This textbook has been designed to meet the needs of B.Sc. (Honours) Third Semester students of Chemistry as per the UGC Choice Based Credit System (CBCS). Maintaining the traditional approach to the subject, this textbook lucidly explains the basics of Inorganic, Organic and Physical Chemistry. Important topics such as acid & bases, chemistry of s & p block elements, alcohols, phenols, ethers & epoxides, phase equilibrium and chemical kinetics are aptly discussed to give an overview of inorganic, organic and physical chemistry. Laboratory work has also been included to help students achieve solid conceptual understanding and learn experimental procedures.