Which step in the free-radical chlorination of methane generates chlorine radicals by homolytic cleavage of Cl2?
Answer and explanation
Correct answer: C. Initiation step
Initiation involves homolytic cleavage of the Cl-Cl bond by UV light (hnu) to produce two reactive chlorine free radicals: Cl2 -> 2 Cl. Propagation perpetuates the radical; termination combines two radicals.
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