Hello krishna,
Here is the some important topics
These 5 topics are important & easy and can help your score high marks very easily in the JEE:

Work, Energy and Power  Weightage: 5%
Electrostatics Weightage: 6%
Current Electricity  Weightage: 7%
Wave Optics  Weightage: 5%
Ray Optics  Weightage: 6%
Visit to link, where you can see all important topics and their weightage
https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-important-topics-books/amp

Good luck.

Hello Dear

There are few chapters in PCM domain which play the vital role in the scoring of a candidate in the entrance exam and from those topics the questions will be asked Thoroughly  inorder to check that below the link is given through which you can able to check that .

https://engineering.careers360.com/articles/jee-main-important-topics-books

https://engineering.careers360.com/articles/jee-advanced-2019

All the best

Hello,


Important topics for jee mains is given below:
Important Topics For JEE Main Chemistry:
p Block Elements
Coordination Compounds
Biomolecules and Polymers
d and f Block elements
Chemical Bonding and Molecular Structure
s Block elements ( Alkali and Alkaline earth Metals) and Hydrogen
Electrochemistry
Chemical Kinetics
Atomic Structure
Alkanes, Alkenes and Alkynes ( Hydrocarbons)
Important Topics For JEE Main Physics:
Properties of Matter and Fluid Mechanics
Electrostatics
Semiconductors and Communication System
Electromagnetic Induction and Alternating Current
Ray Optics
Magnetic Effects of Current
Laws of Thermodynamics
Current Electricity
Atomic Structure in Modern Physics
Important Topics For JEE Main Maths:
Trigonometrical Ratios, Functions and Identities
Sequences and Series (Progressions)
Vector
Permutation and Combination
Statistics
Parabola
Definite Integration
Circle
Indefinite Integration
Binomial Theorem
Quadratic Equations

• Important topics for advance can be checked oj link below:

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

• I hope this helps.

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