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**(i)** Reaction: A benzene ring with two **–COOH** groups is treated with **KMnO₄ / H₂O**. * KMnO₄ is a strong oxidizing agent. * But the compound already has **–COOH groups**; usually, KMnO₄ oxidizes **alkyl side chains** on aromatic rings __________ ________ _______ _____ _____ _________ ___ _________ __________ _______ ________ ____.
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