What is obtained when benzene reacts with fuming nitric acid?

Which one of these is not true for benzene?

Give methods of preparation for benzene.

How many products are obtained by the substitution of two hydrogen atoms in a benzene ring? Provide examples.

Which order is correct for the decreasing reactivity to ring monobromination of the following compounds: $C_6H_5CH_3$ $(I)$,$C_6H_5COOH$ $(II)$,$C_6H_6$ $(III)$,and $C_6H_5NO_2$ $(IV)$?

Cyclopentadiene is much more acidic than cyclopentane. The reason is that