The following reaction is:

Identify reactant $(A)$ used in the following conversion.
Chlorobenzene $+ A \xrightarrow[anhydrous]{AlCl_3} 2-\text{chloroacetophenone} + 4-\text{chloroacetophenone}$

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:

$p-$Nitrotoluene on further nitration gives :

Which of the following compounds has the most difficulty in breaking the $C-X$ bond?

Which of the following is not used in the Friedel-Crafts reaction?