Preparation of Aldehydes
Learn the main laboratory and industrial methods for synthesizing aldehydes, including oxidation, reduction, and named reactions.
Why this shows up in the exam
NEET and JEE often test your knowledge of reagents, conditions, and mechanisms for aldehyde synthesis.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
Identify compound X in the following sequence of reactions. CH3 Cl₂/hv H₂O X 373 K CHO
Push further
More challenging17 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
An aromatic compound 'X' with molecular formula C₈H₁₀ reacts with CrO₃ in acetic anhydride, followed by acidic hydrolysis, to give a compound 'Y' with molecular formula C₈H₆O₂. Compound 'Y' can be identified as:
More from Aldehydes, Ketones and Carboxylic Acids
Nucleophilic Addition to Carbonyl Compounds
Learn the mechanisms and outcomes of nucleophilic addition reactions to aldehydes and ketones, including cyanohydrin, hydrazone, and Schiff base formation.
Reactions of Carboxylic Acids and Their Derivatives
Study nucleophilic acyl substitution, esterification, hydrolysis, decarboxylation, and formation of anhydrides, imides, and acyl chlorides.
Aldol Condensation and Related Reactions
Learn the mechanism, requirements, and products of aldol condensation, including cross-aldol and dehydration to α,β-unsaturated carbonyls.
Reduction and Oxidation Reactions
Study the reduction of carbonyl and carboxylic compounds to alcohols or hydrocarbons, and their oxidation to acids or other products.
Chemical Tests for Functional Groups
Learn the qualitative tests for aldehydes, ketones, and carboxylic acids, such as Tollens', Fehling's, and others.
Acidity of Carboxylic Acids
Understand the factors affecting acidity, including substituent effects, resonance, and hydrogen bonding.