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

Which of the following is an $o-/p-$ directing group?

Which position will be attacked most rapidly by the nitronium ion $(NO_2)^+$ when the compound undergoes nitration with $HNO_3 / H_2SO_4$?

In Friedel-Crafts reactions,......... is used as a catalyst.

Which of the following is not a property of benzene?

When $o$-xylene is oxidized in the presence of $V_2O_5$,the product is: