Which of the following compound gives benzoic acid when it reacts with hot/alkaline KMnO 4 followed by acidification.

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TestHub · Accepted Answer

Since all of the above compounds have alpha hydrogen, Hence they will react with $K M n O_{4}$ to give benzoic acid.
At benzylic $C$ if $H, C, O$ are present then this group convert into $- C O O H$ group by the oxidation by alkaline $K M n O_{4} .$

Chemistry - Halogen Derivative Question with Solution | TestHub

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