Question

Define the addition reaction. Give an example.

Answer 1

The reaction in which an unsaturated hydrocarbon combines with another substance to give a single product is called an addition reaction.

Example:

Addition of hydrogen to ethene (unsaturated hydrocarbon) in presence of nickel to form ethane (saturated hydrocarbon)

\[\ce{CH2 = CH2 + H2 ->[Ni catalyst][heat] CH3 - CH3}\]