1. Physics- H.C. Verma Concepts of Physics is the best book, for physics preparations as it covers concepts from the very basics to highly complicated problems. The book is not only nice for its theoritical explanations but also because its practice problems involves rigorous thinking and application of concepts which helps you refine your understanding to the subject. You can also use PHYSICS MCQ BHARTI BHAWAN PUBLICATION for more practicing.
2. Maths-Jee always had a reputation of setting difficult maths paper, so it really needs lot of practice. ARIHANT releases a series of books covering lot of topics like Differential calculus, Integral Calculus etc. These books have lot of solved problems which are highly conceptual and going through them enhances understanding of the subject. You can also try IIT Mathmatics by A. DAS GUPTA.
3. CHEMISTRY - Chemistry can be divided into 3 parts, for PHYSICAL CHEMISTRY nothing beats PHYSICAL CHEMISTRY by R.C. Mukherjee; for organic chemistry -Solomon and Fryhle Organic Chemistry is a really nice book whils for inorganic J.D.Lee Inorganic Chemistry can be referred.