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Q. When $ o\text{-} $ or $ p\text{-} $ phenol sulphonic acid is treated with bromine water, the product formed is

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Solution:

Like nitration, bromination of o- or p-phenol sulphonic acid occurs with simultaneous replacement of $ S{{O}_{3}}H $ group by Br atom to ultimately give 2, 4, 6-tribromophenol.

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