This book is specially designed for B.Sc. chemistry honours degree students. However, it will be helpful to postgraduate students also. This book focuses on the fundamental aspects of physical chemistry, like chemical thermodynamics, liquid and gaseous states of matter, electrochemistry, phase equilibria, colligative properties, etc. Surface chemistry and colloid chemistry have been discussed in detail. Detailed discussions of photochemistry, chemical kinetics and solid state chemistry are the assets of this book. The book also highlights nuclear chemistry, chemical bonding and catalysis. The appendix contains a collection of reference tables. Different types of questions and numerical problems have been included at the end of almost every chapter.