Hello Aspirant,

The most important topic of IIT JAM in Chemistry are:-

Physical Chemistry:-

1. Solid State

2. Quantum Chemistry

3. Electrochemistry

4. Chemistry Kinetics

5. Thermodynamics

Inorganic Chemistry:-

1. Co-ordination Compounds

2. Chemical Bonding

3. Organometallic Compounds

4. Bio inorganic Chemistry

Organic Chemistry:-

1. Stereo Chemistry

2. Name Reactions

3. Reaction Mechanisms

4. Spectroscopy

All the best for exams!!