Hey Krish,

I am listing few topics below which you can refer for getting 80+ in JEE chemistry. But with that I would personally suggest that you should know everything whatever given in the NCERT books, because that is the real key to crack JEE. Try to understand all the small concepts which has been provided there. Questions are all concept based basically. Solve as many numerical as you can.

• Electrochemistry
• Chemical Kinetics
• Atomic Structure
• Alkanes, Alkenes and Alkynes ( Hydrocarbons)
• p Block Elements
• Coordination Compounds
• Biomolecules and Polymers
• d and f Block elements
• Solid State and Solutions
• Chemical Bonding and Molecular Structure
• s Block elements ( Alkali and Alkaline earth Metals) and Hydrogen

Hope it is helpful.

Best Wishes.

Regards.