As you said you will appear in IIT JEE exam and for the same asking for important books , so on your demand I am providing same for you :

Must have books for JEE Preparation
PHYSICS for IIT JEE PREPARATION
S.No Book Author
1 Problems in physics A. A Pinsky
2 Concepts of Physica Vol I and II H.C.Verma
3 Fundamentals of Physics Halliday, Resnick & Walker
4 Problems in General Physics I.E. Irodov
5 Aptitude Test Problems in Physics Krotov
6 A collection of questions and Problems in Physics L. A. Sena
7 Advance physics Nelkon and Parker
8 Feynman Lectures on Physics R. P. Feynman
9 Elements of Dynamics Part I & II S. L Loney
10 Dynamics of a Particle & of Rigid Bodies S.L. Loney
11 Physics Vols I & II Tipler
12 Problem in physics V. Zubov & V. Shalnov
CHEMISTRY for IIT JEE PREPARATION

Books for Organic Chemistry
S.No Book Author
1 Organic Chemistry Arihant Prakashan
2 Organic Chemistry Bahal & Bahal
3 Organic Chemistry Volume 1 I. L. Finar
4 Organic Chemistry J.D March
5 Concept of Organic Chemistry M. S. Chauhan
6 Organic Chemistry O.P. Tandon
7 Organic Chemistry Paula Bruice Yurkanis
8 Organic Chemistry Peter Sykes
9 Organic Chemistry Solomons
10 Organic Chemistry Morrison and Boyd

Books for Inorganic Chemistry
S.No Book Author
1 Inorganic Chemistry Arihant Prakashan
2 Inorganic Chemistry J.D. Lee
3 Inorganic Chemistry O.P. Tandon

Books for Physical Chemistry
S.No Book Author
1 University Chemistry Bruce H. Mahan
2 General Chemistry Ebbing
3 IITJEE Chemistry O.P Agarwal
4 Physical Chemistry O.P. Tandon
5 Physical Chemistry P. Bahadur (For Reading Theory)
6 Numerical Chemistry P.Bahadur (G.R.Bathla & Sons)
7 Physical Chemistry P.W.Atkins
8 Numerical Chemistry R.C. Mukharjee
MATHEMATICS for IIT JEE PREPARATION
S.No Book Author
1 Algebra Arihant
2 Differential Calculus Arihant
3 Integral Calculus Arihant
4 Vector and 3D Geometry Arihant Prakshan
5 Higher Algebra Barnard and Child
6 Co-ordinate Geometry Dr. Gorakh Prasad
7 A problem book in mathematical Analysis G. N. Berman
8 Higher Algebra Hall Knight
9 Problems in Calculus of One Variable I.A. Maron
10 Calculus J. Edward
11 Algebra made easy K.P. Basu
12 Maths Krechmar
13 Elementy Maths Patapov DoroFeev
14 Maths XIth and XIIth R. S. Aggarwal
15 Maths XI & XII R.D. Sharma
16 Trigonometry S. L. Loney
17 Co-ordinate Geometry S. L. Loney
18 Vector Shanti Narayan
19 Mathematics Tata McGraw Hill (TMH)
20 Problems in Mathematics V. Govorov,N. Miroshin and S. Smirnova
21 Introduction Probability & Its Applications W. Feller