Benzene and its derivatives Analytical, synthetic and other evidences in the derivation of structure of benzene, Orbital picture, Huckel?s rule Reactions of benzene ? nitration, sulphonation, halogenation- reactivity, Friedelcrafts alkylation- reactivity, limitations, Friedelcrafts acylation. Substituents, effect of substituents Structure and uses of DDT, Saccharin, BHC and Chloramine Phenols* Aromatic Amines* Aromatic Acids* Fats and Oils Polynuclear hydrocarbons: Structure and medicinal uses of Naphthalene, Phenanthrene, Anthracene, Diphenylmethane, Triphenylmethane Cyclo alkanes*