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Q. When $o$- or $ p- $ phenolsulphonic acid is treated with bromine water, the product formed is

ManipalManipal 2008Alcohols Phenols and Ethers

Solution:

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