The compound prepared by a substitution reaction of benzene is

Which of the following has the most stable enol form?

The major product of the reaction,$1$-methyl-$4$-isopropylbenzene + $CH_3COCl \xrightarrow{AlCl_3}$ is:

Which of the following compounds possesses the $C-H$ bond with the lowest bond dissociation energy?

The reagent used in Friedel-Crafts reaction is:

Identify the product $P$ obtained in the following reaction:
$\text{Benzene} + \text{Ozone (excess)}$ $\xrightarrow{CCl_4} \text{Benzene triozonide}$ $\xrightarrow{Zn/H_2O} P + H_2O_2$