Question

Consider the following reactions,

The end product 'S' is

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Here the conversion occurs as follows.
Nitro group on the benzene ring is meta directing group. Hence, on bromination it forms metabromo nitrobenzene is formed. $-N{O}_2$ group on hydrogenation converts to $-N{H}_2$ . Aniline undergo diazotization reaction with sodium nitrite in the presence of HCl. Diazonium salt on reaction with $CuCl/HCl$ gives chlorobenzene.