NEET Chapter Wise Weightage 2026 — Physics, Chemistry, Biology
Complete chapter-wise weightage for NEET 2026 based on 5-year paper analysis. Know which chapters carry the most marks in Biology, Physics, and Chemistry.
Human Physiology and Genetics & Evolution are the two highest-weightage units in NEET, carrying 40–48 marks each. In Chemistry, Physical Chemistry dominates with 60–68 marks. In Physics, Mechanics alone accounts for 52–60 marks. This analysis is based on NEET papers from 2019–2025 to help you prioritise chapters for maximum impact.
Biology — Chapter Wise Weightage (360 marks)
Biology is 50% of NEET. Every mark here counts double because 85% of questions come directly from NCERT.
Botany (180 marks — 45 questions, attempt 40)
| Unit / Chapter | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| Plant Diversity (Classification, Plant Kingdom) | 3–4 | 12–16 | Must Do |
| Plant Morphology & Anatomy | 3–4 | 12–16 | Must Do |
| Cell Biology (Cell Structure, Division) | 4–5 | 16–20 | Must Do |
| Biomolecules | 2–3 | 8–12 | High |
| Plant Physiology (Photosynthesis, Respiration, Growth) | 5–6 | 20–24 | Must Do |
| Reproduction in Plants | 2–3 | 8–12 | High |
| Genetics (Mendelian, Molecular Biology) | 5–6 | 20–24 | Must Do |
| Biotechnology (Principles + Applications) | 3–4 | 12–16 | High |
| Ecology & Environment | 5–6 | 20–24 | Must Do |
Zoology (180 marks — 45 questions, attempt 40)
| Unit / Chapter | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| Animal Diversity (Classification, Animal Kingdom) | 3–4 | 12–16 | Must Do |
| Structural Organisation in Animals | 2–3 | 8–12 | High |
| Human Physiology (Digestion, Respiration, Circulation, Excretion, Neural, Locomotion) | 10–12 | 40–48 | Must Do |
| Human Reproduction & Reproductive Health | 3–4 | 12–16 | Must Do |
| Genetics & Evolution | 5–6 | 20–24 | Must Do |
| Biology in Human Welfare (Health, Immunity, Microbes) | 3–4 | 12–16 | High |
Key insight: Human Physiology alone carries ~45 marks — more than any single Physics or Chemistry unit. This should be your strongest chapter.
Chemistry — Chapter Wise Weightage (180 marks)
Physical Chemistry (~60–68 marks)
| Chapter | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| Mole Concept & Stoichiometry | 1–2 | 4–8 | Must Do |
| Atomic Structure | 1–2 | 4–8 | Must Do |
| Chemical Bonding | 2 | 8 | Must Do |
| Thermodynamics | 1–2 | 4–8 | Must Do |
| Equilibrium | 2 | 8 | Must Do |
| Electrochemistry | 1–2 | 4–8 | High |
| Chemical Kinetics | 1–2 | 4–8 | High |
| Solutions | 1 | 4 | High |
| Solid State & Surface Chemistry | 1–2 | 4–8 | Medium |
| States of Matter | 1 | 4 | Medium |
Organic Chemistry (~56–64 marks)
| Chapter | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| GOC (General Organic Chemistry) | 1–2 | 4–8 | Must Do |
| Hydrocarbons | 1–2 | 4–8 | Must Do |
| Haloalkanes & Haloarenes | 1 | 4 | High |
| Alcohols, Phenols, Ethers | 1–2 | 4–8 | High |
| Aldehydes, Ketones, Carboxylic Acids | 2 | 8 | Must Do |
| Amines | 1 | 4 | High |
| Biomolecules & Polymers | 1–2 | 4–8 | Medium |
| Chemistry in Everyday Life | 1 | 4 | Low (easy) |
Inorganic Chemistry (~52–60 marks)
| Chapter | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| p-Block Elements | 3–4 | 12–16 | Must Do |
| d-Block & f-Block Elements | 2–3 | 8–12 | Must Do |
| Coordination Compounds | 2 | 8 | Must Do |
| s-Block Elements | 1 | 4 | High |
| Periodic Table & Properties | 1–2 | 4–8 | High |
| Metallurgy | 1 | 4 | Medium |
| Hydrogen & Environmental Chemistry | 1 | 4 | Low |
Chapter-wise NEET practice
Super Tutor has NCERT-based MCQs sorted by chapter and difficulty level — focus on high-weightage topics first and track your improvement.
