If AB4 molecule is a polar molecule, a possible geometry of AB4 is :
(1) Square pyramidal
(2) Rectangular planar
(3) Square planar
(4) Tetrahedral
1 Answer
Ans. (1) Square pyramidal
Sol. For AB4 compound possible geometry are
| S. No. | Bond pair | Lone pair | Total | Hybridisation | Geometry | Polarity |
|---|---|---|---|---|---|---|
| 1 | 4 | 0 | 4 | sp3 | Tetrahedral | non polar |
| 2 | 4 | 1 | 5 | sp3d | Sea-saw | polar |
| 3 | 4 | 2 | 6 | sp3d2 | Square Planar | non polar |
Square pyramidal can be polar due to lone pair moment as the bond pair moments will get cancelled out.