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

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Q. An alkene on vigorous oxidation with $ KMnO_{4} $ gives only acetic acid. The alkene is

Uttarkhand PMTUttarkhand PMT 2008

Solution:

Since the alkene on oxidation gives only acetic acid, therefore, the alkene must be symmetrical containing two carbon-atoms on either side of the double bond, ie, $2$-butene
$CH _{3} CH = CHCH _{3} \xrightarrow{ KMnO _{4}} 2 CH _{3} COOH$