Question

When benzenediazonium chloride in hydrochloric acid reacts with cuprous chloride, then chlorobenzene is formed. The reaction is called

• A. Gattermann reaction
• B. Perkin reaction
• C. Etard reaction
• D. Sandmeyer reaction

Answer 1

Answer: (D)

When benzene diazonium chloride is treated with cuprous chloride in $HCl$, chlorobenzene is formed.
This reaction is called Sandmeyer reaction. In this reaction, the diazonium group is replaced by chloro group.
Sandmeyer reaction is used to replace the diazonium group with chlorine, bromine or cyano group.