hello aspirant,

It is very difficult to predict the marks as the number of questions keeps changing. If you have not studied inorganic chemistry then it;s fine, because most of questions asked in Chemistry paper in JEE mains comes from the Organic and Physical Chemistry part. You must attempt the organic and Physical Chemistry as they have a weightage equal to 30% and 35% respectively in JEE mains. Whereas, the inorganic c=part in chemistry paper is of 35% weightage, but you can leave this part as you can attempt both organic and physical.

Furthermore, the total weighatge of all chapters in all 3 subjects is listed down below for you reference :

PHYSICS :

Modern Physics:- 20 marks

Heat and Thermodynamics :- 12 marks

Optics:- 12 marks

Current Electricity :- 12 marks

Electrostatics :- 12 marks

Magnetics :- 8 marks

Unit, Dimension and Vector:- 4 marks

Kinematics :- 4 marks

Laws of motion :- 4 marks

Work, Power and Energy :- 4 marks

Centre Of Mass, Impulse and Momentum :- 4 marks

Rotation :- 4 marks

Gravitation :- 4 marks

Simple Harmonic Motion :- 4 marks

Solids and Fluids :- 4 marks

Waves :- 4 marks

Electromagnetics Induction and AC :- 4 marks

CHEMISTRY :

Transition Elements and Coordination Chemistry  :-  12 marks

Periodic table and Representative Elements :- 12 marks

Thermodynamics And Gaseous State:- 8 marks

Atomic Structure:- 8 marks

Chemical Bonding:- 8 marks

Chemical And Ionic Equilibrium:- 8 marks

Solid State And Surface Chemistry :- 4 marks

Nuclear Chemistry And Environment:- 8 marks

Mole Concept :- 4 marks

Redox Reaction :- 4 marks

Electrochemistry :- 4 marks

Chemical Kinetics:- 4 marks

Solution and Colligative Properties :- 4 marks

General Organic Chemistry:- 4 marks

Stereochemistry:- 4 marks

Hydrocarbon :- 4 marks

Alkyl Halides :- 4 marks

Carboxylic Acid and their Derivatives:- 4 marks

Carbohydrates,amino acid and Polymers :- 4 marks

Aromatic Compounds :- 4 marks

MATHEMATICS:

Coordinate Geometry  :-  20 marks

Limits, Continuity and Differentiability :- 12 marks

Integral Calculus :- 12 marks

Complex numbers and Quadratic Equation :- 8 marks

Matrices and Determinants :- 8 marks

Statistics and Probability :- 8 marks

Vector Algebra :- 8 marks

Sets, Relation and Function:- 4 marks

Permutations and Combinations :- 4 marks

Binomial Theorem and Its Application:- 4 marks

Sequences and Series:- 4 marks

Trigonometry :- 4 marks

Mathematical Reasoning :- 4 marks

Differential Equation :- 4 marks

Statics and Dynamics :- 4 marks

Differential Calculus :-  4  marks

Further, to know more about the JEE mains syllabus and percentage weighatge of all chapter in all subject, follow the below link :

https://engineering.careers360.com/articles/jee-main-syllabus-weightage

I hope that this will help.