JEE Main Chemistry question

Identify the compound that exhibits tautomerism.

(A)2-butene
(B)Lactic acid
(C)2-pentanoneCorrect
(D)Phenol

Answer: (C)

Solution

2-Pentanone has acidic α-hydrogens adjacent to its carbonyl, enabling keto–enol tautomerism. 2-Butene has no carbonyl; lactic acid's acidic proton is on

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Question ID VK-139124