• Chemical Bonding.
• Periodic table.
• Carbonyl Compounds and their derivatives.
• Redox reactions, Mole Concept and the concept of equivalents.
• Solid state, solutions and gases theory.
• Thermochemistry and the Second Law of Thermodynamics.
• I would recommend you to go through eady chapters first like polymers environmental chemistry biomolecule there will be a sure shot question from these chapters

Dear Aspirant

Here are some important topics related to Jee mains.

Atomic structure

Mole concpet

States of matter

Thermodynamics

Equilibrium

Chemical bonding

Some basic principles of organic chemistry

Biomolecules

Inorganic Chemistry

Block elements (alkali and alkaline earth metals)

P Block elements group 13 to group 18 elements

You can visit the link mentinoned below for more details

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-syllabus/amp

Thank you
ALL THE VERY BEST