This video lecture from Alcohols, Phenols and Ethers (F.Sc. second year Chemistry) covers the reactions of phenol in which benzene ring is involved. The hydroxyl group has electron releasing effect which makes it easier to add other substituents at ortho and para location. Nitro group gives nitrophenols including picric acid while sulphonation yields o- and p- hydroxyl benzene sulphonic acids. 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.