Question

What is hydrogenation? How hydrogenation of ethene occurs? Give one use of hydrogenation.

Answer 1

The addition of hydrogen across the double bond is called hydrogenation.
Ethene reacts with hydrogen gas when heated in presence of catalyst like
nickel, to give ethane.

\[\ce{CH2 = CH2 + H2 ->[Ni][300°C] CH3 - CH3}\]

Use of hydrogenation:

Hydrogenation of Oils: The oils can be converted into ghee which are semi solid at room temperature.