Hi

Based on analysis of past year question papers of JEE Mains chapter wise weightage for JEE mains 2021 is provided below subject - wise

PHYSICS

*Modern Physics:- 20 marks
*Heat and Thermodynamics :- 12 marks
*Optics:- 12 marks
*Current Electricity :- 12 marks
*Electrostatics :- 12 marks
*Magnetics :- 8 marks
*Unit, Dimension and Vector:- 4 marks
*Kinematics :- 4 marks
*Laws of motion :- 4 marks
*Work, Power and Energy :- 4 marks
*Centre Of Mass, Impulse and Momentum :- 4 marks
*Rotation :- 4 marks
*Gravitation :- 4 marks
*Simple Harmonic Motion :- 4 marks
*Solids and Fluids :- 4 marks
*Waves :- 4 marks
*Electromagnetics Induction ; AC :- 4 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
* Solid State And Surface Chemistry :- 4 marks
* Nuclear Chemistry And Environment:- 8 marks
* Mole Concept :- 4 marks
* Redox Reaction :- 4 marks
* Electrochemistry :- 4 marks
* Chemical Kinetics:- 4 marks
* Solution and Colligative Properties :- 4 marks
* General Organic Chemistry:- 4 marks
* Stereochemistry:- 4 marks
* Hydrocarbon :- 4 marks
* Alkyl Halides :- 4 marks
* Carboxylic Acid and their Derivatives:- 4 marks
* Carbohydrates,amino acid and Polymers :- 4 marks
* Aromatic Compounds  :-  4  marks

MATHS

* 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
* Sets, Relation and Function:- 4 marks
* Permutations and Combinations :- 4 marks
* Binomial Theorem and Its Application:- 4 marks
* Sequences and Series:- 4 marks
* Trigonometry :- 4 marks
* Mathematical Reasoning :- 4 marks
* Differential Equation :- 4 marks
* Statics and Dynamics :- 4 marks
*  Differential Calculus :-  4  marks

You can check the same and have more information at our page,  the link for the same is provided below

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

Thank you

For exams like JEE Mains , you should not prefer only the analysis. You should have a good estimate of the syllabus and study it holistically. Just take the analysis as a estimator of your rank.

Visit the link provided below for the chapterwise weightage from career360.com (//career360.com) :

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

I hope my answer helps you. All the very best for your future endeavors!