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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 C Chlorine radical

These three types of steps are encountered in every free-radical reaction.

The bottom line here is that by counting the number of radicals created or destroyed in each step, you can determine if the step is initiation, propagation, or termination.

  • Intiation -> net formation of radicals
  • Propagation -> no change in the number of free radicals
  • Termination -> net destruction of free radicals
    Option D is correct.

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