Question

Bef2 molecule is linear while sf2 is angular though both are triatomic

Answer 1

Due presence of lone pair electrons, SF2 is not lenear. Refer VSEPR theory

Answer 2

Answer:

The shape of the molecule is known by its hybridization which is calculated by the formula:

where, V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

a) For  

The number of electrons is 2 that means the hybridization will be  and the electronic geometry of the molecule will be linear. There are two atoms around the central carbon and hence the molecular geometry will also be linear.

b) For  

Explanation: