In the Wurtz-Fittig reaction,a compound $X$ reacts with an alkyl halide. What is $X$?

Which one of the following reactions is most suitable for the preparation of $n$-propyl benzene?

$C_6H_6$ $\xrightarrow[\text{Conc. } H_2SO_4]{\text{Conc. } HNO_3} B$ $\xrightarrow{\text{Sn + HCl}} C$ $\xrightarrow[0-5^\circ C]{HNO_2} D$ $\xrightarrow{HBF_4} E$ $\xrightarrow{\Delta} F$
$F$ will be

Chlorobenzene $(X)$ when reacted with reagent '$A$' gets converted to phenol $(Y)$. The major product obtained from nitration of $X$ gets converted to $p$-nitrophenol $(Z)$ by reaction with reagent $B$. What are $A$ and $B$ respectively?

Which of the following is the strongest meta-directing group?

The correct sequential addition of reagents in the preparation of $3-$nitrobenzoic acid from benzene is: