Which one of the following is least reactive in a nucleophilic substitution reaction?

Identify the major product of the following nitration reaction:

Which of the following statements are correct?
$A$. The $C-Cl$ bond in chlorobenzene is shorter than in chloromethane.
$B$. It is more difficult to replace chlorine from chlorobenzene than from benzyl chloride.
$C$. The $C-Cl$ bond in chlorobenzene has some double bond character.
$D$. Chlorobenzene on chlorination gives $m$-dichlorobenzene.

Which of the following shows the fastest rate of hydrolysis?

Identify the product of the following Wurtz-Fittig reaction.

The strongest ortho-para and strongest meta-directing groups respectively are