Question

Define substitution or displacement reaction. Give the example.

Answer 1

$\textbf{Substitution reaction }$ :

A reaction in which one or more atoms in a molecule are replaced by equivalent atoms, is called substitution reaction.

CH4 + 2Cl2 -----> 4HCl + C

Answer 2

substitution reaction- in presence of sunlight chlorine is added to saturated hydrocarbon by replacing hydrogen atom
displacement reaction- more reactive elements diplace less reactive elements from its solution