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Question

An alkene on vigorous oxidation with KMnO4 gives only acetic acid. The alkene is :

A
CH3CH2CH=CH2
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B
CH3CH=CHCH3
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C
(CH3)2C=CH2
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D
CH3CH=CH2
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Solution

The correct option is A CH3CH=CHCH3
Since, the alkene on oxidation gives only aeetic acid, therefore, the alkene must be symmetrical, containing two C-atoms on either side of the double bond i.e., 2-butene.
CH3CH=CHCH3KMnO4−−−−2CH3COOH

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