Write the structures of $A, B$ and $C$ in the following:

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Solution

Benzamide react with bromine in presence of $K O H$ to form aniline. ON treatment of sodium nitrite, $H C l$ withaniline it convert to benzene diazonium salt which undergo reaction with potassium iodide to produce benzene iodide.

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(a) N H_{3}, / H e a t - ------ \to A B r_{2}, / K O H (a q) - -------- \to B C H C l_{3} + a l c . K O H - ---------- \to C (b) C_{6} H_{5} N_{2}^{+} B F_{4} N a N O_{2}, / C u - ------ \to H e a t A F e, / H C I - ---- \to O B C H_{3} C O C l, p y r i d i n e - ----------- \to C

Identify A, B, C, D, and E in the following schemes and write their structures:

A, B

C

C H_{3} - C O O H N H_{3} / Δ - --- \to A B r_{2} / K O H (a q) - -------- \to B C H C l_{3} + a l c . K O H - ---------- \to C

C_{6} H_{5} N_{2}^{+} B F_{4}^{-} N a N O_{2} / C u - ------ \to △ A F e / H C l - ---- \to B C H_{3} C O C l / p y r i d i n e - ----------- \to C

\begin{matrix} (i) & C_{6} H_{5} - & C O O^{-} {N H_{4}}^{+} & △ - - \to & A & B r_{2} / K O H - ----- \to & B & C H_{3} C O C l / p y r i d i n e - ----------- \to & C (i i) & C_{6} H_{5} {N_{2}}^{+} {B F_{4}}^{-} & N a N O_{2} / C u - --------- \to △ & A & S n / H C l - ---- \to & B & C H C l_{3} + a l c . K O H - ---------- \to & C \end{matrix}

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