Aldehydes and Ketones
Preparation from acid chlorides, nitriles, esters; benzaldehyde from toluene and benzene; reactions — oxidation, reduction, oxime and hydrazone formation; aldol condensation, Cannizzaro reaction; haloform reaction; nucleophilic addition with RMgX, NaHSO3, HCN, alcohol, amine.
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Take a full mock →Q1 · Aldehydes and Ketones · HARD
Consider the following reaction sequence: Acetone is treated with excess benzaldehyde in the presence of dilute NaOH to give product P. How many α,β-unsaturated carbonyl systems are present in the major product P?
Q2 · Aldehydes and Ketones · MEDIUM
A ketone with molecular formula C₇H₁₄O is treated with NaBH₄ in methanol to give a racemic mixture of alcohols. The total number of such ketones (including stereoisomers) is:
Q3 · Aldehydes and Ketones · HARD
A compound P (C₅H₁₀O) reacts with NH₂OH to give oxime and undergoes iodoform reaction. How many α-hydrogens are present in compound P?
Q4 · Aldehydes and Ketones · MEDIUM
An aldehyde X undergoes Cannizzaro reaction in the presence of concentrated NaOH. Which structural feature must X possess?