Hello,

AIIMS 2020 PCB Syllabus with their weightage is mentioned below-

Physics :-

Class XI includes the following

1. Physical world and measurement-3%
2. Kinematics-6%
3. Laws of Motion-7%
4. Work, Energy and Power-3%
5. Motion of System of Particles and Rigid Body-4%
6. Gravitation-3%
7. Properties of Bulk Matter-1%
8. Thermodynamics-7%
9. Behaviour of Perfect Gas and Kinetic Theory-1%
10. Oscillation & Waves-10%

Class XII includes the following

1. Electrostatics-7%
2. Current Electricity-7%
3. Magnetic Effect of Current & Magnetism-8%
4. Electromagnetic Induction & Alternating Current-4%
5. Electromagnetic Waves-4%
6. Optics-5%
7. Dual Nature of Matter and Radiation-4%
8. Atoms & Nuclei-5%
9. Electronic Devices-8%

Chemistry :-

Class XI includes the following

1. Basic Concepts of Chemistry-2%
2. Structure of Atom-3%
3. Classification of Elements & Periodicity in Properties-3%
4. Chemical Bonding and Molecular Structure-7%
5. States of Matter: Gases and Liquids-2%
6. Thermodynamics-6%
7. Equilibrium-6%
8. Redox Reactions-4%
9. Hydrogen-2%
10. s-Block Elements-4%
11. Some p-Block Elements-6%
12. Organic Chemistry: Basic Principles & Techniques-8%
13. Hydrocarbons-3%
14. Environmental Chemistry-1%

Class XII includes the following

1. Solid State-2%
2. Solutions-3%
3. Electrochemistry-1%
4. Chemical Kinetics-4%
5. Surface Chemistry-1%
6. Isolation of Elements-1%
7. p-Block Elements-6%
8. d- and f-Block Elements-4%
9. Coordination Compounds-6%
10. Haloalkanes and Haloarenes-2%
11. Alcohols, Phenols and Ethers-4%
12. Aldehydes, Ketones and Carboxylic Acids-5%
13. Organic Compounds containing Nitrogen-2%
14. Biomolecules-5%
15. Polymers-2%
16. Chemistry in Everyday Life-1%

Biology :-

1. Human Health Disease-7%
2. Photosynthesis-5%
3. Animal kingdom-5%
4. Ecosystem-5%
5. Cell-4%
6. Biological Classification-4%
7. Transport in plants-4%
8. Digestion and Absorption-4%
9. Sexual Reproduction in flowering plants-4%
10. Application of biotechnology-3%
11. Circulation of Body fluid-3%
12. Human reproduction-3%
13. Evolution-3%
14. Plant Kingdom-3%
15. Morphology of Flowering Plants-3%
16. Structural organisation in Animals-3%
17. Respiration in plants-3%
18. Neural control and coordination-3%
19. Molecular basis of Inheritance-3%
20. Cell Division-2%
21. Biotechnology Principles and Processes-2%
22. Environmental issues-2%
23. Excretory products and their elimination-2%
24. Chemical control and Integration-2%
25. Principles of Inheritance and variation-2%
26. The living world-2%
27. Strategies for enhancement in food Production-2%
28. Movement and Locomotion-1%
29. Microbes and Human welfare-1%
30. Anatomy of Flowering plants-1%
31. Biomolecules-1%
32. Mineral Nutrition-1%
33. Plant growth and Development-1%
34. Breathing and Exchange of Gases -1%
35. Reproduction in Organisms -1%
36. Reproductive health-1%
37. Organisms and Population -1%

For more details regarding this, you may consider going through the following article-

https://medicine.careers360.com/articles/aiims-mbbs-chapter-wise-weightage