Amongst the following,the compound that is nitrated with difficulty is

Reaction of aqueous sodium hydroxide on $(i)$ ethyl bromide and $(ii)$ chlorobenzene gives

Which of the following reasons support that aryl halides are less reactive than alkyl halides towards nucleophilic substitution reactions?
$a)$ The formation of more stable arenium ion
$b)$ Partial double bond character of $C-X$ bond
$c)$ Longer $C-X$ bond
$d)$ $sp^2$ carbon bonded to $X$ is more electronegative

The decreasing order of reactivity of the given compounds towards nucleophilic substitution with aqueous $NaOH$ is:
$(I)$ $1$-bromo-$3$-nitrobenzene
$(II)$ $1$-bromo-$2,4,6$-trinitrobenzene
$(III)$ $1$-bromo-$4$-nitrobenzene
$(IV)$ $1$-bromo-$2,4$-dinitrobenzene

Give chemical reactions for the following conversions:
$(1)$ Nitrobenzene from phenol
$(2)$ $p$-methylacetophenone from benzene

In the following reaction,the compound $C$ is:
${C_7}{H_8}$ $\xrightarrow[\Delta]{3Cl_2} A$ $\xrightarrow{Br_2/Fe} B$ $\xrightarrow{Zn/HCl} C$