JEE Main Chemistry question
Phenol (1 mole) reacts completely with bromine to give *s*-tribromophenol (2,4,6-tribromophenol). How many moles of bromine are required?
Answer: 3
Solution
C₆H₅OH + 3 Br₂ → 2,4,6-(Br)₃C₆H₂OH + 3 HBr. Three ring hydrogens are substituted, each consuming one Br₂ molecule.