MCQ
Which of the following is most reactive towards $S_N2$
- A

- B

- C

- ✓







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$(I)$ $CO_2$ $(II)$ $Br_2$ $(III)$ $SnCl_2$ $(IV)$ $HF$ $(V)$ $NMe_3$
(At. nos. $Mn = 25, Fe = 26, Co = 27, Ni = 28$)