Which reaction is used to convert benzene diazonium chloride to bromobenzene?

Write the structures and names of the compounds formed when compound $A$ with molecular formula $C_7H_8$ is treated with $Cl_2$ in the presence of $FeCl_3$.

Explain the preparation of aryl halides from aromatic hydrocarbons.

Toluene is nitrated,and the resulting product is reduced. This is then diazotized and heated with cuprous bromide. What are the final products?

Presence of which of the following is suitable for the synthesis of bromobenzene from benzene diazonium salts?

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