Hello!

11th syllabus are the game changers of JEE Mains. You will literally have 1/2 of the paper from class 11 syllabus. I can help you with important lessons. Maths important chapters are sets, relations and functions, mathematical reasoning, conics, permutations and combinations, complex numbers, quadratic equations and sequence and series. For physics gravitation, optics, thermodynamics, rotational motion, work energy and power, Newton law, oscillation, waves. For chemistry each and lesson is important.

All the best. Hope the answer was helpful.

Thank You

hi,

to tell the truth if your 11th study is not good you would face serious issue while studying 12th course , in science all concepts are related with each others, if you have not study chemical bonding which are in 11th syllabus, it would be difficult to  study Aldehydes and ketones, Aromatic hydrocarbons. however you may follow the below link to know about most Important chapters of Physics, chemistry and mathematics,

https://engineering.careers360.com/articles/most-important-chapters-of-jee-main

Hello aspirant!

Important topics from Physics- Kinematics(1and 2 dimensional motion), Waves and Oscillation, Rotational motion is pretty important, Thermodynamics

Important topics from Chemistry- Chemical Bonding, p block elements, Hydrocarbons and Reaction mechanism, Environmental chemistry

Important topics from maths- 3D geometry, binomial theorem, differential equations, matrices