Hello. Here is a breakdown of the important topics in each subject:-

Maths

1. Algebra ( Matrices and Probability)
2. Calculus
3. Vector Algebra
4. Coordinate Geometry
5. Trigonometry

Physics

1. Thermodynamics
2. Current Electricity
3. Optics
4. Electrostatics
5. Oscillations

Chemistry

1. Organic Chemistry ( Hydrocarbons and GOC )
2. Chemical Bonding
3. p-Block elements
4. Atomic Structure
5. Thermodynamics