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Q.
Which of the following reactions is not an example of electrophilic substitution in benzene ring?
Hydrocarbons
Solution:
$Cl _{2}$ is added to the benzene ring in presence of sunlight to give benzene hexachloride. It is a free radical reaction.
In this reaction electrophilic addition reaction takes place. Thus it is not an example of electrophilic substitution reaction.