The correct structure of benzene was proposed by

Nitration of nitrobenzene yields .....

Write down the products of ozonolysis of $1, 2-$dimethylbenzene ($o-$xylene). How does the result support the Kekul\text{é} structure for benzene?

The molecular formula of the product formed when benzene is reacted with excess of chlorine molecules under ultra-violet light is

Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.

Which of the following statements is incorrect for the nitration of an aromatic compound?