Explanation:
When we add chlorine to a substance or compound then this process is known as chlorination.
For example, a process of chlorination is as follows.
Initiation : [tex]Cl_{2} \overset{light}{\rightarrow} 2Cl*[/tex]
where, Cl* is a free radical.
Propagation:
[tex]Cl* + CH_{4} \rightarrow HCl + *CH_{3}[/tex]
[tex]CH_{3} + Cl_{2} \rightarrow CH_{3}Cl + Cl*[/tex]
Termination:
[tex]2Cl* \rightarrow Cl_{2}[/tex]
[tex]Cl* + *CH_{3} \rightarrow CH_{3}Cl[/tex]
[tex]2*CH_{3} \rightarrow CH_{3}-CH_{3}[/tex]
Thus, we can conclude that out of the given options [tex]H_{2}[/tex] is not formed through a termination reaction in the chlorination of methane.
