Identify the compound formed when But-2-ene is treated with KMnO_4 in dilute H_2SO_4.

MHT CET 2026 Chemistry question

Identify the compound formed when But-2-ene is treated with in dilute .

(A)Butanoic acid
(B)Acetic acidCorrect
(C)Butanal
(D)Butanol

Answer: (B)

Solution

Acidic (hot) is a strong oxidising agent that cleaves the C=C double bond of an alkene. Each carbon of the double bond becomes a carbonyl-containing group: a carbon carrying one hydrogen is oxidised to a carboxylic acid. But-2-ene, CH_3-CH{=}CH-CH_3, is symmetrical, so the cleavage gives two molecules of

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Question ID VK-098647