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Cl· + CH4 → A + B A and B in the above atmospheric reaction step are:

1. C2H6 and Cl2
2. CHCl2 and H2
3. CH3· and HCl
4. C2H6 and HCl

Correct answer: CH3· and HCl

Solution

The reaction involves the chlorine radical (Cl·) abstracting a hydrogen atom from methane (CH4), resulting in the formation of a methyl radical (CH3·) and hydrochloric acid (HCl). This process is characteristic of radical chain reactions where a radical species reacts with a stable molecule to produce new radicals and other products.

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