The structural formula of $3,4$-benzpyrene is ...... .

Among the following compounds $(I-III)$,the correct order of reactivity towards electrophilic substitution reaction is:

$A$ compound $X$ formed after heating coke with lime reacts with water to give $Y$,which on passing over red hot iron at $873 \ K$ produces $Z$. The compound $Z$ is:

Nitrobenzene can be prepared from benzene by using a mixture of conc. $HNO_3$ and conc. $H_2SO_4$. In the nitrating mixture,$HNO_3$ acts as a

Identify the anti-aromatic compound.

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