Question

Why is the reaction between methane and chlorine considered to be a substitution reaction?

Answer 1

HERE YOUR ANSWER.....

when a mixture of mathane and chlorine is exposed to ultraviolet light
typically sunlight a substitution reaction occurs or the and organic product is chloromathane.

Answer 2

In the presence of sunlight, chlorine replaces the hydrogen atoms of methane one by one, so it is called a substitution reaction.