This textbook has been designed to meet the needs of B.Sc. Fourth Semester students of Chemistry as per the UGC Choice Based Credit System (CBCS). With its traditional approach to the subject, this textbook lucidly explains principles of chemistry. Important topics such as transition elements, coordination chemistry, crystal field theory, kinetic theory of gases, liquids, solids and chemical kinetics are aptly discussed to give an overview of inorganic and physical chemistry. Laboratory work has also been included to help students achieve solid conceptual understanding and learn experimental procedures.