Topics with high weightage have been stated below:

Physics:

• Physics and Measurement - 4% weightage
• Properties of Solids and Liquids - 5% weightage
• Thermodynamics - 9% weightage
• Electrostatics - 9% weightage
• Current Electricity - 8% weightage
• Magnetic Effects of Current and Magnetism - 5% weightage
• Electromagnetic Waves - 5% weightage
• Optics - 10% weightage
• Dual Nature of Matter and Radiation - 6% weightage
• Electronic devices - 14% weightage
• Communication Systems - 5% weightage

Chemistry:

• Some basic concepts in chemistry - 5% weightage
• States of matter - 3% weightage
• Atomic Structure - 3% weightage
• Solutions - 5% weightage
• Chemical Thermodynamics - 4% weightage
• Equilibrium - 6% weightage
• Redox Reaction and Electrochemistry - 4% weightage
• Chemical kinetics - 3% weightage
• Surface Chemistry - 1% weightage
• General Principle and process of Isolation of metals - 2% weightage
• Classification of Elements and Periodic table - 3% weightage
• Hydrogen - 3% weightage
• p- Block Elements - 5% weightage
• S - Block Elements Alkali and Alkaline Earth Metals - 1% weightage
• Chemical Bonding and Molecular Structure - 5%
• d - and f - BLOCK ELEMENTS - 4% weightage
• Co-ordination Compounds - 4% weightage
• Environmental Chemistry - 3% weightage
• Purification and Characterisation of Organic Compounds -s 3% weightage
• S ome Basic Principles of Organic Chemistry - 3% weightage
• Hydrocarbons - 3% weightage
• Organic Compounds containing Halogens - 2% weightage
• Organic Compounds containing Oxygen - 6% weightage
• Organic Compounds Containing Nitrogen - 1% weightage
• Polymers - 3% weightage
• Biomolecules - 3% weightage
• Chemistry in Everyday Life - 4% weightage
• Principles Related to Practical Chemistry - 3% weightage

For chemistry the weightage is symmetrically distributed thats why provided the whole.

Mathematics:

• Sets, Relations and Functions - 5% weightage
• Complex numbers and quadratic equations - 7% weightage
• Matrices and Determinants - 7% weightage
• Sequence and series - 5% weightage
• Integral Calculus - 9% weightage
• Limit, continuity and differentiability - 10% weightage
• Co-ordinate geometry - 15% weightage
• Three Dimensional Geometry - 6% weightage
• Vector Algebra - 5% weightage
• Statistics and Probability - 8% weightage

You can focus on this subject more but don't rely entirely on this since the questions pattern changes every year.

To have some useful tips you can visit the link below:

https://engineering.careers360.com/articles/how-prepare-for-jee-main

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

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 :-

@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

@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

You can download different previous year's question papers and sample papers of JEE-Main from the link given below :-

https://engineering.careers360.com/articles/jee-main-sample-papers

https://engineering.careers360.com/articles/jee-main-question-paper

You can also check out our JEE-Main Learner's program which  includes the full length Mock test series  and you check out this from the link given below :-

https://learn.careers360.com/knockout-jee-main-april/?product=27

NTA has also given the facility for mock test which you can give from the link given below :-

https://nta.ac.in/Quiz

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!!