Aldehydes, Ketones and Carboxylic Acids
Previous year questions with solutions · 2019 – 2026
15 Questions
6 Papers covered
17.65% ↑88.2% Weightage in 2026
Year-wise statistics questions · papers · average per paper · weightage Year Questions Papers Avg / paper Weightage 2026 6 2 3 17.65% ↑88.2% 2025 3 2 1.5 9.38% ↓46.9% 2024 6 2 3 17.65%
All 15 MCQ 4 Matching 3 Multiple Correct 3 Numerical 5 TopicAll Alkyne hydration, Clemmensen reduction and soap Cannizzaro reaction and ketal formation Cannizzaro, decarboxylation, Williamson synthesis; yield Chemoselective reduction, lactonisation and stereochemistry Cumene process and haloform reaction Decarboxylation of β-keto acids, cyclic anhydride Kolbe electrolysis, Friedel–Crafts acylation, Rosenmund reduction Oxime reactions: dehydration, SNAr, benzisoxazole Ozonolysis followed by intramolecular aldol Ozonolysis of rubber and intramolecular aldol Ozonolysis, aldol, protection and hydration Preparation of Carboxylic Acids Reaction sequences – product identification Reagent sequence – chemoselective reductions Structure elucidation – ozonolysis, β-keto acid decarboxylation YearAll 2026 2025 2024
1
Considering LiBH4 reduces an ester group to the corresponding alcohol and does not reduce a carboxylic acid group, the correct statement about the major products P, Q, R and S is [figure]
P & Q are identical, and R & S are diastereomers. P & Q are diastereomers, and R & S are identical. P & Q are diastereomers, and R & S are diastereomers. P & Q are identical, and R & S are identical. JEE Advanced 2026 Paper 1
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