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JEE Main Chemistry question

ChemistryAlcohols, Phenols and EthersJEE Main

How many of the following reagents can be used to distinguish between alcohols and phenols? (1) Na metal (2) (3) Neutral (4) NaOH (5) A diazonium salt (coupling reaction)

Answer: 3

Solution

Phenols give a characteristic colour with neutral ferric chloride, a white precipitate with bromine water (via ring bromination), and a coloured azo dye on coupling with a diazonium salt, none of which alcohols do, making reagents (2), (3), and (5) valid distinguishing

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Question ID VK-149044