In the free radical chlorination of methane, the chain initiating step involves the formation of

Solution :
\[C{{H}_{4}}+C{{l}_{2}}\xrightarrow{h\nu }C{{H}_{3}}Cl\]
Chain initiation step involves the fission of $$C{l_2}$$  molecule into chlorine free radical.
\[C{{l}_{2}}\xrightarrow{h\nu }C{{l}^{\bullet }}+C{{l}^{\bullet }}\]