This video lecture from Alcohols, Phenols and Ethers (F.Sc. second year Chemistry) covers two different tests, the first of which is Lucas test which is used to distinguish between primary, secondary and tertiary alcohols based on the reaction time. The second test is Iodoform test which distinguishes between methyl and ethyl alcohol. 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.