Exam

The major thing that you should follow is the pattern. Maths is given the highest priority with 100 marks and is considered to be the lengthiest paper. Indeed, it is lengthy but the art of choosing questions play a key role here. One has to choose questions at first that are easy to solve and are scoring, then try for the little tough ones and if there is time, go for the difficult. If you choose questions correctly, 60+ in maths can be achieved. Now, physics and chemistry have 50 marks each. For physics, I would say chapters of optics, electrostatic, AC and magnetism are very important. One must be good in waves and kinematics and chemistry, it's easy if and only if you have gone through NCERT thoroughly.