If $mathrm{AB}_{4}$ molecule is a polar molecule,
Question:

If $\mathrm{AB}_{4}$ molecule is a polar molecule, a possible geometry of $\mathrm{AB}_{4}$ is :

  1. Square pyramidal

  2. Tetrahedral

  3. Rectangular planar

  4. Square planar


Correct Option: 1

Solution:

For $\mathrm{AB}_{4}$ compound possible geometry are

Structure with $s p^{3} d^{2}$ hybridisation is polar due to lone pair moment while in other possibilities molecules is non-polar. Square pyramidal can be polar due to lone pair moment as the bond pair moments will get cancelled out.

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