This video lecture from Chemical Bonding (F.Sc. First Year Chemistry) covers the Valence Shell Electron Repulsion Theory, its basic assumption and the postulates which tells about how lone pairs and bond pairs take part in defining the geometry of the molecule and why lone pair occupy more space than bond pairs, the reason why single, double and triple bonds effects are same on geometry. Find more e-learning material and educational video lectures in Urdu at maktab.pk. These videos are free to use for promotional and commercial purpose by keeping the credits to Maktab.