Question

Benzene $+3H_2\stackrel{Ni/{200}^{\circ }C}{⟶}X$,
The product $X$ is :

• A. Cyclohexane
• B. Cyclohexene
• C. n - Hexene
• D. Cyclopentane

Answer 1

The correct option is A Cyclohexane

Hydrogenation of aromatic hydrocarbon is an addition reaction. Here, hydrogen will get add on to the double bonds to give saturated compounds.
At high temperature and/or high pressure, in the presence of Ni catalyst, hydrogenation of benzene gives cyclohexane.
All the three double bonds in benzene will get hydrogenated to give cyclohexane.