The addition of hydrogen to an unsaturated hydrocarbon to obtain a saturated hydrocarbon is called hydrogenation.
Example- It has important industrial applications like preparation of vegetable ghee from vegetable oil.
Essential conditions for the reaction are:
a) Presence of an unsaturated hydrocarbon.
b) Presence of a catalyst such as nickel (Ni) or palladium.
The changes in the physical property with the formation of the product are as mentioned-
a) Change of unsaturated compound from the liquid state to saturated compound in solid state.
b) The boiling or melting points of a product are increased.
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