The correct increasing order of number of lone pair of electrons on the central atom of $\mathrm{SnCl}_2,…

The correct increasing order of number of lone pair of electrons on the central atom of $\mathrm{SnCl}_2, \mathrm{XeF}_2, \mathrm{CIF}_3$ and $\mathrm{SO}_3$ is
  1. $\mathrm{SO}_3 \lt \mathrm{CIF}_3 \lt \mathrm{SnCl}_2 \lt \mathrm{XeF}_2$
  2. $\mathrm{SO}_3 \lt \mathrm{SnCl}_2 \lt \mathrm{CIF}_3 \lt \mathrm{XeF}_2$
  3. $\mathrm{XeF}_2 \lt \mathrm{SnCl}_2 \lt \mathrm{CIF}_3 \lt \mathrm{SO}_3$
  4. $\mathrm{XeF}_2 \lt \mathrm{CIF}_3 \lt \mathrm{SnCl}_2 \lt \mathrm{SO}_3$

Solution

$\begin{array}{|c|c|c|c|}\hline \text{Molecule} & \begin{array}{c} \text{Valence electron} \\ \text{of CMI} \end{array} & \begin{array}{c} \text{Lone} \\ \text{pair} \end{array} & \begin{array}{c} \text{Bond} \\ \text{pair} \end{array} \\ \hline \mathrm{SnCl}_2 & 4 & 1 & 2 \\ \mathrm{ClF}_3 & 7 & 2 & 3 \\ \mathrm{SO}_3 & 6 & 0 & 3 \\ \mathrm{XeF}_2 & 8 & 3 & 2 \\ \hline\end{array}$

Asked in: AP EAMCET 2024 (19 May Shift 2)

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