JEE Main 2027 Session 1 registration is open till 22 November 2026, and the exam runs from 20 to 28 January 2027. That leaves you roughly 80 days. Eighty days is enough time to revise smartly — but not enough time to revise everything ten times. So the real question every student is asking is the right one: which chapters give the most questions in the paper? This guide answers it honestly, chapter by chapter, for Physics, Chemistry and Maths.
⚠️ First, the honest truth about "weightage": NTA publishes the syllabus — 54 units (20 Physics, 20 Chemistry, 14 Maths) — but it has never published any official chapter-wise marks weightage. Every weightage table on the internet, including this one, is an analysis of recent question papers. The numbers below are built from a full count of the JEE Main 2026 papers (all shifts, both sessions), checked against the 2024–2026 trend. They are averages per paper, not promises: your shift's paper will differ a little. Use them to decide the order of your revision — never as a list of chapters to skip. Low-weightage chapters still give easy questions, and toppers do not skip them.
JEE Main 2027 Paper 1 — The Pattern in 30 Seconds
| Subject | Section A — MCQs | Section B — Numerical Value | Total |
|---|---|---|---|
| Physics | 20 questions | 5 questions | 25 questions · 100 marks |
| Chemistry | 20 questions | 5 questions | 25 questions · 100 marks |
| Mathematics | 20 questions | 5 questions | 25 questions · 100 marks |
In total: 75 questions, 300 marks, 3 hours, computer-based. Every correct answer gives +4, and a wrong answer costs −1 in both sections — yes, the numerical section also has negative marking now. All 75 questions are compulsory; the old "attempt any 5 out of 10" choice in Section B was removed in 2025. (Source: JEE Main 2027 Information Bulletin pattern, as reported from the bulletin.)
How to read the tables below: "Questions per paper" is the average across all the shifts of JEE Main 2026. 2 or more = high weightage, about 1–2 = medium, 0–1 = low. Marks are simply questions × 4. Chapters are listed inside each subject from heaviest to lightest.
Physics — Chapter-Wise Weightage
| Chapter (NTA unit) | Questions per paper (avg.) | Approx. marks |
|---|---|---|
| Optics | 2–3 | 8–12 |
| Electrostatics | About 2 | About 8 |
| Properties of Solids and Liquids | About 2 | About 8 |
| Magnetic Effects of Current and Magnetism | 1–2 | 4–8 |
| Rotational Motion | 1–2 | 4–8 |
| Electromagnetic Induction and Alternating Currents | 1–2 | 4–8 |
| Current Electricity | 1–2 | 4–8 |
| Atoms and Nuclei | 1–2 | 4–8 |
| Oscillations and Waves | 1–2 | 4–8 |
| Units and Measurement | 1–2 | 4–8 |
| Kinematics | About 1 | About 4 |
| Electronic Devices | About 1 | About 4 |
| Laws of Motion | About 1 | About 4 |
| Thermodynamics | About 1 | About 4 |
| Kinetic Theory of Gases | About 1 | About 4 |
| Electromagnetic Waves | About 1 | About 4 |
| Dual Nature of Matter and Radiation | About 1 | About 4 |
| Work, Energy and Power | About 1 | About 4 |
| Gravitation | 0–1 | 0–4 |
| Experimental Skills | 0–1 | 0–4 |
Optics is the single biggest Physics chapter — it has topped the subject three years in a row. Electrostatics and Properties of Solids and Liquids sit right behind it. Together, the top nine chapters above cover well over half of a typical Physics paper, which is why they anchor the first phase of the plan below.
Chemistry — Chapter-Wise Weightage
| Chapter (NTA unit) | Questions per paper (avg.) | Approx. marks |
|---|---|---|
| Co-ordination Compounds | About 2 | About 8 |
| Organic Compounds Containing Oxygen | About 2 | About 8 |
| Hydrocarbons | 1–2 | 4–8 |
| Organic Compounds Containing Nitrogen | 1–2 | 4–8 |
| Redox Reactions and Electrochemistry | 1–2 | 4–8 |
| Equilibrium | 1–2 | 4–8 |
| Atomic Structure | 1–2 | 4–8 |
| Some Basic Principles of Organic Chemistry (GOC) | 1–2 | 4–8 |
| Chemical Kinetics | 1–2 | 4–8 |
| Chemical Thermodynamics | 1–2 | 4–8 |
| Chemical Bonding and Molecular Structure | 1–2 | 4–8 |
| Solutions | 1–2 | 4–8 |
| Some Basic Concepts in Chemistry (Mole Concept) | About 1 | About 4 |
| d- and f-Block Elements | About 1 | About 4 |
| Biomolecules | About 1 | About 4 |
| Purification and Characterisation of Organic Compounds | About 1 | About 4 |
| Classification of Elements and Periodicity in Properties | About 1 | About 4 |
| p-Block Elements | About 1 | About 4 |
| Organic Compounds Containing Halogens | 0–1 | 0–4 |
| Principles Related to Practical Chemistry | 0–1 | 0–4 |
Co-ordination Compounds is the most dependable chapter in the whole exam — almost exactly two questions per paper in 2024, 2025 and 2026. Chemistry is also the most spread-out subject: no single chapter dominates, and the Organic block as a whole (GOC + Hydrocarbons + Oxygen + Nitrogen units) is the biggest single area. Most Inorganic questions come almost directly from NCERT lines, so read the NCERT chapters even for "medium" rows.
Mathematics — Chapter-Wise Weightage
| Chapter (NTA unit) | Questions per paper (avg.) | Approx. marks |
|---|---|---|
| Co-ordinate Geometry | 3–4 | 12–16 |
| Integral Calculus | 2–3 | 8–12 |
| Complex Numbers and Quadratic Equations | About 2 | About 8 |
| Limit, Continuity and Differentiability | About 2 | About 8 |
| Sequence and Series | About 2 | About 8 |
| Sets, Relations and Functions | About 2 | About 8 |
| Matrices and Determinants | About 2 | About 8 |
| Statistics and Probability | About 2 | About 8 |
| Three-Dimensional Geometry | 1–2 | 4–8 |
| Trigonometry | 1–2 | 4–8 |
| Vector Algebra | 1–2 | 4–8 |
| Permutations and Combinations | About 1 | About 4 |
| Differential Equations | About 1 | About 4 |
| Binomial Theorem and Its Simple Applications | About 1 | About 4 |
Co-ordinate Geometry is the biggest unit in the entire JEE Main syllabus — roughly 3–4 questions in every paper, and the number-one Maths chapter in 2024, 2025 and 2026 (its share has eased a little each year, but the lead is still large). The two Calculus units together are the next block. Maths has only 14 units, so each unit is wide: do not mistake a "medium" row for a small chapter.
Weightage Moves — Why Last Year's Table Is Not a Promise
Compare the three-year trend and you will see why these tables must be used with care. Some Basic Principles of Organic Chemistry (GOC) was one of the heaviest Chemistry chapters in 2024, but its count has fallen sharply since. Limit, Continuity and Differentiability in Maths has also come down from its 2024 level. Meanwhile Co-ordination Compounds has stayed almost perfectly flat at about two questions per paper, and Chemical Kinetics has crept up a little every year. Chapters rise and fall; the broad order stays similar, the exact numbers do not. That is exactly why this post gives you bands, not fake-precise promises.
How to Use This in the Remaining ~80 Days
Phase 1 — November (about 30 days): revise in weightage order. Start with the high band of each subject: Optics, Electrostatics and Rotational Motion in Physics; Co-ordination Compounds, the Oxygen unit and GOC in Chemistry; Co-ordinate Geometry and Integral Calculus in Maths. For every chapter, do theory quickly and then solve its previous-year questions — weightage tells you the order, PYQs do the teaching.
Phase 2 — December (about 30 days): complete the whole syllabus once. Move through the medium band, and give at least one proper pass to every low-band chapter. Start one full mock test a week, in the real 9 am or 3 pm slot, and keep an error notebook. A chapter you have "finished" but never tested is not finished.
Phase 3 — 1 to 19 January (about 19 days): revision and mocks only. No new books and no new chapters. Revise formula sheets and your error notebook, take a mock every two to three days, and sleep properly in the last week. Your admit card is expected around 13 January 2027 and the first exam day is 20 January — keep those days light.
Dropper or Class 12 student? Droppers can follow the phases exactly as written. Class 12 students must protect their board preparation too — the good news is that most of this syllabus is the same NCERT you are studying for boards, so revise board chapters in the same weightage order instead of running two separate plans. If you are a UP Board student, our UP Board Date Sheet 2027 guide will help you place both exams on one calendar.
Chapters Students Wrongly Skip
- Biomolecules (Chemistry) — a short, almost fully NCERT-based chapter that still gives about one question per paper. One careful reading is usually enough.
- Electromagnetic Waves (Physics) — a few pages of theory, mostly the spectrum and its uses, for about one question in most papers.
- Experimental Skills (Physics) and Practical Chemistry — tiny units that appear in some shifts every year; a single evening covers both.
- Units and Measurement (Physics) — students call it "too easy to matter", yet it averages more than one question per paper, mostly on dimensions and errors.
- Statistics (Maths) — formula-based and quick to revise; it sits inside a unit averaging about two questions per paper.
- Electronic Devices (Physics) — logic gates and diode basics repeat year after year at about one question per paper.
The pattern is always the same: small chapter, direct question, easy four marks — lost only because the chapter was never opened. Skipping is a decision you make with your eyes open after seeing the band, not before.
✅ Not applied yet? Session 1 registration closes on 22 November 2026 (11:50 pm). Our step-by-step JEE Main 2027 registration guide covers eligibility, photo and document sizes, the full fee table and the correction window — finish the form first, then come back to this plan.
Frequently Asked Questions
Q. Is this weightage officially announced by NTA?
No. NTA has never released chapter-wise weightage. The only official document is the syllabus (54 units) in the Information Bulletin on jeemain.nta.ac.in. Every weightage table — this one included — is an analysis of previous papers, and you should treat it as a planning guide, not an announcement.
Q. Can I skip the low-weightage chapters completely?
We do not advise it. Low means "0–1 questions per paper", not "zero". Across three subjects, the low chapters together are worth a meaningful number of marks, and their questions are usually the most direct ones in the paper. Give them a light but real pass in Phase 2.
Q. Is the weightage the same every year?
No. It shifts between years and even between shifts of the same session. Some chapters, like Co-ordination Compounds and Co-ordinate Geometry, have held their position for three years; others, like GOC, have fallen. That is why revision order should follow the broad bands, not one year's exact count.
Q. Where can I see the official JEE Main syllabus?
In the JEE Main 2027 Information Bulletin and the syllabus PDF on the official portal, jeemain.nta.ac.in. Physics has 20 units, Chemistry 20 and Maths 14, taken from the Class 11 and 12 NCERT syllabus. The 2027 syllabus is unchanged from 2026 — topics removed in the 2024 reduction (such as Mathematical Reasoning and Polymers) are still out.
Q. Does the same weightage apply to Session 2 (April 2027)?
Broadly, yes — Session 2 papers are set from the same syllabus and show a similar chapter mix, which is why the January attempt plus this analysis is a good base for April too. But no one can promise the same counts; treat the April paper as a fresh draw from the same syllabus.
Q. Class 11 or Class 12 — which carries more weight?
It changes a little every year and differs by subject. In recent papers the split has been close to half and half overall, with Class 12 slightly ahead in Physics and Chemistry. The practical answer: do not neglect either class — the high-band chapters above come from both.
KAMALDNP Academy is a private coaching institute. We are not part of the National Testing Agency (NTA). The weightage figures in this post are our study of published analyses of recent JEE Main papers (2024–2026) and are shared for planning only; they are not official data and not a guarantee of any question or score. Always confirm the syllabus, pattern and dates on the official portal, jeemain.nta.ac.in.
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