Here is a list of important topics for JEE mains and their respective weightages.
Percentage Co-Ordinate Geometry 17%
Vector/3-D Geometry 10%
Sets Relations, Mathematical Reasoning, Statistics 13%
Heat Thermodynamics 7%
Electrostatics Current Electricity 17%
Magnetics Electro Magnetic Induction 13%
Optics Waves 3%
Modern Physics 10%
Simple Harmonic Motion, Waves Elasticity 7%
Semi-Conductor Devices, Electromagnetic Waves and Principles of Communication 13%
Inorganic Chemistry- Classification of Elements and Periodicity in Properties, General Principles and Process of Isolation of Metals, Hydrogen, s - Block Elements (Alkali and Alkaline Earth Metals), Co-ordination Compounds, Environmental Chemistry to name few.
Organic Chemistry- Purification and Characterisation of Organic Compounds, Some Basic Principles of Organic Chemistry, Hydrocarbons,Organic Compounds Containing Oxygen, Organic Compounds Containing Nitrogen, Bio Moleculesetc.
Physical Chemistry- Some Basic concepts in Chemistry,States of Matter, Atomic Structure, Chemical Bonding and Molecular Structure,Chemical Thermodynamics, Equilibrium, Surface Chemistry,Chemical Kinetics and Redox Reactions and Electrochemistry.