JEE Mains covers Physics, Chemistry, and Mathematics with specific weightage for each topic. Some high-weightage topics include Laws of Motion, Thermodynamics, and Modern Physics in Physics. Organic Chemistry, Coordination Compounds, and Chemical Bonding in Chemistry. Coordinate Geometry, Calculus, and Probability in Maths. Solving topic-wise previous year questions helps identify important patterns, Many online platforms, such as Careers360, and books like References by SL Arora and Pradeep, will help you a lot in Physics and Chemistry.