MCQ
Identify the correct reactivity order for $S_N1$ reaction


- A$i > ii > iii$
- ✓$ii > iii > i$
- C$i > iii > ii$
- D$iii > i > ii$

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(At. nos. $Cr = 24, Mn = 25, Fe = 26, Co = 27$)


$\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}\left(\mathrm{NH}_{2} \mathrm{CH}_{3}\right)\right] \mathrm{Cl}$ is
[Assume $100 \%$ ionisation of the complex and $CaCl _{2},$ coordination number of $Cr$ as $6,$ and that all $NH _{3}$ molecules are present inside the coordination sphere $]$