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In S N 2 reactions, the correct order of reactivity for the following compounds : CH 3 Cl,CH 3 CH 2 Cl, (CH 3 ) 2 CHCl and (CH 3 ) 3 CCl is

1. CH 3 Cl > CH 3 CH 2 Cl > (CH 3 ) 2 CHCl > (CH 3 ) 3 CCl
2. CH 3 CH 2 Cl > CH 3 Cl > (CH 3 ) 2 CHCl > (CH 3 ) 3 CCl
3. (CH 3 ) 2 CHCl > CH 3 CH 2 Cl > CH 3 Cl > (CH 3 ) 3 CCl
4. CH 3 Cl > (CH 3 ) 2 CHCl > CH 3 CH 2 Cl > (CH 3 ) 3 CCl

Correct answer: CH 3 Cl > CH 3 CH 2 Cl > (CH 3 ) 2 CHCl > (CH 3 ) 3 CCl

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