Which of the following reactions is used to prepare toluene from bromobenzene?

Which of the following has the highest melting point?

Provide the following electrophilic substitution reactions of aryl halides:
$(i)$ Halogenation
$(ii)$ Nitration
$(iii)$ Sulphonation
$(iv)$ Friedel-Crafts reaction

Which of the following reactions does not give benzene?

Which of the following is least reactive towards $S_NAr$?

In the given reaction sequence,the conversion of $Y$ to $Z$ is: