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Solution


Q.

Which among the following compounds will undergo fastest SN2 reaction                             [2024]
1  
2  
3  
4  

Ans.

(2)

Least crowded alkyl halide undergoes SN2 fastest, as nucleophile can approach the less crowded position with more ease. So order of reactivity of different alkyl halides for SN2 reaction is: 1°>2°>3°