How many of the following will form acetic acid on reaction with acidic KMnO_4: prop-1-ene, 2-methylbut-2-ene, 2-methylpropene, but-2-ene, cyclohexene?

JEE Main Chemistry question

How many of the following will form acetic acid on reaction with acidic KMnO: prop-1-ene, 2-methylbut-2-ene, 2-methylpropene, but-2-ene, cyclohexene?

Answer: 3

Solution

Oxidative cleavage gives acetic acid from a =CH–CH-type alkene carbon. Prop-1-ene (CH–CH= side gives acetic acid), 2-methylbut-2-ene (its =CH–CH side gives acetic acid), and but-2-ene (both

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Question ID VK-142891