The correct order of reactivity towards electrophilic substitution for the compounds $(I)$ Aniline,$(II)$ Benzene,and $(III)$ Nitrobenzene is:

The set of meta-directing functional groups from the following sets is:

Which of the following statements are correct with respect to benzene?
$(i)$ It forms triozonide with $O_3$.
$(ii)$ It is non-planar.
$(iii)$ It forms only one monosubstituted product with $CH_3COCl$ in the presence of anhydrous $AlCl_3$.
$(iv)$ It forms hexachlorobenzene on heating with $Cl_2$ under photochemical conditions.

The electrophile required for the chlorination of benzene in the presence of $FeCl_3$ is.....

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

Among the following,the aromatic compounds are:
$(A)$ Heptafulvene
$(B)$ Benzene
$(C)$ Cyclopentadienyl anion
$(D)$ Cyclopentadienyl cation
Choose the correct answer from the following options: