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Aldehydes, Ketones and Carboxylic Acids

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 7 times: 26 Jun 2022, 27 Jul 2022, 30 Jan 2024, 31 Jan 2024, 22 Jan 2025, 24 Jan 2025, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 7 of this type

    32
    Match List-I with List-II.
    List-I ReagentsList-II Reaction Name (Involving aldehydes)
    (A)H2, Pd−BaSO4H_{2},\ Pd - {BaSO}_{4}(I)Etard Reaction
    (B)SnCl2, HCl{SnCl}_{2},\ HCl(II)Rosenmund Reduction
    (C)CrO2Cl2, CS2{CrO}_{2}{Cl}_{2},\ {CS}_{2}(III)Gattermann-Koch Reaction
    (D)CO, HClCO,\ HCl, anhyd. AlCl3{AlCl}_{3}(IV)Stephen Reaction
    Choose the correct answer from the options given below:

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  2. Question 2

    This type asked 6 times: 31 Jan 2023, 6 Apr 2023, 9 Apr 2024, 3 Apr 2025, 4 Apr 2025, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 6 of this type

    37
    Which of the following statements are TRUE about Haloform reaction? (A) Sodium hypochlorite reacts with KI to give KOI. (B) KOI is a reducing agent. (C) α,β\alpha,\beta-unsaturated methylketone will give iodoform reaction. (D) Isopropyl alcohol will not give iodoform test. (E) Methanoic acid will give positive iodoform test. Choose the correct answer from the options given below:

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  3. Question 3

    This type asked 4 times: 2021 Paper 4, 8 Apr 2023, 8 Apr 2024, 4 Apr 2026 S2. This one: 4 Apr 2026 S2 See all 4 of this type

    41
    The descending order of acidity among the following compounds is (A) (B) (C) (D) (E) Choose the correct answer from the option given below options

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  4. Question 4

    This type asked 4 times: 29 Jan 2024, 9 Apr 2024, 22 Jan 2025, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 4 of this type

    39
    A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is :

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  5. Question 5

    This type asked 4 times: 2021 Paper 2, 30 Jan 2023, 11 Apr 2023, 29 Jan 2025. This one: 29 Jan 2025 See all 4 of this type

    41
    The product (P)(P) formed in the following reaction is →Zn−HgHCl  Product (p)\underset{HCl}{\overset{Zn - Hg}{\rightarrow}}\ \ Product\ (p)

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  6. Question 6

    This type asked 3 times: 23 Jan 2026 S1, 6 Apr 2026 S2, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 3 of this type

    47
    ' x ' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. ' y ' is the major product obtained from the benzene by reacting it with ethanoyl chloride in the presence of anhydrous AlCl3{AlCl}_{3}. Product (major) obtained by heating x and y in the presence of alkali is z . Total number of π\pi (pi) electrons in z is ____\_\_\_\_ .

  7. Question 7

    This type asked 3 times: 28 Jun 2022, 30 Jan 2024, 2 Apr 2026 S2. This one: 2 Apr 2026 S2 See all 3 of this type

    41
    An organic compound " x " where molar ratio of C , O and H are equal, on treatment with 50%KOH50\% KOH under reflux followed by acidification produced " y ". The most likely structure of " y " is: [Molar mass of ' x ' is 58 g mol−158\text{ }g{\text{ }mol}^{- 1} ]

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  8. Question 8

    This type asked 3 times: 2021 Paper 19, 1 Feb 2024, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 3 of this type

    38
    Match the LIST-I with LIST-II
    List-I ReagentsList-II Name of Reaction involving carbonyl compound
    (A)NH2−NH2, KOH{NH}_{2} - {NH}_{2},\ KOH(I)Tollen's Test
    (B)Ag(NH3)2OHAg\left( {NH}_{3} \right)_{2}OH(II)Clemmensen Reduction
    (C)Aq. CuSO4{CuSO}_{4}, sodium potassium tartrate, KOH(III)Wolff-Kishner Reduction
    (D)Zn−Hg, HClZn - Hg,\ HCl(IV)Fehling's Test
    Choose the correct answer from the options given below

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  9. Question 9

    This type asked 3 times: 2021 Paper 9, 26 Jul 2022, 4 Apr 2025. This one: 4 Apr 2025 See all 3 of this type

    41
    An organic compound (X)(X) with molecular formula C3H6OC_{3}H_{6}O is not readily oxidised. On reduction it gives (C3H8O(Y)\left( C_{3}H_{8}O(Y) \right. which reacts with HBr to give a bromide (Z) which is converted to Grignard reagent. This Grinard reagent on reaction with (X) followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds (X),(Y)(X),(Y) and (Z)(Z) respectively are :

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  10. Question 10

    This type asked 3 times: 2021 Paper 3, 2021 Paper 14, 28 Jan 2025. This one: 28 Jan 2025 See all 3 of this type

    43
    The compounds that produce CO2CO_{2} with aqueous NaHCO3NaHCO_{3} solution are : (A) (B) (C) (D) (E) Choose the correct answer from the options given below :

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