Hello Abhinav Abhi,

Theis are the subjects must be completed for good score in jee mains.

PHYSICS: - Electrodynamics,Mechanics,Modern Physics,Heat & Thermodynamics
SHM & Waves Optics.
MATHEMATICS : - Differential Calculus,Integral Calculus,Coordinate Geometry
Co-ordinate Geometry (3-D),Matrix & Determinants,Probability,Matrix & Determinants,Trigonometry.
CHEMISTRY:- Organic Chemistry-II [Alkyl Hallide, Alcohol & Ether ,Aromatic Compounds, Biomolecules,Carbohydrates, Amino Acids and Polymers, Carbonyl Compounds, Environmental chemistry, Grignard Reagent, Reduction, Oxidation& Hydrolysis]

Physical Chemistry-I [Atomic Structure & Nuclear Chemistry,Ionic Equilibrium, Mole Concept,Thermodynamics and Thermochemistry]

Physical Chemistry-II [Chemical Kinetics,Electrochemistry,Solid State,Solution & Colligative Properties,Surface Chemistry],

Inorganic Chemistry-I [Chemical Bonding,Periodic Table & Periodicity in Properties,S-Block]

Hope this help you..