Hello,

You can get more than 90 percentile in JEE through your hard work. You have to solve the numerical and previous year question papers. Read the chapters deeply that you feel tough. Revise your notes.

The important topics and chapters are:

Physics:

• Rotational Motion
• Thermodynamics
• SHM
• Electrostatics
• Magnetism
• 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 & thermochemistry
• Aldehydes and ketones
• Aromatic hydrocarbons
• GOC isomerism
• Liquid solutions
• Alkyl halides and aryl halides

Also, if you are targeting May session, then appear for the previous sessions i.e. march, April also. By, giving the previous sessions you can grasp the exam atmosphere, paper pattern, question style and the most of all the experience of giving the exam. This will really help you to succeed in the May session. Furthermore, stay healthy and don't panic.

You can get the previous year question papers from the link below

https://engineering.careers360.com/articles/jee-main-question-papers

Good luck!