The reagent used in Friedel-Crafts reaction is:

From the following compounds, choose the one which is not aromatic.

Which of the following structures represents cumene?

Hexane $\xrightarrow[\substack{773 \ K \\ 10-20 \ atm}]{Cr_2O_3} X$ $\xrightarrow[\text{Anhydrous } AlCl_3]{CH_3COCl} Y$. $Y$ in the above sequence of reactions is

Aromatic compounds burn with a sooty flame because

Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.
Reason : $C-H$ bond is stronger than $C-D$ bond.