What are $A$ $\&$ $B$ in the following reaction?
$m-Br-C_6H_4-Cl$ $\xrightarrow{Mg/THF} A$ $\xrightarrow[(ii) \ aq. NH_4Cl]{(i) \ CH_3CHO} B$

Explain the mechanism of nucleophilic substitution reaction of ortho and para nitrohaloarenes.

What is the product of the reaction between nitrobenzene and $CH_3Cl$ in the presence of anhydrous $AlCl_3$?

As compared with chlorocyclohexane, which of the following statements correctly apply to chlorobenzene?
$A$. The magnitude of negative charge is more on chlorine atoms.
$B$. The $C-Cl$ bond has partial double bond character.
$C$. $C-Cl$ bond is less polar.
$D$. $C-Cl$ bond is longer due to repulsion between delocalised electrons of the aromatic ring and lone pairs of electrons of chlorine.
$E$. The $C-Cl$ bond is formed using $sp^2$ hybridised orbital of carbon.
Choose the correct answer from the options given below:

In nucleophilic substitution reactions,alkyl halides are more reactive than aryl halides because...

What is the product $X$ in the following Wurtz-Fittig reaction?