AcceleratorX
Youngling
Study only one book guys (and girls, if any), don't juggle between "CBSE ka book" and "IIT ka book".
For Organic Chemistry a really good book I will recommend is B.S Bahl and Arun Bahl from S.Chand. Similar one is available for physical chemistry but it's not so good. J.D. Lee is good for inorganic chemistry, Ira Levine works well for physical chemistry (Note: Physics has good overlap with P-chem so if your physics concept is good, chances are you will not need to learn a lot of P-chem).
Physics and Maths - the recommended books should suffice. You are all good mathematicians anyway since you're training to do problem solving
For Organic Chemistry a really good book I will recommend is B.S Bahl and Arun Bahl from S.Chand. Similar one is available for physical chemistry but it's not so good. J.D. Lee is good for inorganic chemistry, Ira Levine works well for physical chemistry (Note: Physics has good overlap with P-chem so if your physics concept is good, chances are you will not need to learn a lot of P-chem).
Physics and Maths - the recommended books should suffice. You are all good mathematicians anyway since you're training to do problem solving