Dear Sidharth, no doubt O.P Tandon is the best physical chemistry book. The book covers the entire Physical Chemistry syllabus including Atomic Structure, Radioactivity and Nuclear Transformation and Stoichiometry. The OP Tandon Physical Chemistry book covers each and every topic related to the JEE preparation.

P.W Atkins is another famous book you can look after. Atkins Physical Chemistry book can help you clear concepts used in solving Physical Chemistry numerical quite well. It includes enhanced explanations and mathematical presentation of the concepts; several solved examples, and self-test. There are exercises at the end of each chapter. There is a checklist of key equations too at the end of every chapter which is quite useful for students during revisions.

All the best

Hope this helps