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  4. Identify the total number of compounds from the following which will yield monocarboxylic acid on oxidation with KMnO 4 in acidic medium.

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Q. Identify the total number of compounds from the following which will yield monocarboxylic acid on oxidation with $KMnO _{4}$ in acidic medium.Chemistry Question Image

Aldehydes Ketones and Carboxylic Acids

Solution:

In case of aromatic compounds, the complete side chain (consisting of an alkyl group) is oxidised to $- COOH$ group irrespective of the length of the chain except in case of tert-butylbenzene. In case of cyclohexene, it gives dicarboxylic acid.
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$\therefore $ Compounds (i), (ii) and (v) will yield monocarboxylic acids on oxidation with $KMnO _{4}$ in acidic medium.