JEE Main 2022 (Online) 25th June Evening Shift
JEE Main / 30 questions
2026Sat, Jun 25, 2022 9:30 AM30 PYQs
1Alcohols Phenols And Ethers
In the given reaction
'A' can be
'A' can be
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2Alcohols Phenols And Ethers
The major product formed in the following reaction, is
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3Aldehydes Ketones And Carboxylic Acids
Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?
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4Basics Of Organic Chemistry
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : A mixture contains benzoic acid and napthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason R ...
Assertion A : A mixture contains benzoic acid and napthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason R ...
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5Biomolecules
How many of the given compounds will give a positive Biuret test ____________ ?
Glycine, Glycylalanine, Tripeptide, Biuret
Glycine, Glycylalanine, Tripeptide, Biuret
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6Chemical Bonding And Molecular Structure
Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ____________.
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7Chemical Kinetics And Nuclear Chemistry
At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa was 340 s. When the pressure was 27.8 kPa, the half life was found to be 170 s. The order of the reaction is ____________. [integer answer...
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8Chemistry In Everyday Life
Match List I with List II
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9Chemistry In Everyday Life
An antiseptic dettol is a mixture of two compounds 'A' and 'B' where A has 6\(\pi\) electrons and B has 2\(\pi\) electrons. What is 'B'?
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10Compounds Containing Nitrogen
Amongst the following, the major product of the given chemical reaction is
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11Compounds Containing Nitrogen
Which of the following ketone will NOT give enamine on treatment with secondary amines? [where t-Bu is \(-\)C(CH3)3]
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12Coordination Compounds
Amongst FeCl3.3H2O, K3[Fe(CN)6] and [Co(NH3)6]Cl3, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is ____________ B.M. [nearest integer]
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13D And F Block Elements
The metal ion (in gaseous state) with lowest spin-only magnetic moment value is :
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14Electrochemistry
The correct order of reduction potentials of the following pairs is
A. Cl2/Cl\(-\)
B. I2/I\(-\)
C. Ag+/Ag
D. Na+/Na
E. Li+/Li
Choose the correct answer from the options given below.
A. Cl2/Cl\(-\)
B. I2/I\(-\)
C. Ag+/Ag
D. Na+/Na
E. Li+/Li
Choose the correct answer from the options given below.
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15Electrochemistry
A solution of Fe2(SO4)3 is electrolyzed for 'x' min with a current of 1.5 A to deposit 0.3482 g of Fe. The value of x is ___________. [nearest integer]
Given : 1 F = 96500 C mol\(-\)1
Atomic mass of Fe = 56 g mol\(-\)1
Given : 1 F = 96500 C mol\(-\)1
Atomic mass of Fe = 56 g mol\(-\)1
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16Environmental Chemistry
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Polluted water may have a value of BOD of the order of 17 ppm.
Reason R : BOD is a measure of oxygen required to oxidise bo...
Assertion A : Polluted water may have a value of BOD of the order of 17 ppm.
Reason R : BOD is a measure of oxygen required to oxidise bo...
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17Gaseous State
A rigid nitrogen tank stored inside a laboratory has a pressure of 30 atm at 06:00 am when the temperature is 27\(^\circ\)C. At 03:00 pm, when the temperature is 45\(^\circ\), the pressure in the tank will be _________ atm. [nearest integer...
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18Ionic Equilibrium
The Ksp for bismuth sulphide (Bi2S3) is 1.08 \(\times\) 10\(-\)73. The solubility of Bi2S3 in mol L\(-\)1 at 298 K is :
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19Ionic Equilibrium
Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : The amphoteric nature of water is explained by using Lewis acid/base concept.
Reason R : Water acts as an acid with NH3 and ...
Assertion A : The amphoteric nature of water is explained by using Lewis acid/base concept.
Reason R : Water acts as an acid with NH3 and ...
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20Isolation Of Elements
Given below are two statements.
Statement I : During electrolytic refining, blister copper deposits precious metals.
Statement II : In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode.
In...
Statement I : During electrolytic refining, blister copper deposits precious metals.
Statement II : In the process of obtaining pure copper by electrolysis method, copper blister is used to make the anode.
In...
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21P Block Elements
The number of bridged oxygen atoms present in compound B formed from the following reactions is
Pb(NO3)2 \(\buildrel {673\,K} \over \longrightarrow\) A + PbO + O2
A \(\buildrel {Dimerise} \over \longrightarrow\) B
Pb(NO3)2 \(\buildrel {673\,K} \over \longrightarrow\) A + PbO + O2
A \(\buildrel {Dimerise} \over \longrightarrow\) B
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22P Block Elements
Consider the following reactions:
PCl3 + H2O \(\to\) A + HCl
A + H2O \(\to\) B + HCl
The number of ionisable protons present in the product B is _______________.
PCl3 + H2O \(\to\) A + HCl
A + H2O \(\to\) B + HCl
The number of ionisable protons present in the product B is _______________.
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23Periodic Table And Periodicity
The correct order of electron gain enthalpies of Cl, F, Te and Po is
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24Polymers
The Novolac polymer has mass of 963 g. The number of monomer units present in it are
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25Redox Reactions
The neutralization occurs when 10 mL of 0.1M acid 'A' is allowed to react with 30 mL of 0.05 M base M(OH)2. The basicity of the acid 'A' is __________.
[M is a metal]
[M is a metal]
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26Salt Analysis
During halogen test, sodium fusion extract is boiled with concentrated HNO3 to
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27Solutions
Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2\(^\circ\)C. The percentage association of solute A in water, is :
[Given : Molar mass of A = 93 g mol\(-\)1. Molal ...
[Given : Molar mass of A = 93 g mol\(-\)1. Molal ...
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28Some Basic Concepts Of Chemistry
A protein 'A' contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein 'A' is __________ \(\times\) 103 g mol\(-\)1 [nearest integer]
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29Structure Of Atom
The minimum energy that must be possessed by photons in order to produce the photoelectric effect with platinum metal is :
[Given : The threshold frequency of platinum is 1.3 \(\times\) 1015 s\(-\)1 and h = 6.6 \(\times\) 10\(-\)34 J s.]
[Given : The threshold frequency of platinum is 1.3 \(\times\) 1015 s\(-\)1 and h = 6.6 \(\times\) 10\(-\)34 J s.]
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30Thermodynamics
At 25\(^\circ\)C and 1 atm pressure, the enthalpy of combustion of benzene (I) and acetylene (g) are \(-\) 3268 kJ mol\(-\)1 and \(-\)1300 kJ mol\(-\)1, respectively. The change in enthalpy for the reaction 3 C2H2(g) \(\to\) C6H6 (I), is :
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