Dear Mithra,
It is good to hear that you are preparing for jee exams and hope these books might help you out.
MATHS-Problems Plus for IIT Jee by Asit Das Gupta is good and you can use cengage publication books for previous iit problems and for different pattern of question(Try to avoid watching solutions if you buy cengage).
PHYSICS-Follow every concept from HC Verma first because it the best book for concepts and then go for books like Arihant`s DC PANDEY books for each branch. And I E Rhodov can be solved during your revision time. Dont go for cengage for physics as the concepts are confusing. Try to solve as many problems as you can from those books.
CHEMISTRY-For physical chemistry, buy GRB OP Tandon book for concepts and for solving problems buy GRB A S Singh book. For inorganic chemstry, learn concepts from J D LEE simplified version book for iit(mug up as much as you can for inorganic chemistry as it is scoring subject)and buy GRB K Kumar book for solving problems .For oraganic chemistry, buy ARIHANT`S Ranjeeth Shahi for organic chemistry for concepts and GRB Himanshu Pandey for organic chemistry solving problems.(*second books in chemistry for each branch contain only problems and their key.)
1.Pay careful attention to detail. In physics, chemistry and mathematics, all the topics should be covered and selective study should be avoided since the questions are of an objective type, as well as being large in number.
2.Be aware that the JEE syllabus of class 11th and 12th is up to 45% and 55% of the IIT JEE question papers.
3.Study these physics topics extensively: Fluids, Waves and Sound, Electromagnetic Induction, Capacitors and Electrostatics, Mechanics, Optics and Modern Physics.
4.Study these topics for mathematics: Complex numbers, Circle, Parabola, Hyperbola in Co-ordinate Geometry, Probability, Limits, Vectors, Matrices in Algebra, Functions, differentiability, Definite Integral in calculus and Application of Derivatives.
5.Study these topics for chemistry: Co-ordination, Chemical equilibrium in Physical Chemistry, Electrochemistry, Thermodynamics, Quantitative Analysis, Chemical bonding in Inorganic Chemistry and Organic Chemistry.
6.Prepare yourselves mentally for IIT-JEE. "The success is to be achieved", keeping this in mind the aspirants must accept themselves as deserving candidates for JEE success because during preparation confidence plays an important role..
7.Do continuous effort. IIT-JEE preparation requires continuous effort. Each subject must be given proper and regular time. Instead of preparing one subject for some days then other subjects, all the three subjects (Physics, Chemistry and (Mathematics) must be given time each day. It also helps in breaking monotony.
8.Have proper guidance. In today's competitive era, proper guidance is needed for success. The pattern of JEE has become concept based completely. So you need clear and doubtless concepts in each and every topic, to achieve a good rank in JEE.
All the very best for your preparation and you can ask me if you have anydoubt regarding iit.