Hello there hope you are doing well.Here I am listing down the important topics:

JEE Main Physics Syllabus

Work, Energy and Power

Electrostatics

Optics

Electromagnetic induction & alternating current

Physics and Measurements

Properties of Solids and Liquids

Magnetic effect of current and Magnetics

Communication Systems

Kinematics

Kinetic theory of gases

Electronic Devices

Oscillations & Waves

Thermodynamics

Electromagnetic waves

Rotational Motion

Dual Nature of matter and Radiation

Current Electricity

Atoms and Nuclei

Laws of motion

Gravitation

JEE Main Mathematics Syllabus

Integral Calculus

Complex Numbers and Quadratic Equations

Differential Equation

Vector Algebra

Binomial Theorem and its Simple Applications

Coordinate geometry

Permutation and combination

Mathematical Reasoning

Sequences and Series

Matrices and Determinants

Co-ordinate geometry of three dimensions

Mathematical Induction

Statistics and Probability

Limit, Continuity and Differentiability

Trigonometry

Sets, Relations and Functions

JEE Main Chemistry Syllabus

Physical Chemistry

Redox Reactions and Electrochemistry

States of Matter

Chemical Thermodynamics

Some Basic Concepts in Chemistry

Equilibrium

Atomic Structure

Chemical Bonding and Molecular Structure

Solutions

Chemical Kinetics

Surface Chemistry

Inorganic Chemistry

Block Metals

General Principles and Processes of Isolation of Metals

Environmental Chemistry

Classification of Elements and Periodicity in properties

Coordination Compounds

Hydrogen

Block Metals

Organic Chemistry

Organic Compounds Containing Halogens

Purification and Characterization of Organic Compounds

Polymers

Chemistry in Everyday Life

Some Basic Principles of Organic Chemistry

Principles Related to Practical Chemistry

Organic Compounds Containing Oxygen

Organic Compounds Containing Nitrogen

Hydrocarbons

Biomolecules

Feel free to ask me in the comment box if you are having any further doubts

hope you find it helpful

Good Luck!

Hello dear aspirant.

This year there will be certain changes in exam pattern like earlier there were 90 questions 30 from each subject this year only 75 and 25 from from each subject. 20 questions per subject will be objective and five will be numerical values  answer type question.

Ok good luck