Best Reference Book for Physical Chemistry in IIT JAM Chemistry:

1. Physical Chemistry by P. Bahadur:
This book is highly recommended for students preparing for the IIT JAM Chemistry exam. It covers all the essential topics in physical chemistry in a clear and concise manner. The book includes detailed explanations, solved examples, and practice problems to help students grasp the concepts effectively.

2. Atkins' Physical Chemistry:
Another excellent reference book for physical chemistry is Atkins' Physical Chemistry. This book provides a comprehensive overview of the subject, covering thermodynamics, kinetics, quantum mechanics, and more. It also includes numerous exercises and problems for practice.

3. Physical Chemistry by K.L. Kapoor:
K.L. Kapoor's book on physical chemistry is also a popular choice among IIT JAM Chemistry aspirants. It offers a detailed explanation of the theoretical concepts along with numerous solved examples and practice questions to enhance the understanding of the subject.

4. University Chemistry by Bruce H. Mahan:
University Chemistry by Bruce H. Mahan is another recommended book for physical chemistry. It covers topics such as chemical kinetics, electrochemistry, and molecular structure in a comprehensive manner. The book also includes plenty of practice problems to help students prepare effectively for the exam.
These reference books are widely used by students preparing for the IIT JAM Chemistry exam due to their comprehensive coverage of the subject and practice-oriented approach. Students are advised to choose the book that best suits their learning style and preferences to excel in the exam.