Aldehydes, Ketones and Carboxylic Acids
Previous year questions with solutions · 2019 – 2026
15 Questions
6 Papers covered
17.65% Weightage 2026 ▲ 88.2% vs last year
Year-wise statistics questions · papers · average per paper · weightage Year Questions Papers Avg / paper Weightage 2026 6 2 3 17.65% ▲ 88.2% vs last year 2025 3 2 1.5 9.38% ▼ 46.9% vs last year 2024 6 2 3 17.65%
All 15 MCQ 4 Matching 3 Multiple Correct 3 Numerical 5 Topic All topics 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 Year All years 2026 2025 2024
Ques. 1 JEE Advanced 2026 (Paper-2)
Natural rubber on complete ozonolysis ( O3/Zn-H2O) gives compound X as the major product. X gives positive iodoform and Tollen's tests. X on heating with aqueous NaOH gives Y as the major product. Y is
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