Chemistry - Aromatic Hydrocarbon Question with Solution | TestHub

$∆\mathrm{H}$ hydrogenation $\propto \frac{1}{\mathrm{stability} \mathrm{of} \mathrm{alkenes}}$stability of alkenes. In option $\left(1\right),$ the $\mathrm{\pi }$electrons are not in conjugation so alkene is least stable and heat of hydrogenation is maximum.