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Identify the compounds in the following.
Question
$\text{C}_6\text{H}_5\text{CONH}_2 \xrightarrow{\text{Br}_2 / \text{aq. KOH}} [\text{A}] \xrightarrow{\text{NaNO}_2 + \text{HCl (ice cold)}} [\text{B}] \xrightarrow{\text{Cu}_2\text{Cl}_2 + \text{HCl}} [\text{C}]$
Answer
Answer
Official answer keyA - aniline: C6H5NH2
B - benzenediazonium chloride: C6H5N2Cl
C - chlorobenzene: C6H5Cl
A = aniline ($\mathrm{C_6H_5NH_2}$)
B = benzenediazonium chloride ($\mathrm{C_6H_5N_2^+Cl^-}$)
C = chlorobenzene ($\mathrm{C_6H_5Cl}$)
From ISC 2026 Specimen Chemistry Paper 1, question 18(i).