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Organic Chemistry - Some Basic Principles and Techniques

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 15 times: 2021 Paper 22, 28 Jun 2022, 8 Apr 2023, 27 Jan 2024, 29 Jan 2024, 30 Jan 2024, 31 Jan 2024, 5 Apr 2024, 8 Apr 2024, 22 Jan 2025, 29 Jan 2025, 3 Apr 2025, 4 Apr 2025, 7 Apr 2025, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 15 of this type

    33
    The IUPAC name of the following compound is :

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  2. Question 2

    This type asked 10 times: 26 Jun 2022, 28 Jun 2022, 28 Jul 2022, 31 Jan 2023, 8 Apr 2023, 13 Apr 2023, 3 Apr 2025, 7 Apr 2025, 24 Jan 2026 S2, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 10 of this type

    37
    Complete combustion of X g of an organic compound gave 0.25 g of CO2CO_{2} and 0.12 g of H2OH_{2}O. If the % of carbon is 25%25\% and of hydrogen is 4.89%4.89\%, then X=X = ____\_\_\_\_ ×10−3 g\times10^{- 3}\text{ }g. (Nearest integer) (Molar mass of C,HC,H and O are 12, 1 and 16 g mol−116\text{ }g{\text{ }mol}^{- 1} respectively )

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  3. Question 3

    This type asked 9 times: 2021 Paper 20, 27 Jun 2022, 28 Jun 2022, 27 Jul 2022, 13 Apr 2023, 22 Jan 2025, 24 Jan 2025, 22 Jan 2026 S1, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 9 of this type

    40
    In Carius method 0.2425 g of an organic compounds gave 0.5253 g silver chloride. The percentage of chlorine in the organic compound is

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  4. Question 4

    This type asked 8 times: 2021 Paper 9, 25 Jan 2023, 5 Apr 2024, 6 Apr 2024, 28 Jan 2025, 21 Jan 2026 S1, 21 Jan 2026 S2, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 8 of this type

    39
    Given below are two statements : Statement-I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers. Statement-II : 2, 2, 6, 6-tetramethylcyclohexanone exhibits keto-enol tautomerism. In the light of the above statements, choose the correct answer from the options given below.

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  5. Question 5

    This type asked 8 times: 2021 Paper 19, 25 Jan 2023, 23 Jan 2025, 29 Jan 2025, 21 Jan 2026 S1, 28 Jan 2026 S2, 4 Apr 2026 S2, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 8 of this type

    47
    In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of BaSO4{BaSO}_{4}. The percentage of sulphur in the substance is ____\_\_\_\_ %. (Given molar mass in gmol−1 S:32,BaSO4:231g{mol}^{- 1}\text{ }S:32,{BaSO}_{4}:231 )

  6. Question 6

    This type asked 8 times: 2021 Paper 16, 29 Jun 2022, 30 Jan 2023, 10 Apr 2023, 30 Jan 2024, 22 Jan 2025, 24 Jan 2025, 28 Jan 2025. This one: 28 Jan 2025 See all 8 of this type

    42
    The correct order of stability of following carbocations is :

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  7. Question 7

    This type asked 7 times: 27 Jul 2022, 30 Jan 2023, 31 Jan 2023, 31 Jan 2024, 2 Apr 2025, 4 Apr 2025, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 7 of this type

    37
    Match List-I with List-II.
    List-I (Purification technique)List-II (Used to separate)
    (A)Simple distillation(I)Steam volatile compound
    (B)Fractional distillation(II)Two liquids with large difference in boiling points
    (C)Steam distillation(III)Liquid decomposing at its boiling point
    (D)Distillation under reduced pressure(IV)Two liquids with close boiling points
    Choose the correct answer from the options given below :

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  8. Question 8

    This type asked 7 times: 14 Jun 2022, 28 Jul 2022, 2 Apr 2025, 3 Apr 2025, 4 Apr 2025, 7 Apr 2025, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 7 of this type

    49
    In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at 300 K and 715 mm pressure. The percentage of nitrogen in the organic compound is ____\_\_\_\_ % (Aqueous tension at 300 K is 15 mm ).

  9. Question 9

    This type asked 7 times: 2021 Paper 19, 27 Jun 2022, 1 Feb 2024, 8 Apr 2024, 9 Apr 2024, 22 Jan 2025, 24 Jan 2025. This one: 24 Jan 2025 See all 7 of this type

    122
    The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ____\_\_\_\_ .

  10. Question 10

    This type asked 6 times: 28 Jul 2022, 15 Apr 2023, 29 Jan 2024, 31 Jan 2024, 4 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 6 of this type

    103
    Given below are two statements : Statement (I) : In partition chromatography, stationary phase is thin film of liquid present in the inert support. Statement (II) : In paper chromatography, the material of paper acts as a stationary phase. In the light of the above statements, choose the correct answer from the options given below :

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