Which equation shows a propagation step in the free radical substitution of methane with chlorine?
Answer and explanation
Correct answer: C. CH4 + Cl -> CH3 + HCl
- Step 1: Propagation steps consume one radical and form another, so the chain continues. *Answer: CH4 + Cl -> CH3 + HCl. Why not the others:* the second equation shows initiation; the third shows termination; the last is the overall equation, not a step.
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