State the condition required for the reactions of Catalytic hydrogenation of ethene.

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Solution

The condition required for the reactions of Catalytic hydrogenation of Ethene:
Hydrogen gas of two volumes and ethylene gas of one volume are mixed.
This mixture is passed over the Nickel which is heated at $300 ° C$ .
As a result Ethane gas is formed by the addition reaction.
$CH \equiv CH + H - H \overset{Ni / 300 ° C}{\to} {CH}_{2} = {CH}_{2} + H - H \overset{Ni / 300 ° C}{\to} {CH}_{3} = {CH}_{3} Ethyne gas Ethene gas Ethane gas$

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