The reaction of benzene with chlorine in the presence of $Fe$ produces.........

Which of the following is a Gattermann reaction?

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

The best method to introduce fluorine in the benzene ring as a substituent is:

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 $FeCl_3$.

Which of the following are intermediates in the Sandmeyer reaction?
$(i)$ $C_6H_5N^{+} \equiv NCl^{-}$
$(ii)$ $C_6H_5N^{+} \equiv N$
$(iii)$ $\overset{\centerdot }{C}_6H_5$
$(iv)$ $C_6H_5Cl$