Important Chapters for JEE Main 2020
The first thing to know is that NTA does not allocate any weightage to any chapter and you should try to learn and understand all chapters of all subjects. You should have a complete understanding of all the concepts and formulae of all the chapters and topics. You must have all the concepts on your tips. Once you have conceptual clarity of the important topics, you should practice questions based on the important chapters for JEE Main. By following this way, you will be able to target the maximum marks without worrying about all the chapters. More importantly, if the students have complete command over these important chapters, they are destined to score great marks in the JEE exam.
After analysing the pattern of the past years' question papers of JEE Main, subject experts have prepared a list of the important chapters.
*Also, these chapters have been categorised into 4 different categories based on the number of efforts needed to learn and score in the exam along with the weightage of the chapters.
Category 
Output (Weightage of chapters in exam) 
Input (Amount of efforts needed to learn these chapters and chances of scoring in exam) 
Category 1 
High output 
Low input 
Category 2 
High output 
High input 
Category 3 
Low output 
Low input 
Category 4 
Low output 
High input 
The important units/chapters of Mathematics based on their weightage in the exam are given below:
Chapters 
Weightage (%) 
Average number of questions asked from the chapters 
Category (Based on efforts needed to score vs. weightage) 
Limit, Continuity and Differentiability 
5 % 
2 
Category 2 
Application of Derivatives 
7 % 
2 
Category 2 
Differentiation 
3 % 
1 
Category 3 
Straight Line 
4 % 
1 
Category 1 
Conic Section 
10 % 
3 
Category 2 
Statistics and Probability 
9 % 
2 

Vector and 3D 
9 % 
3 
Category 1 
Matrix and Determinants 
7 % 
2 
Category 1 
Sequence and Series 
7 % 
2 
Category 1 
Trigonometry 
6 % 
2 
Category 2 

4 % 
1 
Category 2 
Integral Calculus 
12 % 
3 
Category 2 
Complex Number 
3 % 
1 
Category 4 
Binomial Theorem 
3 % 
1 
Category 4 
Sets and Relations 
2 % 
1 
Category 3 
Functions 
4 % 
1 
Category 3 
Permutation and Combination 
3 % 
1 
Category 4 
Mathematical Reasoning 
2 % 
1 
Category 3 
Total 
100 % 
30 

The important units/chapters of Physics based on their weightage in the exam are given below:
Chapters 
Weightage (%) 
Average number of questions asked from the chapters 
Category (Based on efforts needed to score vs. weightage) 
Modern Physics 
15 % 
5 
Category 2 
Optics 
9 % 
3 
Category 1 
Heat and Thermodynamics 
9 % 
3 
Category 1 
Electrostatics 
7 % 
2 
Category 2 
Current Electricity 
7 % 
2 
Category 1 
Gravitation and Rotational Mechanics 
8 % 
2 
Category 2 
Magnetics 
7 % 
2 
Category 2 
Kinematics 
4 % 
1 
Category 4 
Units, Dimensions, Errors and Experiments 
5 % 
1 
Category 3 
Waves and Oscillation 
4 % 
2 
Category 1 
EMI and AC 
6 % 
1 
Category 2 
Solids and Fluids 
6 % 
1 
Category 2 
Laws of motion 
3 % 
1 
Category 4 
System of Particles 
4 % 
2 
Category 2 
Work, Energy and Power 
3 % 
1 
Category 3 
Semiconductor and Communication 
3 % 
1 
Category 1 
Total 
100 % 
30 

The important units/chapters of Chemistry based on their weightage in the exam are given below
Chapters 
Weightage (%) 
Average number of questions asked from the chapters 
Category (Based on efforts needed to score vs. weightage) 
Physical Chemistry 



Basic Concepts of Chemistry 
4 % 
2 
Category 2 
Atomic Structure 
3 % 
1 
Category 1 
Ionic Equilibrium and Chemical Equilibrium 
5 % 
2 
Category 3 
Thermodynamics and Thermochemistry 
6 % 
2 
Category 2 
Electrochemistry 
4 % 
1 
Category 1 
Surface Chemistry 
4 % 
1 
Category 1 
Chemical Kinetics 
2 % 
1 
Category 1 
Solutions 
5 % 
1 
Category 3 
States of Matter 
3 % 
1 
Category 3 




Inorganic Chemistry 



Chemical Bonding 
5 % 
2 
Category 1 
dblock and fblock 
3 % 
1 
Category 1 
pblock 
6 % 
1 
Category 2 
Coordination Compounds 
7 % 
2 
Category 1 
sblock 
5 % 
1 
Category 4 
Environmental chemistry 
2 % 
1 
Category 3 




Organic Chemistry 



GOC 
5 % 
2 
Category 2 
Hydrocarbons 
4 % 
1 
Category 3 
Biomolecules and Polymers 
6 % 
1 
Category 4 
Practical Organic Chemistry 
4 % 
1 
Category 2 
Organic Compounds Containing Halogens 
5 % 
2 
Category 1 
Organic Compounds Containing Nitrogen 
5 % 
1 
Category 1 
Organic Compounds Containing Oxygen 
7 % 
2 
Category 2 
Total 
100 % 
30 

*Note: From 2020, JEE Main will have only 25 questions from each subject. So, the number of questions asked from any of these chapters can be changed.
Remarks: Based on these observations, you can identify on which topic to achieve your goal. It will help you to decide, how much time you need to allot to each chapter according to your current understanding of that chapter.