This video lecture from Group VA and Group VIA Elements (F.Sc. second year Chemistry) covers the halides of phosphorus including phosphorus trichloride and phosphorus pentachloride. The structures, preparation, physical properties and chemical reactions of both compounds are discussed are detail. 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.