Chemistry - Aldehydes and Ketones
Practise 25 WBJEE previous year questions on Aldehydes and Ketones, compiled from papers spanning 2009 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.
Aldehydes and Ketones has been asked in 15 of the 18 years of WBJEE papers analysed (2009–2026), with 25 questions in all. 28% of them were easy, 44% moderate and 28% tough. Most of its questions came from 2024, with 3 questions that year. In the last three years (2024–2026) it had 4 questions across 3 papers, about 1.3 per paper.
The chapter's 5 topics are not weighted equally: Chemical reactions for aldehydes and ketones (17 questions, 68%), Method of preparation for both aldehydes and ketones (4 questions, 16%), and Tests for aldehyde and ketones (2 questions, 8%) have been asked the most. Chemical reactions for aldehydes and ketones has also led over the last five years, with 4 questions. Chemical reactions for aldehydes and ketones has produced the most tough questions (4).
- 1Which of the following statement(s) is/are correct about the given compound?2025Chemical reactions for aldehydes and ketones
- 2In the following sequence of reaction compound M is2024Method of preparation for both aldehydes and ketones
- 3Preview not available - open to view this question.2024Chemical reactions for aldehydes and ketones
- 4Ozonolysis of o-xylene produces2024Method of preparation for both aldehydes and ketones
- 5Structure of \(M\) is,2023Chemical reactions for aldehydes and ketones
- 6\( { {L}}{=}~ [ { (ii) } {H}_3 {O}^{ }]{ { (i) } {PhMgBr}} { {M}}{=}~ []{ {CrO}_3 / {H}^{ }} { {N}}{=}~ []{ {Ph}_3 {P}= {CH}_2} {Ph}_2 {C}= 2023Chemical reactions for aldehydes and ketones
- 7The product of the following reaction is :2022Method of preparation for both aldehydes and ketones
- 8Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?2022Method of preparation for both aldehydes and ketones
- 9The compounds A and B are respectively2021Chemical reactions for aldehydes and ketones
- 10The reduction product of ethyl 3-oxobutanoate by in methanol is2020Chemical reactions for aldehydes and ketones
- 11What is the major product of the following reaction?2020Chemical reactions for aldehydes and ketones
- 12The correct order of reactivity for the addition reaction of the following carbonyl compounds with ethylmagnesium iodide is2018Chemical reactions for aldehydes and ketones
- 13Amongst the following compounds, the one that will not respond to Cannizzaro reaction upon treatment with alkali is2016Chemical reactions for aldehydes and ketones
- 14Which of the following reactions will not result in the formation of carbon-carbon bonds?2016Chemical reactions for aldehydes and ketones
- 15The product of the above reaction is2015Chemical reactions for aldehydes and ketones
- 16In the reaction the proxtuct is2015Method of preparation for Aldehydes
- 17The reagents to carry out the following conversion are2014Chemical reactions for aldehydes and ketones
- 18In the following reaction, the product is2014Chemical reactions for aldehydes and ketones
- 19The intermediate in the following Wittig reaction is2014Chemical reactions for aldehydes and ketones
- 20In the following species, the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is2013Chemical reactions for aldehydes and ketones
- 21Upon treatment with Al(OEt) followed by usual reactions (work up), CH will produce2012Chemical reactions for aldehydes and ketones
- 22Reaction of formaldehyde and ammonia gives2011Reactions for aldehydes
- 23Which of the following compounds is not formed in iodoform reaction of acetone2011Tests for aldehyde and ketones
- 24Which one of the following produced when acet one is saturated with gas?2010Chemical reactions for aldehydes and ketones
- 25For making distinction between 2-pentanone and 3-pentanone the reagent to be employed is2009Tests for aldehyde and ketones
Frequently Asked Questions
1.How many questions are available for Aldehydes and Ketones?
This chapter includes 25 questions compiled from WBJEE papers spanning 2009 to 2025.
2.Are these questions only from WBJEE, or from other exams too?
These are WBJEE 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 WBJEE Chemistry?
Aldehydes and Ketones has appeared in 15 of the 18 years of WBJEE papers covered here, with 25 questions across 15 papers - about 2 per paper it appears in.
4.What is the difficulty level of Aldehydes and Ketones questions in WBJEE?
Of the 25 questions analysed for this chapter, 28% are easy, 44% moderate and 28% tough. 2024 had the most, with 3 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 - 17 questions (68%)
- Method of preparation for both aldehydes and ketones - 4 questions (16%)
- Tests for aldehyde and ketones - 2 questions (8%)
- Chemical reactions for aldehydes and ketones has produced the most tough questions (4).
6.Is Aldehydes and Ketones's weightage in WBJEE going up or down?
Across all 15 papers analysed, Aldehydes and Ketones has averaged about 1.7 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.