Hi aspirant,

Generally National testing agency tries to give equal weights to all the topics in the JEE main and advanced examination but there are certain topics which are frequently asked and thus become important. Following below are a few of the important topics from each of the subjects:

Physics

• Newton's laws of motion
• Work ,power and energy
• Rotational mechanics
• Friction
• Fluid dynamics
• Electrostatics complete unit
• AC
• Semiconductors and devices

Mathematics

• Complex numbers
• Sequence and series
• Binomial theorem
• Conic sections
• Differentiation
• Integral calculus
• Permutations and combinations
• Vector calculus

Chemistry

• General organic chemistry
• Hydrocarbons
• Aldehydes ketones and carboxylic acids
• Alcohol phenol and ethers
• Thermodynamics
• Chemical kinetics
• Coordinate chemistry
• Surface chemistry

Hope it helps!