Read this before you trust a single number
You asked for year-by-year chapter weightage for the last three to four years. The sources supplied don't contain that. Here is exactly what they do contain, so you know which conclusions are solid and which are inference.
No source gives chapter weightage split by individual year
The only chapter-level tables available are (a) a five-year aggregate for 2021–2025 covering all three subjects, and (b) a 2026 combined Jan + April snapshot for Physics only. A 2021-vs-2022-vs-2023 chapter comparison cannot be built from this material, and nothing on this page pretends to. Where a trend is shown, it is a comparison of those two windows — two points, not a time series.
| What you asked for | Physics | Chemistry | Mathematics | Source |
|---|---|---|---|---|
| Chapter counts, 2021–2025 aggregate | Yes | Yes | Yes | myexams.ai |
| Chapter weightage %, 2026 (Jan + April combined) | Yes | No | No | Competishun |
| Chapter weightage for 2021, 2022, 2023, 2024, 2025 separately | No | No | No | — |
| Subject difficulty rating per year, 2021–2025 | Yes | Yes | Yes | myexams.ai |
| Shift-by-shift difficulty and cutoffs, 2025 | Yes — paper level, not chapter level | Adarsh Barnwal | ||
Per subject, 20 questions are multiple choice and 5 are numerical value type. The 8,358 figure is the sum of the source's own chapter counts across all shifts of all sessions in the window — it is not the size of one paper.
Chapter explorer
Sort any column. Search any chapter. Switch the dataset between the five-year aggregate and the 2026 Physics snapshot. Share % is each chapter's questions as a portion of that subject's total in the window.
The same numbers, drawn
All four charts follow the subject tab above. Change the tab and they redraw.
Top 12 chapters by share of questions
Effort against return
Class 11 against Class 12
Subject difficulty by year
What moved in Physics between 2021–2025 and 2026
This is the only rising-and-falling comparison the sources support, and only for Physics. It sets each chapter's share of the 2021–2025 pool against its 2026 weightage. Read it as direction, not as a precise delta — see the caution below.
Two sources, two chapter vocabularies
The 2026 source groups chapters differently from the 2021–2025 source: it merges kinetic theory with thermodynamics, splits modern physics into atomic and nuclear, and uses names like "EMF" and "Measurement Error" that have no exact counterpart. Every row below is a manual mapping. Rows marked approximate depend on a grouping judgement and should carry less confidence. Percentage-point gaps between two differently-built datasets are indicative only.
Gaining weight in 2026
Losing weight in 2026
Two chapters carried a 0.00% weightage in the 2026 pool: Mathematical Tools and Principle of Communication. The second has no counterpart at all in the 2021–2025 chapter list.
What to open first
A chapter earns priority two ways: it appears often, and it costs little to prepare. This ranking blends both — 65% weight on share of questions, 35% on questions returned per prep hour, each scaled against the highest scorer in that subject. The formula is mine, not the sources'; the inputs are theirs.
Frequently asked, every window
Physics. Current Electricity and Rotational Motion are called heavyweights outright. Kinetic Theory of Gases and Moving Charges & Magnetism are named alongside them as high-weightage, high-return areas, each contributing more than 20 questions over five years.
Chemistry. Coordination Compounds and the d- and f-Block are described as non-negotiable. Chemical Bonding, Thermodynamics and Redox Reactions are named for consistently high frequency and strong return.
Mathematics. 3D Geometry and Binomial Theorem are the named must-dos. Relation and Area Under Curve join them on return per hour; Definite Integration, Differential Equations, Determinants and Statistics sit in the top-ten return list.
The trap in a pure priority list
Low-weightage chapters are not free to skip. They are described as sometimes-scoring areas with less competition, and several — Relative Motion, Thermal Expansion — are foundations for the bigger chapters above them, so dropping them quietly damages the chapters you were trying to protect.
The 2026 source also asks you to cross-check both windows rather than trusting one: a chapter that is high in the five-year pool and high in 2026 is a much safer bet than one that spikes in a single window.
Paper-level difficulty, 2025
Shift-by-shift ratings with the marks needed for the 99th percentile. Useful for calibrating what a score means, not for choosing chapters — this data has no chapter dimension.
JEE Main cutoff for JEE Advanced
Candidates qualifying for Advanced, 2025
A revision plan the data supports
Drawn from what both sources recommend, plus what their own numbers imply. Nothing here needs a chapter list you don't have.
- Split your hours 60 / 30 / 10. Sixty per cent on the high-return chapters, thirty on the middling ones, and the last ten on low-yield topics only if time survives. This is the source's own rule and it maps cleanly onto the three bands in the table above.
- Set the weekly subject budget before the week starts. The recommended split is Physics 14–16 hours of study and 4–5 of revision, Chemistry 12–14 and 4, Mathematics 16–18 and 5. Mathematics gets the most study time because it is the most calculation-heavy, not because it carries more marks — all three subjects are worth 100.
- Protect Class 11 in Chemistry. Class 12 dominates Physics and Mathematics, but Class 11 holds the upper hand in Chemistry, so a plan built only around current Class 12 coursework quietly loses marks. Thermodynamics and Equilibrium are the named chapters to keep warm.
- Treat Chemistry as the anchor. It carries the lowest average difficulty across 2021–2025 at 2.16, and a large share of it is fact-based. Read NCERT line by line for Biomolecules and p-Block; go beyond the textbook only for numerical Physical Chemistry.
- In Mathematics, choose rather than solve everything. It has the highest average difficulty at 2.42. The advice is to open with standard-procedure chapters — Statistics, