NEET 2027 chapter-wise weightage: the chapters that carry the paper, measured from 2013 to 2026

Two things stand out. Units & Measurements has gone from under two questions a paper to nearly three; dimensional analysis and error questions are cheap marks that students under-revise because the chapter feels like Class 11 housekeeping. And the "small" Class 12 chapters, Alternating Current, Electromagnetic Waves and Atoms, have each roughly doubled against their 13-year average. The examiner is spreading Physics wider, and a plan built on 2015's weightage misses it.

Inside Current Electricity, one topic carries a third of the chapter: combination of resistors and cells, at over one question a paper and a 75% repeat rate. The chapter page breaks every chapter into its topics with the same numbers.

Chemistry: questions per paper, recent eight papers

1. Coordination Compounds — 3.3 a paper (13-year 2.2, rising)
2. Chemical Bonding & Molecular Structure — 2.9 a paper (13-year 2.9, stable)
3. Equilibrium (Chemical & Ionic) — 2.6 a paper (13-year 2.8, stable)
4. Hydrocarbons — 2.5 a paper (13-year 3.1, stable)
5. Aldehydes, Ketones & Carboxylic Acids — 2.5 a paper (13-year 2.2, stable)
6. Organic Chemistry: Basic Principles — 2.5 a paper (13-year 1.8, rising)
7. d- & f-Block Elements — 2.5 a paper (13-year 1.8, rising)
8. Chemical Kinetics — 2.5 a paper (13-year 1.6, rising)
9. Amines — 2.1 a paper (13-year 1.6, rising)
10. Chemical Thermodynamics — 2.1 a paper (13-year 1.6, rising)
11. Structure of Atom — 2.0 a paper (13-year 1.8, stable)
12. Solutions — 2.0 a paper (13-year 1.5, rising)

Coordination Compounds is now the heaviest chapter in Chemistry, up by half against its long-run average, and it is a chapter where every question is answerable from a finite set of rules: nomenclature, isomerism, crystal-field splitting, magnetic moment. Six of the top twelve are rising; Hydrocarbons is the one heavyweight that has eased, from three a paper to two and a half, which is still enough to make it the fourth chapter you revise, not the twentieth.

Botany: questions per paper, recent eight papers

1. Biotechnology: Principles & Processes — 4.9 a paper (13-year 3.8, rising)
2. Cell: The Unit of Life — 4.0 a paper (13-year 3.8, stable)
3. Organisms & Populations — 4.0 a paper (13-year 2.4, rising)
4. Sexual Reproduction in Flowering Plants — 3.4 a paper (13-year 3.7, stable)
5. Morphology of Flowering Plants — 3.3 a paper (13-year 3.5, stable)
6. Photosynthesis in Higher Plants — 3.3 a paper (13-year 1.8, rising)
7. Cell Cycle & Cell Division — 3.1 a paper (13-year 3.1, stable)
8. Biotechnology & Its Applications — 3.1 a paper (13-year 2.4, rising)
9. Biodiversity & Conservation — 2.9 a paper (13-year 2.4, stable)
10. Plant Growth & Development — 2.6 a paper (13-year 1.9, rising)

Biotechnology, both chapters together, is eight questions a paper. Nothing else in Botany comes close, and it is a chapter students leave to the last month because it sits at the end of Class 12. Organisms & Populations has gone from a chapter that asked two questions to one that asks four, and Photosynthesis has nearly doubled. If your Botany revision still runs in NCERT order, it reaches the two heaviest chapters last.

Zoology: questions per paper, recent eight papers

1. Molecular Basis of Inheritance — 5.8 a paper (13-year 5.2, stable)
2. Principles of Inheritance & Variation — 5.5 a paper (13-year 4.4, rising)
3. Biomolecules — 5.0 a paper (13-year 2.8, rising)
4. Human Reproduction — 3.9 a paper (13-year 3.1, stable)
5. Animal Kingdom — 3.6 a paper (13-year 3.0, stable)
6. Structural Organisation in Animals — 3.5 a paper (13-year 2.6, rising)
7. Human Health & Disease — 3.1 a paper (13-year 2.3, rising)
8. Evolution — 2.9 a paper (13-year 2.9, stable)
9. Reproductive Health — 2.3 a paper (13-year 2.4, stable)
10. Chemical Coordination & Integration — 2.3 a paper (13-year 2.2, stable)

Genetics, the two inheritance chapters, is eleven questions a paper, a quarter of Zoology on its own. Biomolecules is the single biggest mover in the entire exam: from under three a paper over 13 years to five in the recent window. It is a short chapter of enzymes, proteins and nucleic acids that a student can finish in two evenings, and the paper has quietly made it worth twenty marks.

How to turn the table into a plan

Revise in weightage order, not NCERT order. Your first pass of each subject starts at the top of its table. The examiner does not ask questions in chapter sequence and does not ask them in equal measure, so a plan that treats Chapter 1 and Chapter 14 as equal is spending hours where the marks are not.

Weight the rising chapters as their recent number, not their 13-year one. Units & Measurements, Coordination Compounds, Biomolecules, Organisms & Populations, Photosynthesis: every one of these is under-represented in older weightage lists and in every book that copied them.

Do not read "stable" as "safe to skip". Ray Optics has eased slightly and still asks more than two a paper. Hydrocarbons has eased and is still fourth in Chemistry.

Practise by chapter, then by topic. The table above is the chapter level; underneath, each chapter's questions cluster into two or three topics that repeat. The chapter-wise test builds a paper from one chapter at the real weighting, and the topic-wise test goes one level down. The adaptive practice uses exactly these numbers to decide what to serve next.

Read next

• NEET 2027 preparation strategy, month by month, the 234 days from now to 2 May 2027 laid out against this table.
• What NTA deleted from the NEET syllabus, the chapters and topics excluded from every number above, checked question by question.
• Most repeated NEET topics, the same data at topic level, with repeat rates.

FAQ

Which chapters have the highest weightage in NEET 2027?

Measured over the eight most recent papers (2023 to 2026): Current Electricity in Physics (3.3 questions a paper), Coordination Compounds in Chemistry (3.3), Biotechnology: Principles and Processes in Botany (4.9), and Molecular Basis of Inheritance in Zoology (5.8). The two genetics chapters together are eleven questions a paper.

How many chapters are in the NEET 2027 syllabus?

On the 2024 rationalised syllabus that applies to 2027: 28 chapters in Physics, 21 in Chemistry, 16 in Botany and 16 in Zoology, 81 in all, for 180 questions. Deleted chapters and topics are excluded from every table on this page.

Which NEET chapters are rising in weightage?

The biggest movers against their 13-year average are Biomolecules (2.8 to 5.0 questions a paper), Organisms and Populations (2.4 to 4.0), Photosynthesis (1.8 to 3.3), Coordination Compounds (2.2 to 3.3), Units and Measurements (1.7 to 2.8), and Atoms (1.0 to 1.9).

Is NEET 2027 chapter weightage the same as previous years?

The syllabus is the same, so the chapters are; the weights are not. The recent-window numbers here differ from the 13-year averages for about a third of chapters, and any weightage list built before the 2025 and 2026 papers understates the rising ones.

Which subject has the most concentrated weightage?

Zoology: its top ten chapters carry 80% of its questions in the recent window. Botany is 75%, Chemistry 60%, Physics 49%. Physics is the subject where skipping the tail costs the most.

Where do these weightage numbers come from?

From 4,858 questions across every NEET paper from 2013 to 2026, including re-examinations, each tagged to its chapter and topic. The recent window is the eight most recent papers; the 13-year figure is the full set. The same data drives the practice engine on this site.

Sources: nextAIR's tagged question set of every NEET (UG) paper 2013 to 2026, 4,858 questions, built against the NCERT chapter list and the NMC's 2024 rationalised syllabus; NTA NEET (UG) information bulletins 2019 to 2026 for the paper shape. Numbers are questions per paper, rounded to one decimal. nextAIR is independent of NTA.