of aldehyde is _____________?
Nucleophilic substitution
Electrophilic addition
Nucleophilic elimination
Nucleophilic addition
Explanation:
The correct answer to the question is: Nucleophilic addition
Q.
Which among the following is not a property of Ionic bond _________?
Transfer of electrons
Sharing of electrons
Losing of electrons
Gain of electrons
Explanation:
The correct answer to the question is: Sharing of electrons
Q.
One fathom is equal to:__________?
60 feet
100 cm
6 feet
6 meters
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 – cation
none of these
a cation
an anion
Explanation:
The correct answer to the question is: a cation
Q.
Which compound shows hydrogen bonding ?
CH3OCH3
C2H5Cl
C2H5OH
C2H6
Explanation:
The correct answer to the question is: C2H5OH
Q.
Which of the following alloys contain(s) Cu and Zn?
Type metal
Brass
Bronze
Gun-metal
Explanation:
The correct answer to the question is: Brass
Q.
Noble gases are so called zero group because they have:_________?
Zero Electron Affinity
Both A and B
Zero Valency
Zero Electronegativity
Explanation:
The correct answer to the question is: Both A and B
Q.
Magnetic quantum number specifies___________?
Orientation of orbitals
Shape of orbitals
All of the above
Size of orbitals
Explanation:
The correct answer to the question is: Orientation of orbitals
Q.
2-Butyne contains:______________?
both sp and sp hybridised carbon atoms
sp hybridised carbon atoms only
sp hybridised carbon atoms only
both sp and sp hybridised carbon atoms
Explanation:
The correct answer to the question is: both sp and sp hybridised carbon atoms
Q.
Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
Tartaric acid
Propanoic acid
Lactic acid
Valeric acid
Explanation:
The correct answer to the question is: Lactic acid
Q.
How many isomeric aldoses are possible for the molecular formula C6H12O6?
16
4
2
7
Explanation:
The correct answer to the question is: 16
Q.
Lead battery is secondary battery the paste used in it is______________?
AOT
Zinc chloride
Magnese dioxide
Ammonium chloride
Explanation:
The correct answer to the question is: AOT
Q.
Identify the Lucas reagent among the following
Dil. HCl & hydrated ZnCl
Conc. HNO & Anhydrous MgCl
Conc. HNO & Anhydrous 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
6
8
5
Explanation:
The correct answer to the question is: 5
Q.
The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________?
P-Block
d-Block
f-Block
S-Block
Explanation:
The correct answer to the question is: f-Block
Q.
Which compound will readily undergo sulphonation ?
Chlorobenzene
Nitro benzene
Benzene
Toluene
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________?
CH2
CHO2
C2H2O4
CH2O
Explanation:
The correct answer to the question is: CHO2
Q.
The Ionization energy of Hydrogen is __________?
10.54ev
13.6ev
17.56ev
12.54ev
Explanation:
The correct answer to the question is: 13.6ev
Q.
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
accetaldehyde
formaldehyde
benzaldehyde
acetone
Explanation:
The correct answer to the question is: acetone
Q.
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
Negative particle
Alpha particle
Beta particle
Gamma particle
Explanation:
The correct answer to the question is: Alpha particle
Q.
When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?
Bromine
Chlorine
Iodine
Fluorine
Explanation:
The correct answer to the question is: Iodine
Q.
The molecules of which gas have highest speed?
O at 0C
CH at 300 K
N at 1,027C
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 high nuclear charge
it has small size
all of the above
Explanation:
The correct answer to the question is: all of the above
Q.
Which of the following will not give addition reaction with NaHSO3________________?
CH3-CH2-CHO
HCHO
None of the above
CH3CHO
Explanation:
The correct answer to the question is: CH3-CH2-CHO
Q.
The common oxidation state of lanthanides is_________?
+1
+4
+2
+3
Explanation:
The correct answer to the question is: +3
Q.
The decomposition of nitroglycerine is an example of:
Enzyme catalytic reaction
induced catalysis
Autocatalytic reaction
Self catalytic reaction
Explanation:
The correct answer to the question is: Autocatalytic reaction
Q.
Which of the following will give phosphoric acid one reaction with water_________________?
All of the above
P2O3
PCI5
P2O5
Explanation:
The correct answer to the question is: All of the above
Q.
Which one of the following serve as aquatic solar fuel cell:
Virus
Fungi
Bacteria
Algae
Explanation:
The correct answer to the question is: Algae
Q.
The Bond Energy of H-F is________?
562kJ/mol
None
281kJ/mol
456kJ/mol
Explanation:
The correct answer to the question is: 562kJ/mol
Q.
Barometer was invented by _______?
Huygen
Newton
Pascal
Torricelli
Explanation:
The correct answer to the question is: Torricelli
Q.
Which of the following do not give aldol condensation reactions ?
diemthyl ketone
formaldehyde
propionaldehyde
acetaldehyde
Explanation:
The correct answer to the question is: formaldehyde
Q.
Electromeric effect is ____________?
Permanent effect
Operate due to electronegativity difference
None of the above
temporary effect
Explanation:
The correct answer to the question is: temporary effect
Q.
In electrolysis of NaCl the product obtained at cathode is_______.
Remain at the bottom of the cell
Chloride ions
Both
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
Dipolar character of amino acids
Acidic 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.No3
FeSO4.N2o
FeSO4.No2
FeSO4.No
Explanation:
The correct answer to the question is: FeSO4.No
Q.
If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________?
R/2
R/4
2 R
3R/4
Explanation:
The correct answer to the question is: 3R/4
Q.
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Sodium
Potassium
Rubidium
Lithium
Explanation:
The correct answer to the question is: Lithium
Q.
Which of the following is most soluble on water?
MgSO4
CaSO4
SrSO4
BaSO4
Explanation:
The correct answer to the question is: MgSO4
Q.
Benzene is heated in air with V2O5 at 450°C it undergoes________________?
Oxidation reaction
Elimination reaction
Substitution reaction
Addition reaction
Explanation:
The correct answer to the question is: Oxidation reaction
Q.
First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
They have smaller atomic sizes
They are more reactive
They have greater atomic radii
All
Explanation:
The correct answer to the question is: They have smaller atomic sizes
Q.
Hydrogen bonding is present in __________?
All of these
Water
Phenol
Ethyl Alcohol
Explanation:
The correct answer to the question is: All of these
Q.
Chlorine Cl when attached to benzene has________?
-I and -R effect
+1 and -R effect
+I and +R effect
-1 and +R effect
Explanation:
The correct answer to the question is: -1 and +R effect
Q.
Compound containing two halogen atoms on two adjacent carbon atoms are called as ___________?
Vicinal dihalides
Glycols
Diols
Geminal dihalides
Explanation:
The correct answer to the question is: Vicinal dihalides
Q.
The colour of chlorine gas is_______________?
reddish brown
pale yellow
freenish yellow
grayish black
Explanation:
The correct answer to the question is: freenish yellow