Hello, as you know that IIT JEE main paper compromises of three subjects and they are Chemistry, Physics and Maths. Candidate have to clear cut-off of all the Subjects for passing this Exam

Here as per your demand here I am providing you IIT JEE main Chemistry Chapter/ Topic wise weightage marks

General Organic Chemistry 9%

Alcohol Phenol Ether 7%

Redox reactions 6%

Chemical Bonding 5%

Coordination Compound 5%

P-Block Elements 5%

S-Block Elements 5%

Aldehyde Ketone 5%

Solutions 5%

Solid State 5%

Chemical Thermodynamics 5%

Ionic Equilibrium 3%

Chemical Equilibrium 3%

Surface Chemistry 3%

Atomic Structure 2%

Gaseous State 2%

Transition Elements 2%

Polymers 2%

Nuclear Chemistry 2%

Chemical Kinetics 2%

Mole Concepts 2%

Amines and Diazonium Salts 2%

Biomolecules 2%

Alkanes, Alkenes and Alkynes2%

Electrochemistry 2%

Total 100%