Hi Raj,

The important chapters for JEE-Advanced 2020 are listed below:-

@Physics

• Rotational Motion
• Thermodynamics
• SHM
• Electrostatics
• Optics
• Modern Physics

@Mathematics

• Complex Number
• Conic Section
• Circle
• Calculus
• Vector & 3 D
• Probability
• Trigonometric Equation
• Properties of Triangles
• Quadratic Equation
• Sequence and Series
• Permutations and combination

@Chemistry

• Chemical bonding
• Electrochemistry
• Coordination compound
• Salt analysis
• Ionic equilibrium
• Thermodynamics
• Aldehydes and ketones
• Aromatic hydrocarbons
• GOC isomerism
• Liquid solutions
• Alkyl halides and aryl halides

Refer here for more info - https://news.careers360.com/jee-advanced-chapterwise-weightage-check-important-topics-for-jee-advanced

To know your other best admission possibilities of Institutes & branches in JOSSA & State counseling as per your percentile, You can use JEE Main College Predictor tool given below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!