Practise NEET Chapters — FreePhysics — Chapter Wise Weightage (180 marks)
| Chapter / Unit | Avg. Questions | Marks Range | Priority |
|---|---|---|---|
| Mechanics (Kinematics, NLM, WEP, Rotational, Gravitation, Properties of Matter) | 13–15 | 52–60 | Must Do |
| Electrostatics & Current Electricity | 5–6 | 20–24 | Must Do |
| Magnetism & EMI | 3–4 | 12–16 | Must Do |
| Optics (Ray + Wave) | 3–4 | 12–16 | Must Do |
| Modern Physics & Semiconductors | 3–4 | 12–16 | High |
| Thermodynamics & KTG | 2–3 | 8–12 | High |
| Waves & Oscillations | 2–3 | 8–12 | High |
| AC & EM Waves | 1–2 | 4–8 | Medium |
| Units, Measurements & Errors | 1 | 4 | Easy marks |
Key insight: Mechanics dominates NEET Physics even more than JEE Main — ~35% of Physics marks. Master Mechanics and you are already strong in Physics.
Top 10 Highest-Weightage Units Across All Subjects
| Rank | Unit | Subject | Marks |
|---|---|---|---|
| 1 | Physical Chemistry (combined) | Chemistry | 60–68 |
| 2 | Organic Chemistry (combined) | Chemistry | 56–64 |
| 3 | Mechanics (combined) | Physics | 52–60 |
| 4 | Inorganic Chemistry (combined) | Chemistry | 52–60 |
| 5 | Human Physiology | Zoology | 40–48 |
| 6 | Genetics & Evolution | Biology | 40–48 |
| 7 | Ecology & Environment | Botany | 20–24 |
| 8 | Plant Physiology | Botany | 20–24 |
| 9 | Electrodynamics | Physics | 20–24 |
| 10 | Cell Biology | Botany | 16–20 |
How to Use This Data
- Start with "Must Do" chapters — they cover ~65% of the paper and are the foundation of your preparation.
- Biology gets 50% of your study time — it carries 50% of marks and is the most scoring (NCERT-based).
- Do not ignore low-weightage chapters — they often have the easiest questions. Environmental Chemistry, Chemistry in Everyday Life, and Units & Measurements are almost free marks.
- Revise in order of weightage — when time is limited, always revise Human Physiology, Genetics, and Physical Chemistry first.
- Mock test focus — if you lose marks in a high-weightage chapter in mocks, fix that gap immediately before the next mock.
Weightage analysis based on NEET papers from 2019–2025. Individual papers may vary ±10% from these averages. Use as a prioritisation guide, not an exact prediction. Last updated: February 2026.
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Try Super Tutor — It's FreeFrequently Asked Questions
Which chapters have the highest weightage in NEET?
Top 5 by marks: (1) Human Physiology — 40–48 marks, (2) Genetics & Evolution — 40–48 marks, (3) Plant Physiology — 24–32 marks, (4) Ecology — 24–32 marks, (5) Physical Chemistry (combined) — 60–68 marks. Biology chapters dominate because Biology carries 360 out of 720 marks.
How many chapters are there in NEET syllabus?
NEET has approximately 97 chapters total: Biology — 38 chapters (Class 11: 22, Class 12: 16), Chemistry — 30 chapters (Physical: 10, Organic: 10, Inorganic: 10), Physics — 29 chapters. You need to cover all for a 650+ score, but the top 40 chapters cover ~70% of marks.
Is Class 11 or Class 12 more important for NEET?
Both are equally important in terms of marks distribution. However, Class 11 Biology (especially Diversity of Living Organisms, Plant Physiology, Cell Biology) is often found harder by students. Class 12 chapters (Genetics, Human Physiology, Reproduction) tend to be more frequently tested. A balanced approach is essential.
Which Biology chapters should I prioritise for NEET?
Top priority: Human Physiology (8–10 questions), Genetics & Evolution (8–10 questions), Ecology (5–6 questions), Reproduction (5–6 questions), Cell Biology (4–5 questions). These 5 units alone carry 150–180 out of 360 Biology marks. Master these first, then expand to other chapters.
Can I score 600+ by studying only high-weightage chapters?
No. High-weightage chapters cover ~65% of marks (about 470 out of 720). For 600+, you need to cover at least 85–90% of the syllabus. However, studying high-weightage chapters first is the smartest strategy — it ensures you maximise marks early in your preparation.
Does NEET repeat questions from previous years?
NEET does not repeat exact questions, but concepts and question patterns repeat frequently. About 30–40% of questions in any given NEET paper are based on concepts that appeared in previous years. This is why solving 10 years of previous papers is one of the most effective preparation strategies.