The reaction $ArN_2^+ Cl^- + Cu + HCl \longrightarrow ArCl + N_2 + CuCl$ is known as:

Chlorobenzene is prepared commercially by

The chlorobenzene is generally obtained from a corresponding diazonium salt by reacting it with

The conversion of benzene diazonium chloride to bromobenzene can be accomplished by

Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

Conversion of benzene diazonium chloride to chlorobenzene is an example of which of the following reactions?