Addition reactions with hydrogen takes place in unsaturated hydrocarbons which are Alkenes and Alkynes.
The General formulae for Alkenes and Alkynes are following:
The essential conditions required for an addition reaction to occur is:
1. Hydrocarbon should be unsaturated.
2. The addition of hydrogen to an unsaturated carbon.
The chemical equation giving the name of the reactant and the product of such a reaction is as follows:
When Ethene undergoes addition reaction with hydrogen in presence of Ni as a catalyst, the product formed is a saturated hydrocarbon which is Ethane. The chemical reaction is as follows:
This reaction is called Hydrogenation.
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