Question
Chlorination of methane does not occur in dark because
A.
methane can form free radicals in presence of sunlight only
B.
to get chlorine free radicals from $$C{l_2}$$ molecules energy is required
C.
substitution reaction can take place only in sunlight and not in dark
D.
termination step cannot take place in dark. It requires sunlight
Answer :
to get chlorine free radicals from $$C{l_2}$$ molecules energy is required
Solution :
Chlorination of methane is free radical substitution. To get chlorine free radical energy is required which is provided by sunlight to initiate the reaction.
\[C{{l}_{2}}\xrightarrow{h\upsilon }C\dot{l}+C\dot{l}\]