Chapter wise Important Topics and Mark allotments for NEET 2021 – Physics, Chemistry, Biology


NEET is a highly competitive entrance exam with over 15 lakh candidates attending every year. This article explains to you in detail the Chapter Wise topics according to priority and mark allotment for the National Eligibility cum Entrance Test – 2021(NEET exam). It also helps the candidates by guiding them in analysing the importance of a chapter/unit based on its weightage. Candidates who wish to apply for NEET 2021 can go through this article to score good marks in the exam.


Exam Pattern for NEET 2021


Candidates must be aware of the exam pattern in order to plan a proper study plan accordingly. Below is the exam pattern for NEET 2021 exam.



Particulars Details
Pattern of Examination Pen and paper-based
Duration of Examination 3 hours
Total Number of Questions 180 Questions
Sections Physics – 45 Questions

Chemistry – 45 Questions

Biology – 90 Questions

Marking Scheme +4 marks for each correct answer;

-1 mark for each wrong answer;

0 mark for each unanswered question

Maximum NEET 2021 Marks 720 marks
Aggregate score calculation Total number of correct answers X 4 – Total number of incorrect answers X 1

(Note: There are no marks for attempting of questions)



Chapter-wise important topics and mark allotment in NEET exam


Weightage of chapters in NEET 2021 – Physics


The NEET 2021 question paper consists of 45 questions from Physics. The following is the chapter wise weightage of all units of Class 11 and 12 Physics for NEET.


Class XI
Unit Topic / Chapters Weightage*
I Physical-world and measurement 2%
Chapter–1: Physical World
Chapter–2: Units and Measurements
II Kinematics 3%
Chapter–3: Motion in a Straight Line
Chapter–4: Motion in a Plane
III Laws of Motion 3%
Chapter–5: Laws of Motion
IV Work, Energy and Power 4%
Chapter–6: Work, Energy and Power
V Motion of System of Particles and Rigid Body 5%
Chapter–7: System of Particles and Rotational Motion
VI Gravitation 2%
Chapter–8: Gravitation
VII Properties of Bulk Matter 3%
Chapter–9: Mechanical Properties of Solids
Chapter–10: Mechanical Properties of Fluids
Chapter–11: Thermal Properties of Matter
VIII Thermodynamics 9%
Chapter–12: Thermodynamics
IX Behaviour of Perfect Gas and Kinetic Theory 3%
Chapter–13: Kinetic Theory
X Oscillation & Waves 3%
Chapter–14: Oscillations
Chapter–15: Waves
Class XII
Unit Topic / Chapters Weightage*
I Electrostatics 9%
Chapter-1: Electric Charges and Fields
Chapter-2: Electrostatic Potential and Capacitance
II Current Electricity 8%
Chapter-3: Current Electricity
III Magnetic Effect of Current & Magnetism 5%
Chapter-4: Moving Charges and Magnetism
Chapter-5: Magnetism and Matter
IV Electromagnetic Induction & Alternating Current 8%
Chapter-6: Electromagnetic Induction
Chapter-7: Alternating Current
V Electromagnetic Waves 5%
Chapter-8: Electromagnetic Waves
VI Optics 10%
Chapter-9: Ray Optics and Optical Instruments
Chapter-10: Wave Optics
VII Dual Nature of Matter and Radiation 6%
Chapter-11: Dual Nature of Radiation and Matter
VIII Atoms & Nuclei 3%
Chapter-12: Atoms
Chapter-13: Nuclei
IX Electronic Devices 9%
Chapter-14: Semiconductor Electronics
Total 100%







Weightage of chapters in NEET 2021 – Chemistry


The NEET 2021 exam will consist of 45 questions from chemistry. The Chemistry chapter wise priorities for NEET 2021 in the units of Class 11 and 12 is provided below.


Class XI
Unit Topic / Chapters Weightage*
I Basic Concepts of Chemistry 1%
II Structure of Atom 2%
III Classification of Elements & Periodicity in Properties 2%
IV Chemical Bonding and Molecular Structure 5%
V States of Matter: Gases and Liquids 2%
VI Thermodynamics 8%
VII Equilibrium 6%
VIII Redox Reactions 3%
IX Hydrogen 2%
X s-Block Elements 2%
XI Some p-Block Elements 2%
XII Organic Chemistry: Basic Principles & Techniques 4%
XIII Hydrocarbons 3%
XIV Environmental Chemistry 2%

Class XII

Unit Topic / Chapters Weightage*
I Solid State 2%
II Solutions 5%
III Electrochemistry 2%
IV Chemical Kinetics 3%
V Surface Chemistry 2%
VI Isolation of Elements 2%
VII p-Block Elements 5%
VIII d- and f-Block Elements 4%
IX Coordination Compounds 9%
X Haloalkanes and Haloarenes 3%
XI Alcohols, Phenols and Ethers 4%
XII Aldehydes, Ketones and Carboxylic Acids 4%
XIII Organic Compounds containing Nitrogen 2%
XIV Biomolecules 3%
XV Polymers 3%
XVI Chemistry in Everyday Life 2%
Total 100%



Weightage of chapters in NEET 2021 – Biology


The biology section contains the highest mark weightage in NEET exam and it consists of 90 questions. Given below is the unit wise weightage of biology in NEET 2021.


Class XI
Unit Topic / Chapters Weightage*
I Diversity of Living Organisms 14%
Chapter-1: The Living World
Chapter-2: Biological Classification
Chapter-3: Plant Kingdom
Chapter-4: Animal Kingdom
II Structural Organisation in Plants & Animals 5%
Chapter-5: Morphology of Flowering Plants
Chapter-6: Anatomy of Flowering Plants
Chapter-7: Structural Organisation in Animals
III Cell: Structure and Function 9%
Chapter-8: Cell-The Unit of Life
Chapter-9: Biomolecules
Chapter-10: Cell Cycle and Cell Division
IV Plant Physiology 6%
Chapter-11: Transport in Plants
Chapter-12: Mineral Nutrition
Chapter-13: Photosynthesis in Higher Plants
Chapter-14: Respiration in Plants
Chapter-15: Plant – Growth and Development
V Human Physiology 20%
Chapter-16: Digestion and Absorption
Chapter-17: Breathing and Exchange of Gases
Chapter-18: Body Fluids and Circulation
Chapter-19: Excretory Products and Their Elimination
Chapter-20: Locomotion and Movement
Chapter-21: Neural Control and Coordination
Chapter-22: Chemical Coordination and Integration
Class XII
Unit Topic / Chapters Weightage
VI Reproduction 9%
Chapter-1: Reproduction in Organisms
Chapter-2: Sexual Reproduction in Flowering Plants
Chapter-3: Human Reproduction
Chapter-4: Reproductive Health
VII Genetics and Evolution 18%
Chapter-5: Principles of Inheritance and Variation
Chapter-6: Molecular Basis of Inheritance
Chapter-7: Evolution
VIII Biology and Human Welfare 9%
Chapter-8: Human Health and Diseases
Chapter-9: Strategies for Enhancement in Food Production
Chapter-10: Microbes in Human Welfare
IX Biotechnology and its Applications 4%
Chapter-11: Biotechnology – Principles and Processes
Chapter-12: Biotechnology and its Application
X Ecology and Environment 6%
Chapter-13: Organisms and Populations
Chapter-14: Ecosystem
Chapter-15: Biodiversity and its Conservation
Chapter-16: Environmental Issues
Total 100%