Match reactions in Column I with the corresponding products formed as given in Column II. Column I Column II A. C ₆ H ₅ N ₂^+ Cl ^- + H ₂ O warm P. p–Bromophenol B. C ₆ H ₅ OH + Br ₂ in CS ₂ 273K Q. 2,4,6–Tribromophenol C. C ₆ H ₅ OH + (i) CHCl ₃ + NaOH (aq) (ii) HCl R. Phenol D. C ₆ H ₅ OH + Br ₂ (aq) S. 2–Hydroxybenzaldehyde

Step-by-step solution

Reaction A: Warming benzene diazonium chloride with water yields phenol. Thus, A matches with R. Reaction B: Bromination of phenol in a non-polar solvent like CS₂ at low temperature ( 273 K) yields monobromophenols, primarily p-bromophenol as the major product. Thus, B matches with P. Reaction C: Phenol reacts with chloroform in the presence of aqueous NaOH followed by acidification to form 2-hydroxybenzaldehyde (salicylaldehyde). This is the Reimer-Tiemann reaction. Thus, C matches with S. Reaction D: Phenol react