This video lecture from Solutions (F.Sc. Chemistry Book 1) covers the concept of the fractional distillation of the non ideal solution, the difference between the zeotropes and azeotropes and the positive and negative deviation in the composition – vapor pressure curve. 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.