Which catalyst is used in the following reaction?

$A$ methyl group attached to benzene can be oxidized to a carboxyl group by reacting with:

Identify the reaction shown in the following chemical equation: $C_6H_6 + CH_3Cl \xrightarrow{\text{Anhydrous } AlCl_3} C_6H_5CH_3 + HCl$

What is the characteristic chemical reaction of benzene?

Which of the following compounds is not aromatic?

The number of $\pi$-bonds and $\sigma$-bonds present in naphthalene are respectively