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JEE mains syllabus for each of Physics, Chemistry and Mathematics is provided below:-

CHEMISTRY:-

Some basic concepts in chemistry

States of matter

Atomic structure

Chemical bonding and molecular structure

Chemical thermodynamics

Hydrocarbons

Chemistry in everyday life

Principles related to practical chemistry

Organic compounds containing halogens

Organic compounds containing oxygen

Solutions

Equilibrium

Redox reactions and electrochemistry

Chemical kinetics

Surface chemistry

Purification and characterisation of organic compounds

Organic compounds containing nitrogen

Polymers

Some basic principles of organic chemistry

Biomolecules

Classification of elements and periodicity in properties

Hydrogen

S Block elements (alkali and alkaline earth metals)

P Block elements group 13 to group 18 elements

d- and f - block elements

Co-ordination compounds

Environmental chemistry

General principles and processes of isolation of metals

MATHEMATICS:-

Mathematical induction

Permutations and combinations

Mathematical reasoning

Complex numbers and quadratic equations

Matrices and determinants

Sets, relations and functions

Limit, continuity and differentiability

Integral calculus

Statistics and probability

Trigonometry

Co-ordinate geometry

Three-dimensional geometry

Differential equations

Binomial theorem and its simple applications

Sequences and seriesVector algebra

PHYSICS:-

Physics and measurement

Rotational motion

Thermodynamics

Gravitation

Laws of motion

Oscillations and waves

Kinematics

Work, energy and power

Properties of solids and liquids

Electronic devices

Kinetic theory of gases

Current electricity

Communication systems

Electromagnetic induction and alternating currents

Magnetic effects of current and magnetism

Optics

Electromagnetic waves

Atoms and nuclei

Electrostatics

Dual nature of matter and radiation

For more details go through

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

With the help of syllabus of JEE Main you can plan your studies and focus on topics that will require more time and concepts which can be mastered easily.

Thankyou