PYQ Vault
EbooksTutor

Hydrocarbons

JEE Mains Chemistry. Try each one first, then open its answer.

Top 10 JEE Mains PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 11 times: 2021 Paper 2, 2021 Paper 5, 2021 Paper 7, 2021 Paper 19, 28 Jun 2022, 26 Jul 2022, 27 Jul 2022, 27 Jan 2024, 8 Apr 2024, 2 Apr 2025, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 11 of this type

    39
    The total number of aromatic compounds/species from the following is:

    Tap an option to check your answer.

  2. Question 2

    This type asked 7 times: 28 Jul 2022, 11 Apr 2023, 15 Apr 2023, 31 Jan 2024, 1 Feb 2024, 6 Apr 2024, 23 Jan 2026 S1. This one: 23 Jan 2026 S1 See all 7 of this type

    37
    Consider the following compounds Arrange these compounds in the increasing order of reactivity with nitrating mixture.

    Tap an option to check your answer.

  3. Question 3

    This type asked 6 times: 29 Jan 2023, 31 Jan 2023, 8 Apr 2023, 23 Jan 2025, 3 Apr 2025, 4 Apr 2026 S1. This one: 4 Apr 2026 S1 See all 6 of this type

    39
    An alkene (X) on ozonolytic followed by reduction gives following products. The alkene ( X ) is :

    Tap an option to check your answer.

  4. Question 4

    This type asked 4 times: 25 Jul 2022, 24 Jan 2023, 31 Jan 2024, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 4 of this type

    47
    Consider the isomers of hydrocarbon with molecular formula C5H10C_{5}H_{10}. These isomers do not decolourise KMnO4{KMnO}_{4} solution. These isomers are subjected to chlorination with chlorine in presence of light to give monochloro compounds. The total number of monochloro compounds (structural isomers only) formed is ____\_\_\_\_ .

  5. Question 5

    This type asked 4 times: 31 Jan 2023, 1 Feb 2023, 1 Feb 2024, 23 Jan 2026 S1. This one: 23 Jan 2026 S1 See all 4 of this type

    35
    But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd/CPd/C and (ii) Na/Na/ liq. NH3NH_{3} to give the products X and Y respectively. Identify the incorrect statements. (A) XX and YY are stereoisomers. (B) Dipole moment of X is zero (C) Boiling point of X is higher than Y . (D) X and Y react with O3/Zn+H2OO_{3}/Zn + H_{2}O to give different products. Choose the correct answer from the options given below :

    Tap an option to check your answer.

  6. Question 6

    This type asked 3 times: 24 Jan 2026 S1, 28 Jan 2026 S1, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 3 of this type

    38
    Given below are two statements : Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is CH3−>CH3−CH2−>(CH3)2CH−>(CH3)3C−{CH}_{3}^{-} > {CH}_{3} - {CH}_{2}^{-} > \left( {CH}_{3} \right)_{2}{CH}^{-} > \left( {CH}_{3} \right)_{3}C^{-}. Statement II : Allyl and benzyl carbanions are more stabilised by inductive effect and not by resonance effect. In the light of the above statements choose the correct answer from the options given below

    Tap an option to check your answer.

  7. Question 7

    This type asked 3 times: 28 Jul 2022, 27 Jan 2024, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 3 of this type

    40
    Ph−CH=CH2Ph - CH =CH_{2} →(PhCOO)2HBr Product\underset{HBr\ }{\overset{(PhCOO)_{2}}{\rightarrow}}Product Consider the above reaction (A) The reaction proceeds through a more stable radical intermediate. (B) The role of peroxide is to generate H˙\dot{H} (Hydrogen radical). (C) During this reaction, benzene is formed as a by-product. (D) 1-Bromo-2-phenylethane is formed as the minor product. (E) The same reaction in absence of peroxide proceeds via carbocation intermediate. Identify the correct statements. Choose the correct answer from the options given below:

    Tap an option to check your answer.

  8. Question 8

    This type asked 3 times: 2021 Paper 23, 27 Jan 2024, 24 Jan 2026 S2. This one: 24 Jan 2026 S2 See all 3 of this type

    45
    Given below are two statements : Statement I : There are several conformers for n- butane. Out of those conformers, (X) is the least stable and (Y) is the most stable conformer (both shown below). Statement II : As the dihedral angle increases, torsional strain decreases from (X) to (Y). In the light of the above statements, choose the correct answer from the options given below :

    Tap an option to check your answer.

  9. Question 9

    This type asked 3 times: 26 Jun 2022, 29 Jan 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 3 of this type

    36
    Given below are two statements : Statement I : Benzene is nitrated to give nitrobenzene, which on further treatment with CH3COCl/AlCl3{CH}_{3}COCl/{AlCl}_{3} will give m-nitroacetophenone (shown below). Statement II : NO2{NO}_{2} group is a mm-directing, and deactivating group. In the light of the above statements, choose the most appropriate answer from the options given below.

    Tap an option to check your answer.

  10. Question 10

    This type asked 3 times: 12 Apr 2023, 23 Jan 2025, 7 Apr 2025. This one: 7 Apr 2025 See all 3 of this type

    115
    The number of optically active products obtained from the complete ozonolysis of the given compound is :

    Tap an option to check your answer.