Question

Give an account of VSEPR theory and its applications.

Answer 1

Valence shell electron pair repulsion (VSEPR) theory is a model used to predict the geometry of individual molecules from a number electron pairs surrounding their central atoms. VSEPR theory holds on the assumption that each atom in a molecule will achieve a geometry that minimizes the repulsion between the valence shell of that given atom. For in stance beryllium fluoride(BeF2 ) is linear, boron trifluoride is trigonal planar, methane is tetrahedral.

This theory is important in understanding the shapes of molecules.  

Answer 2

Answer:

Valence shell electron pair Repulsion theory was proposed by Sidgwick and Powell.later it was developed by nyholm and Gillespie .

POSTULATES:

1)The shape of molecules depend upon number of electron pair in valency shell of central atom.

2)The shape of molecul also depends upon Repulsion between electron pair.

3)The bond angle of of molecules depends upon Repulsion between electron pair and electronegativity difference between central atom and bond atom.

4)A lone pair of electron occupies more space around the central atom.

5)l.p-l.p->l.p-b.p>b.p-b.p

Explanation: