The reaction: $ArN_2Cl \xrightarrow{Cu / HCl} ArCl + N_2$ is known as

In Gattermann reaction,a diazonium group is replaced by $\underline{X}$ using $\underline{Y}$. $\underline{X}$ and $\underline{Y}$ are:
$\underline{X} \quad \underline{Y}$

The conversion of benzene diazonium chloride to chlorobenzene in the presence of $CuCl / HCl$ is known as:

The compound from which chlorobenzene cannot be prepared easily is

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

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