Question

Explain the following on the basis of the valence bond theory. (Any 2)
i. BF3 planar but NH3 is not.
ii. CCl4 and SiCl4 are tetrahedral.

Answer 1

Answer:

cat and dog is the right answer

Answer 2

Now CCl4 and SiCl4 both are the molecules in which the central atom has no lone pair. In this case, if number of electron pairs is 4, the geometry of the molecule is tetrahedral. (ii) BF3 is planar because, central atom has no lone pairs.