Which of the following structures represents cumene?

Explain the position directional properties of groups in mono-substituted benzene with suitable examples.

Aromatic properties of $benzene$ are proved by

Explain the mechanism for the nitration of benzene.

The reaction of benzene with $CO$ and $HCl$ in the presence of anhydrous $AlCl_3$ gives :

The heat of hydrogenation of one double bond in cyclohexene is $28.6 \, kcal \, mol^{-1}$ and the heat of hydrogenation of benzene to cyclohexane is $50 \, kcal \, mol^{-1}$. The resonance stabilization energy of benzene is ...... $kcal \, mol^{-1}$.