JEE Main Chemistry question

Alkyne CH, when treated with alkaline KMnO followed by acidification with HCl, gives a mixture of (CH)CHCOOH + CHCHCOOH. The alkyne CH is

(A)3-heptyne
(B)2-methylhex-2-ene
(C)2-methylhex-3-yneCorrect
(D)3-ethylhex-2-yne

Answer: (C)

Solution

Oxidative cleavage of an alkyne's triple bond gives one carboxylic acid from each side. Isobutyric acid, (CH)CHCOOH, requires an alkyne carbon flanked by an isopropyl group, (CH)CH–C; propionic acid,

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Question ID VK-142396