Nitration of toluene occurs at the ....... position.

Which of the following compounds forms ortho-benzenedicarboxylic acid when oxidized by hot aqueous potassium permanganate?

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

Which represents an intermediate formed in the reaction of toluene and chlorine at elevated temperature in sunlight?

Which of the following is an example of a non-benzenoid aromatic compound?

Benzene reacts with $CH_3COCl$ in the presence of $AlCl_3$ to give