This video lecture from Fundamental Principles of Organic Chemistry (F.Sc. second year Chemistry) covers a brief introduction to the natural sources of organic compounds, in particular Coal. It includes the origin of coal from organic remains buried deep under the surface of earth and the various forms of coal (lignite, bituminous and anthracite) based on the carbon content and purity. It also covers how coal is pyrolyzed into coke, coal gas, coal tar and an ammonical liquor. 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.