This video lecture from Electrochemistry (F.Sc. first year Chemistry) covers the technique to balance a redox reaction equation using the oxidation number method. The oxidation numbers of all elements in the compounds are first identified and then the change is observed to see which element is oxidizing and which one is reducing. The number of electrons in the oxidation and reduction are balanced leading to an overall balanced redox equation. 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.