Hello Aspirant,

As we know that now the aspirants are facing their last time preparation before JEE-Main examination so now the solving papers should be the main priority because at this point of time reading of full concepts and chapters won't be the wise strategy so just be focused on solving papers and some important chapters which have more weightage as compare to that of others and for your reference I have mentioned those chapters :-

@Mathematics

Coordinate Geometry  -  20 marks

Limits, Continuity and Differentiability - 12 marks

Integral Calculus - 12 marks

Complex numbers and Quadratic Equation - 8 marks

Matrices and Determinants - 8 marks

Statistics and Probability - 8 marks

Vector Algebra - 8 marks

@Physics

Modern Physics - 20 marks

Heat and Thermodynamics - 12 marks

Optics - 12 marks

Current Electricity - 12 marks

Electrostatics - 12 marks

Magnetics - 8 marks

@Chemistry

Transition Elements and Coordination Chemistry  -  12 marks

Periodic table and Representative Elements - 12 marks

Thermodynamics And Gaseous State- 8 marks

Atomic Structure - 8 marks

Chemical Bonding - 8 marks

Chemical And Ionic Equilibrium - 8 marks

For more detailed preparation tips for JEE-Main 2021 kindly check out the link given below :-

https://engineering.careers360.com/articles/jee-main-preparation-tips

I hope this information helps you.

Good Luck!!