If AB4 molecule is a polar molecule, a possible geometry of AB4 is
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- Tetrahedral
- see-saw
- Square pyramidal
- Square planar
The Correct Option is B
Solution and Explanation
Square planar (\(\mathrm{XeF_4}\), 4 bond pairs + 2 lone pairs): symmetrical, non-polar.
Square pyramidal needs 5 bond pairs on the central atom (or 5 bonds + 1 lone pair), so it is the shape of AB5, not AB4.
See-saw (\(\mathrm{SF_4}\), 4 bond pairs + 1 lone pair, sp3d): unsymmetrical, the dipoles do not cancel, so it is polar.
Answer: (2) see-saw
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