Benzene reacts with $CH_3Cl$ in the presence of anhydrous $AlCl_3$ to form

Describe various oxidation reactions of benzene.

The number of $\sigma$ bonds in $o$-xylene is

Which one of these is not compatible with arenes?

Assertion : Nitrating mixture used for carrying out nitration of benzene consists of conc. $HNO_3 +$ conc. $H_2SO_4$.
Reason : In presence of $H_2SO_4$,$HNO_3$ acts as a base and produces $NO_2^+$ ions.

What is the expected order of reactivity of the following compounds in electrophilic chlorination $(Cl_2 + FeCl_3)$? (more reactive $ > $ less reactive)
$I: C_6H_5CH_2CO_2H$
$II: C_6H_5N(CH_3)_2$
$III: C_6H_5OCOCH_3$
$IV: C_6H_5CCl_3$