Which of the following statements is correct?
One mole each of benzene and hydrogen, when reacted, give $\frac{1}{3}$ mole of cyclohexane and $\frac{2}{3}$ mole of unreacted hydrogen.
It is easier to hydrogenate benzene than cyclohexene.
Cyclohexadiene and cyclohexene cannot be easily isolated during controlled hydrogenation of benzene.
Hydrogenation of benzene to cyclohexane is an endothermic process.
