The benzene molecule is

Explain the bromination of benzene with its mechanism.

In which of the following compounds does the $C-H$ bond exhibit the lowest bond dissociation energy?

Among the xylenes,which is thermodynamically most stable?

Identify compound $A$ in the following reaction:
$\text{Benzene} + \text{ozone (excess)}$ $\rightarrow \text{Benzenetrizonide}$ $\xrightarrow{A} \text{glyoxal}$

Which of the following cannot be used in the Friedel-Crafts reaction?