Mathematics:
1. First you must be able to solve problems from NCERT class XI and class XII books.
2. For best concepts you can purchase ‘IIT Mathematics’ by M.L.Khanna.
3. For the most abundant supply of difficult question topic-wise and their solutions, you may buy ‘New Pattern IITJEE Mathematics’ of Arihant Publications by Dr. S.K.Goyal.
4. For Trigonometry and Coordinate Geometry the books by S.L.Loney are useful.
5. Tata Mcgraw Hills (TMH) books
Physics:
1. Concepts of Physics, Vol.-I, by H.C.Verma
2. Concepts of Physics, Vol.-II, by H.C.Verma
3. Problems in Physics by I.E.Irodov
4. Fundamentals of Physics, by Halliday, Resnik and Walker.
5. Physics by D.C.Pandey, Arihant Publications
Chemistry:
1. NCERT Chemistry text books of class XI and class XII.
2. Organic Chemistry by Morrison and Boyd.
3. For numerical problems-P.Bahadur
4. Inorganic Chemistry by J.D.Lee
5. Physical Chemistry by R.C.Mukherjee and also by P.Bahadur.
6. Organic, Physical and Inorganic Chemistry books by O.P.Tandon.
also...
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