Hello aspirant,

Though every chapter and topic is important in the NEET syllabus, here is a chapter-wise weightage you can focus on while preparing for NEET. They are considered relatively important than other chapters and have more questions based on them in the exam.

HERE IS THE CHAPTERWISE WEIGHTAGE-

PHYSICS-

Physical-world and measurement:- 2%
Kinematics:- 3%
Laws of Motion :- 3 %
Work, Energy and Power :- 4 %
System of Particles and Rotational Motion :- 5 %
Work, Energy and Power :- 4 %
Gravitation :- 2 %
Properties of Bulk Matter :-3 %
Thermodynamics :- 9 %
Behaviour of Perfect Gas and Kinetic Theory :- 3 %

Oscillation & Waves :- 3 %
Electrostatics :- %
Current Electricity :- 8 %
Magnetic Effect of Current & Magnetism :- 5 %
Electromagnetic Induction & Alternating Current :- 8 %
Electromagnetic Waves :- 5 %
Dual Nature of Matter and Radiation :- 6%
Atoms & Nuclei :- 3 %
Optics :- 10 %
Semiconductor Electronics :- 9 %

CHEMISTRY-

Basic Concepts of Chemistry :- 1 %
Structure of Atom :- 2 %
Classification of Elements & Periodicity in Properties :- 2%
Chemical Bonding and Molecular Structure :- 5 %
States of Matter: Gases and Liquids :- 2 %
Equilibrium :-6 %
Thermodynamics :- 8 %
Redox Reactions :- 3 %
s-Block Elements :- 2 %
Some p-Block Elements :- 2 %
Organic Chemistry: Basic Principles & Techniques :- 4 %
Hydrocarbons :- 3 %

Solid State :- 2 %
Solutions :- 5 %
Electrochemistry :- 2 %
Chemical Kinetics :- 3 %
Surface Chemistry :- 2 %
Isolation of Elements :- 2 %
p-Block Elements :- 5 %
d- and f-Block Elements :- 4 %
Coordination Compounds :- 9 %
Haloalkanes and Haloarenes :- 3 %
Alcohols, Phenols and Ethers :- 4 %
Aldehydes, Ketones and Carboxylic Acids :- 4 %

BIOLOGY-

Diversity of Living Organisms :- 14%
Structural Organisation in Plants & Animals :- 5 %
Cell: Structure and Function :- 9 %
Plant Physiology :- 6 %
Human Physiology :- 20 %
Reproduction:- 9 %
Genetics and Evolution:- 18 %
Biology and Human Welfare:- 9 %
Biotechnology and its Applications:-4%
Ecology and Environment:- 6 %

Here are some important book resources you can refer to and important topics list to ace your preparation- https://medicine.careers360.com/articles/neet-preparation-tips

Hope it helps!