1. The Book is designed to give students a thorough training in general reactions and identification of radicals of inorganic mixtures and also the reaction of simpler members of each of the main classes of organic compounds. 2. Emphasis has been laid on presenting details about the identification tests, methods of preparation of derivatives and list of organic compounds belonging to the same group. This will help students to get complete information of a particular group of compounds at once. 3. For the more advanced students , an extended section on separation of organic mixtures and the identification of the component compounds is given.