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Question
What is hydrogenation? How hydrogenation of ethene occurs?
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Solution
Ethene reacts with hydrogen gas when heated in the presence of a catalyst like nickel to give ethane. The addition of hydrogen across the double bond is called hydrogenation.
\[\ce{\underset{Ethene}{CH2 = CH2} + H2 ->[Ni][300^\circ C] \underset{Ethane (saturated)}{CH3 - CH3}}\]
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