Hello,

For Physics the topics with most weight-age are as follows:

Modern Physics

Thermodynamics

Electrostatics

Optics

Current and Electricity

Magnetism

For Chemistry it is :

Organic Chemistry

P block

Chemical Bonding

Thermodynamics

Coordination Compounds

Atomic Structure

And for mathematics the topics are:

Coordinate Geometry

Differential Calculus

Integral Calculus

3D and Vectors

Probabilty

Matrix and Determinant

For further information regarding the topic wise weight-age in JEE you can check this link. https://engineering.careers360.com/articles/jee-main-syllabus-weightage

All the Best.