Hello!

Here are the most important and most weightage chapters in JEE mains:

1.Physics : Laws of Motion,Work, Power and  Energy, rotational motion, Thermodynamics , Current Electricity, Electrostatics and Semiconductor Electronics.

2. Chemistry: Atomic Structure and Chemical Bonding, Chemical and Ionic Equilibrium, Coordination Compounds,Thermodynamics and  Thermochemistry, Alcohols, Phenols and Ethers, p-block and Environmental Chemistry and Everyday Chemistry.

3. Mathematics : Sets, Relations & Functions, Complex Numbers, Quadratic Equations, Permutations & Combinations, Binomial Theorem, Limit, Continuity & Differentiability, Definite & Indefinite Integrals and  Probability.