This video lecture from Aliphatic Hydrocarbons (F.Sc. second year Chemistry) covers the physical properties and the reactivity of saturated hydrocarbons. Physical properties which have been discussed include their state, color, odor, density, melting and boiling points along with their variation as the molecular size or number of carbon atoms increases. The structure of alkanes and the type of hybridization is also discussed followed by the strength of sigma bonds of alkanes as compared to that of pi bonds. 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.