The reaction between chlorobenzene and chloral in the presence of concentrated sulphuric acid produces $:$

How will you convert benzene into:
$(i)$ $p-$nitrobromobenzene
(ii) $m-$nitrochlorobenzene

The major product formed in the Friedel-Crafts acylation of chlorobenzene is $p-$chloroacetophenone. Identify the correct structure of the major product.

Diphenyls are a potential threat to the environment. How are these produced from aryl halides?

Arrange the following compounds in decreasing order of their rate of $S_NAr$ reaction:
$(i)$ $p$-nitrochlorobenzene
(ii) $m$-nitrochlorobenzene
(iii) $2,4$-dinitrochlorobenzene
(iv) chlorobenzene
$(v)$ $2,4,6$-trinitrochlorobenzene

What is the ratio of $sp^3$ carbons to $sp^2$ carbons in the product '$P$' of the given sequence of reactions?