Dear Mohit,

It is difficult to tell easy chapters as it depends on person to person.

You can check important topics for JEE Advanced which carry more weightage in the exam below

Mathematics

- Calculus

- Co-ordinate geometry

- Vectors and 3D geometry

- Algebra (Hard to prepare)

- Probability

- Trigonometry

Physics

-Mechanics

- Electrostatics, Current electricity, and Magnetism

- Optics and Modern Physics

- Experiments

Chemistry

- Physical Chemistry

-Organic Chemistry

- Named Reactions

- Inorganic Chemistry

To score good marks make sure you refer previous year papers to understand the level of the exam and as JEE Advanced is  a online test so you should solve as many as mock test series for your practice.

All the Best!!