Chemical Bonding and Molecular Structure - Result Question 72

####73. Which one of the following has the pyramidal shape?

(a) CO32−

(b) SO3

(c) BF3

(d) PF3

[1999]

Show Answer

Solution:

  1. (d) PF3 has pyramidal shape

Phosphorus exist in sp3 hybridiation state hence it exist in tetrahedral geometry. But due to presence of lone pair its shape is pyramidal.

(b) XeF4 hybridisation is =12(V+X−C+A) hence V=8 (no. of valence e−) X=4 (no of monovalent atom)

12(8+4+0−0)=6,sp3d2

C=0 charge on cation

A=0 (charge on anion).

The shape is

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