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Chemistry - Aldehydes and Ketones

Practise 31 JEE Advanced previous year questions on Aldehydes and Ketones, compiled from papers spanning 2006 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty JEE Advanced tests.

Aldehydes and Ketones has been asked in 16 of the 27 years of JEE Advanced papers analysed (2000–2026), with 31 questions in all. 10% of them were easy, 68% moderate and 23% tough. Most of its questions came from 2012, with 4 questions that year. In the last three years (2024–2026) it had 2 questions across 6 papers, about 0.3 per paper.

The chapter's 6 topics are not weighted equally: Chemical reactions for aldehydes and ketones (18 questions, 58%), Tests for aldehyde and ketones (5 questions, 16%), and Method of preparation for Aldehydes (5 questions, 16%) have been asked the most. Over the last five years the most frequent topics have been Tests for aldehyde and ketones (2), Chemical reactions for aldehydes and ketones (1), and Method of preparation for Aldehydes (1). Chemical reactions for aldehydes and ketones has produced the most tough questions (5).

  1. 1Paragraph I: An organic compound \( {P}\) with molecular formula \( {C}_9 {H}_{18} {O}_2\) decolorizes bromine water and also shows positive2024 (Paper 2)Tests for aldehyde and ketones
  2. 2Paragraph I: An organic compound \( {P}\) with molecular formula \( {C}_5 {H}_{18} {O}_2\) decolorizes bromine water and also shows positive2024 (Paper 2)Tests for aldehyde and ketones
  3. 3In the following reactions, P, Q, R and S are the major products. The correct statement(s) about P, Q, R and S is(are)2023 (Paper 1)Chemical reactions for aldehydes and ketones
  4. 4The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with L2023 (Paper 1)Method of preparation for Aldehydes
  5. 5In the reaction scheme shown below, Q , R , and S are the major products. The correct structure of2020 (Paper 1)Chemical reactions for aldehydes and ketones
  6. 6Total number of hydroxyl groups present in a molecule of the major product P is ______2019 (Paper 2)Method of preparation for Aldehydes
  7. 7List - I includes starting materials and reagents of selected chemical reactions. List - II gives structures of compounds that may be formed2019 (Paper 2)Chemical reactions for aldehydes and ketones
  8. 8List-I includes starting materials and reagents of selected chemical reactions. List-II gives structures of compounds that may be formed as 2019 (Paper 2)Chemical reactions for aldehydes and ketones
  9. 9The reaction(s) leading to the formation of 1, 3, 5-trimethylbenzene is (are)2018 (Paper 1)Chemical reactions for aldehydes and ketones
  10. 10Paragraph: Treatment of benzene with CO / HCl in the presence of anhydrous AlCl 3 / CuCl followed by reaction with Ac 2 O / NaOAc gives comp2018 (Paper 1)Method of preparation for Aldehydes
  11. 11Paragraph: Treatment of benzene with CO / HCl in the presence of anhydrous AlCl 3 / CuCl followed by reaction with Ac 2 O / NaOAc gives comp2018 (Paper 1)Method of preparation for Aldehydes
  12. 12Compound P and R upon ozonolysis produce Q and S, respectively. The molecular formula of Q and S is C 8 H 8 O . Q undergoes Cannizzaro react2017 (Paper 2)Chemical reactions for aldehydes and ketones
  13. 13Positive Tollen's test is observed for2016 (Paper 1)Tests for aldehyde and ketones
  14. 14The major product of the following reaction sequence is2016 (Paper 2)Chemical reactions for aldehydes and ketones
  15. 15The major product of the following reaction is2015 (Paper 1)Chemical reactions for aldehydes and ketones
  16. 16Among the following, the number of reaction(s) that produce(s) benzaldehyde is2015 (Paper 2)Method of preparation for Aldehydes
  17. 17Consider all possible isomeric ketones, including stereoisomers of MW = 100. All these isomers are independently reacted with N a B H 4 (NOT2014 (Paper 1)Reactions for ketones
  18. 18The major product in the following reaction is2014 (Paper 2)Chemical reactions for aldehydes and ketones
  19. 19The total number of carboxylic acid groups in the product P is2013 (Paper 1)Chemical reactions for aldehydes and ketones
  20. 20After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is(are):2013 (Paper 2)Tests for aldehyde and ketones
  21. 21The number of aldol reaction(s) that occurs in the given transformation is :2012 (Paper 1)Reactions for aldehydes
  22. 22Preview not available - open to view this question.2012 (Paper 2)Chemical reactions for aldehydes and ketones
  23. 23In the following reaction sequence, the compound is an intermediate. gives effervescence on treatment with and a positive Baeyer's test. Que2012 (Paper 2)Tests for aldehyde and ketones
  24. 24In the following reaction sequence, the compound is an intermediate. gives effervescence on treatment with and a positive Baeyer's test. Que2012 (Paper 2)Chemical reactions for aldehydes and ketones
  25. 25Paragraph: An acylic hydrocarbon , having molecular formula , gave acetone as the only organic product through the following sequence of rea2011 (Paper 1)Chemical reactions for aldehydes and ketones
  26. 26Match the reactions in Column I with appropriate types of steps/reactive intermediate involved in these reactions as given in Column II.2011 (Paper 2)Chemical reactions for aldehydes and ketones
  27. 27Paragraph: A carbonyl compound , which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefi2009 (Paper 1)Chemical reactions for aldehydes and ketones
  28. 28Paragraph: A carbonyl compound , which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefi2009 (Paper 1)Chemical reactions for aldehydes and ketones
  29. 29Paragraph: In the following reaction sequence, product and are formed. K represent a reagent Question:2008 (Paper 1)Method of preparation for both aldehydes and ketones
  30. 30Cyclohexen on ozonolysis followed by reaction with zinc dust and water gives compound . Compound on further treatment with aqueous yields co2007 (Paper 2)Chemical reactions for aldehydes and ketones
  31. 31Identify the adduct2006Chemical reactions for aldehydes and ketones

Frequently Asked Questions

1.How many questions are available for Aldehydes and Ketones?

This chapter includes 31 questions compiled from JEE Advanced papers spanning 2006 to 2024.

2.Are these questions only from JEE Advanced, or from other exams too?

These are JEE Advanced questions specifically for the Aldehydes and Ketones chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Aldehydes and Ketones an important chapter for JEE Advanced Chemistry?

Aldehydes and Ketones has appeared in 16 of the 21 years of JEE Advanced papers covered here, with 31 questions across 22 papers - about one per paper it appears in.

4.What is the difficulty level of Aldehydes and Ketones questions in JEE Advanced?

Of the 31 questions analysed for this chapter, 10% are easy, 68% moderate and 23% tough. 2012 had the most, with 4 questions.

5.Which topics in Aldehydes and Ketones should I focus on?

These topics have carried the most weightage in Aldehydes and Ketones:

  • Chemical reactions for aldehydes and ketones - 18 questions (58%)
  • Tests for aldehyde and ketones - 5 questions (16%)
  • Method of preparation for Aldehydes - 5 questions (16%)
  • Chemical reactions for aldehydes and ketones has produced the most tough questions (5).
6.Is Aldehydes and Ketones's weightage in JEE Advanced going up or down?

Across all 22 papers analysed, Aldehydes and Ketones has averaged about 1.4 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.