This video lecture from Reaction Kinetics (F.Sc. first year Chemistry) covers the physical methods used to determine the rates of reactions. In the physical method, a physical property is observed which alters as the rate changes. Calibration is done before finding the actual rates. Several method have been discussed including spectrometry and spectrophotometry, electrical conductivity method, dilatomatric method, refractrometric method and optical rotation method. 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