JEE Main Chemistry question

The aldol condensation of CH₃–CHO results in the formation of

(A)CH₃–CH(OH)–CH₂–CHO (the simple aldol addition product)
(B)CH₃–CH=CH–CHO (crotonaldehyde)Correct
(C)CH₃–CO–CH₂–CHO
(D)CH₃–CH₂OH + CH₃COOH

Answer: (B)

Solution

Two molecules of acetaldehyde combine under dilute base: the enolate of one attacks the carbonyl carbon of the other to give 3-hydroxybutanal (the aldol). "Aldol condensation"

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Question ID VK-149095