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When ethylbenzene is oxidized with KMnO4, which compound is produced?

1. benzyl alcohol
2. benzophenone
3. acetophenone
4. benzoic acid

Correct answer: benzoic acid

Solution

Oxidation of ethylbenzene with KMnO4 leads to the formation of benzoic acid, as the oxidation process converts the ethyl group into a carboxylic acid functional group.

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