Hello Aspirant,

For JEE-Main , I am enlisting down those topics that usually comprises of higher weightage as compared to that of others :-

@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
• Nuclear Chemistry And Environment:- 8 marks

@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

For complete details about important chapters and other weightage related information kindly check out the links given below :-

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

You can also check out JEE-Main Learner package for your preparation :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

I hope this information helps you.

Good Luck!!