If you asking for JEE/NEET succh competitive entrance examinations, then enlisting them down isnt possible since they are national level examinations so the questions will be tricky in themselves, Yes important topics can be mentioned. Do solve some decent MCQs for the same maybe from MTG NEET CHAMPION or ARIHANT or some other decent mcq books of chemistry.

1. Coordination Chemistry
2. Nature of organic bonds
3. D,F block
4. Periodic table
5. Redox reactions

Do check out our knockout pages for JEE and NEET, they provide online video lectures to clear all your concepts, doubts solving sessions and also conduct weekly tests and mock tests too and many more.

NEET - https://learn.careers360.com/knockout-neet-may/

JEE - https://learn.careers360.com/knockout-jee-main-april/

Best wishes. Thank you..