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Question

Cumene on treatment with KMnO4 gives :-

A
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B
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C
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D
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Solution

The correct option is B
Oxidation of Alkyl Benzenes: When treated under strong oxidising conditions, benzylic-H systems are oxidised all the way to the carboxylic acid. The alkyl substituent can be methyl-, 1o or 2o alkyl.
3o alkyl are not oxidised because they lack a benzylic-H (Must have at ​
least 1 benzylic hydrogen​.)
Cumene on treatment with KMnO4 gives benzoic acid. The side chain of benzene is oxidized to COOH group.

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