As the entire 11-12th syllabus is important but it would be better if you could learn the below provided topics very well.



Physics

EMI, AC, Magnetism, Electrostatics, Ray and Wave etc.



Chemistry



1.Thermodynamics and Equilibrium

2.Electro chemistry

3.Coordination Compounds

4.kinetics,solutions & Bonding

5.Organic Chemistry

6.Biomolecules

also study the compounds of p and d block elements



Biology



1.Genetics and Biotechnology , don't forget to study restriction mapping not in NCERT

2.Neural control , hormonal control , Circulation , Photosynthesis, Respiration

3.Evolution and read ecology from ncert

4.Cell cycle and division

5.Human diseases cure and symptoms





Hope this helps!!!