What are the important chapters for jee advance and their weightage?according to the subject wise.

Physics:

Kinematics

Law of Motion

Work Power Energy

Rigid Body Dynamics and Rational Motion

Fluid Mechanics

Heat and Thermodynamics

Kinetic Theory of Gases

Waves and Oscillations

Electrostatics

Magnetism

Current Electricity

Optics

Modern Physics

Alternating Current and Electromagnetic Induction

Chemistry:

Mole Concept

Atomic Structure

Periodicity

Chemical and Molecular Bonding

States of Matter

Electro chemistry and Redox reactions

Chemical and Ionic Equilibrium

General Organic Chemistry

Hydrogen

Solutions and Colligative Properties

Chemical Kinetics

Coordination compounds

P block , D&F block elements

Metallurgy

Mathematic

Relations and functions

Trigonometric Functions

Complex Numbers

Binomial Theorem

Sequences and Series

Straight lines and Family of lines

Conic Sections

Statistics

Matrices and Determinants

Limits Continuity and Differentiation

Application of Derivatives

Definite Integration

Vectors and 3D

Differential Equation

Probability

Quadratic Equations

Every year weightage changes and better you practise in time bound manner.

Hope I helped you.All the best for future endeavour!!