Benzene reacts with $CH_3COCl$ in the presence of $AlCl_3$ to give

During the mixed acid nitration of benzene,concentrated $HNO_3$ behaves like:

The major product of the following reaction is:

Explain why only one mono-substitution product is possible in benzene. Provide examples of its structure and name.

The number of $\pi$-bonds and lone pair$(s)$ present in the major benzenoid product,which is formed when benzene reacts with acetyl chloride in the presence of anhydrous aluminium chloride,are respectively:

The order of decreasing reactivity towards an electrophilic reagent for the following compounds is:
$(i)$ Benzene
$(ii)$ Toluene
$(iii)$ Chlorobenzene
$(iv)$ Phenol