Which among the following molecules is (a) involved in $\mathrm{sp}^3 \mathrm{~d}$ hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?
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- $\mathrm{XeF}_4$
- $\mathrm{XeF}_2$
- $\mathrm{PF}_5$
- $\mathrm{SF}_4$
The Correct Option is D
Solution and Explanation
(b) different bond lengths: in $PF_5$ and $SF_4$ the axial and equatorial bonds differ ($XeF_2$ has two identical bonds).
(c) lone pair on the central atom: $SF_4$ has one lone pair, $PF_5$ has none.
Only $SF_4$ satisfies all three: option (4).
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