This video lecture from Chemical Equilibrium (F.Sc. Chemistry Book 1) covers the concept of the Le Chateliers principle, how stress affect the system and what system does as a reaction to that stress. The effect of change in the concentration has been illustrated in 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.