i.
Reaction where substitution of one or more atoms in a molecule for
another atom takes place are called substitution reactions. Saturated
hydrocarbons undergo substitution reaction.
ii.
In Substitution reaction one or more hydrogen atom of a hydrocarbon are
replaced by some other atom (like chlorine)
iii.
Ex: Substitution reaction of methane with chlorine.
Methane reacts with
chlorine in the presence of sunlight to form methyl chloride and hydrogen
chloride.
