Which of the following give a white precipitate with excess bromine water?

Aphenol
B3-methylphenol
Ccyclohexanol
Dbenzoic acid

Answer: A, B

Phenols have an activated ring and are brominated at all free ortho and para positions to give insoluble polybromo derivatives, 2,4,6-tribromophenol and 2,4,6-tribromo-3-methylphenol respectively. Cyclohexanol is saturated and benzoic acid's ring is deactivated, so neither gives a precipitate.

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