Hello Asprint,
Most important topics for jee mains are

High weightage CHEMISTRY
1.Atomic structures
2.Gaseous and liquids
3.Electro chemistry
4.chemical kinetics
5. Nuclear and surface chemistry
6. Chemical bonding & d block elements
7.co oridinate compound
8. Co ordinate compound & Alkali halides
9. Thermodynamics,P block elements & General organic chemistry
10. Isomerism,Aldehydes and ketones.

High weightage PHYSICS
1. Heat & Thermodynamics
2. Ray optics & Electro magnetic waves
3. Semiconductor & wave optics
4. Gravitation
5. Photoelectric effect ,Rotation,Kinematics& Electro statics.
6. Current Electricity & capacitor
7. Properties of matter
8. Magnetic effect of current & magnetism
9. Bohrs atomic model
10. Waves & sound.

HIGH WEIGHTAGE MATHEMATICS
1. 3dimensional geometry & vectors
2. Determinant and matrices
3. Sequence and series
4. Straight line & circle
5. Probability distribution
6. Definite integrals & Area under the curve
7. Limits,continuity, Differentiability
8. Application of derivatives & conic sections
9. complex numbers & quadratic equations
10. Binomial theorem.
Hope this information helps you!!
Good Luck.
For more information visit the link below:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/articles/most-important-chapters-of-jee-main-2020/amp&ved=2ahUKEwj637L13fHqAhUtIbcAHZTWBzkQFjASegQICBAB&usg=AOvVaw37wLQ0xA8_ChGXEzGTxUeb&ampcf=1&cshid=1596001583651

Hello,

Here I am listing the most Important topic that you should study well for JEE Mains -

Important topics in Physics -

1. Rotational Motion

2. Thermodynamics

3. SHM

4. Electrostatics

5. Magnetism

6. Optics

7. Modern Physics

Important topics in Mathematics -

1. Complex Number

2. Conic Section

3. Circle

4. Calculus

5. Vetor & 3 D

6. Probability

7. Trigonometric Equation

8. Properties of triangles

9. Quadratic equations

10. Sequence and Series

11. Permutations and combination

Important topics in Chemistry -

1. Chemical bonding

2. Electrochemistry

3. Coordination compound

4. Salt analysis

5. Ionic equilibrium

6. Thermodynamics and thermochemistry

7. Aldehydes and ketones

8. Aromatic hydrocarbons

9. GOC isomerism

10. Liquid solutions

11. Alkyl halides and aryl halides

Hope you will find this answer useful,

All the best!

Hey! Every topic in the JEE Mains syllabus is important, JEE Mains paper can ask anything from the syllabus, the difference is that some topics have more weightage and some have less weightage as per exam point of view. So prepare wisely don't look for important topics cover all the topics. You can have a list of topics with their weightage from official website. Hope this may help you.

Going by the analysis of previous years examination papers, the experts have designed weightage of each topic in each subject for JEE Mains, Hope this helps:

In Physics, Modern Physics take the top slot with 5 questions. Heat and Thermodynamics, Optics, Current Electricity, Elcetrostatics get 3 questions each. Magnetic has 2 questions and the rest get 1 question each.

In Chemistry, Transition Elements and Coordination Chemistry, Periodic Table and Representative elements take 3 questions slot. Thermodynamics and Gaseous state, Atomic structure, Chemical Bonding, Chemical and Iconic Equilibrium, Solid State and Surface Chemistry and Nuclear Chemistry and Environment get 2 questions slot eacch and the remaining get 1 question each.

In Mathematics, Co-ordinate Geometry gets 5 questions. Limits, Continuity and Differentiability, Integral Calculus get 3 questions slot each. The rest get 2 and 1 questions slot. For complete breakdown, please read our article: https://engineering.careers360.com/articles/jee-main-syllabus-weightage .

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