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
The reaction sequence given below is carried out with 16 moles of X. The yield of the major product in each step is given below the product in parentheses. The amount (in grams) of S produced is. [figure] Use: Atomic mass (in amu): H = 1, C = 12, O = 16, Br = 80
JEE Advanced 2025 Paper 1
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