The displacement of $Cl$ from chlorobenzene to obtain phenol requires strong reaction conditions. However,the chlorine in $2, 4-$ dinitrochlorobenzene is easily displaced because ................

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:

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

Identify the major product formed when $p$-isopropyltoluene (also known as $p$-cymene) reacts with a mixture of concentrated $HNO_3$ and concentrated $H_2SO_4$.

Nitrobenzene on nitration gives

For the reaction shown,the best combination of reactants to obtain $o$-bromonitrobenzene is: