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

- B

- C

- ✓







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$[Fe(CN)_6]^{4-} \rightarrow [Fe(CN)_6]^{3-} + e^{-1}\, ;$ $ E^o = -0.35\, V$
$Fe^{2+} \rightarrow Fe^{3+} + e^{-1}\ ;$ $E^o = -0.77\, V$


Vapours $(B)+$ $\xrightarrow{{{K_2}{S_2}{O_8}}}\,(C)\, + \,(D)$
$(D)\,\xrightarrow{{(B)}}$ Brown $(E)$
Hybridisation of central atom in $(E)$ is