The correct statement is

Options

A. cyclohexadiene and cyclohexene cannot be isolated with ease during controlled hydrogenation of benzene
B. one mole each of benzene and hydrogen when reacted gives 1/3 mole of cyclohexane and 2/3 mole unreacted hydrogen
C. hydrogenation of benzene to cyclohexane is an endothermic process
D. it is easier to hydrogenate benzene when compared to cyclohexene.

Answer

A

Explanation

During the hydrogenation of benzene, only cyclohexane can be isolated.