which are the most scoring topics in physics and maths?

Dear Bikram

For iit jeee there is no fixed weitage, it  vary from year to year...
f you will see the pattern of last year papers,then you will find that question were framed in such a way that it include more than one      chaptre. and in whole paper almost entire syllabus are covered .so it is not advisable to leave any topic.

But the important topics are.

Maths:     

calculus, Vectors, Complex numbers, co-ordinate geometry(2D+3D) Quadratic equations.

Physics:   

Optics, Modern physics, Thermodynamics, A/C circuits, Fluid mechanics, Experiments.



but I will suggest you to cover alll the topics and give more stress on above given topics.