Question

The product A formed in the following reaction is:

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is C

To determine product "A", we must analyze the reaction shown. This reaction transforms an aromatic amine into its diazonium salt, followed by a Sandmeyer reaction.

1. The initial compound is aniline, \(\text{C}_6\text{H}_5\text{NH}_2\).
2. Reacting aniline with \(\text{NaNO}_2\) and \(\text{HCl}\) at \(0^\circ\text{C}\) produces the diazonium salt, \(\text{C}_6\text{H}_5\text{N}_2^+\text{Cl}^−\).
3. In the subsequent Sandmeyer reaction step, this diazonium salt reacts with \(\text{Cu}_2\text{Cl}_2\), substituting the diazonium group with a chlorine atom.

This substitution of the diazonium group with chlorine yields chlorobenzene, \(\text{C}_6\text{H}_5\text{Cl}\).

Therefore, chlorobenzene is the resulting product "A". The option representing chlorobenzene is displayed below:

Conclusion: Chlorobenzene is product "A" of this reaction, as indicated by the correct option presented above.