Q.
$ C_6H_6 \xrightarrow[{H_2SO_4}]{HNO_3} X \xrightarrow[{FeCl_3}]{Cl_2} Y $.
In the above sequence $Y$ can be
Solution:
$(HNO_3 + H_2SO_4)$ reagent is the agent for nitration in aromatic rings.
$HNO_3 + 2H_2SO_4 \to NO_2^+ + HSO_4^- + H_3O^+$
$—NO_2$ group is a meta directing group so chlorine atom goes to meta position of the ring.

