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Question

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

A
Hydrogen chloride
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B
Methyl radical
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C
Chloromethyl radical
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D
Chlorine radical
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Solution

The correct option is D Chlorine radical
In the free radical chlorination of methane, the chain initiation step involves the formation of chlorine radical. Here, the homolytic cleavage of Cl2 molecule takes place in the presence of heat or light because ClCl bond is weaker than CC and CH. Hence, ClCl is easier to break and forms chlorine radicals.
Chlorination of methane:


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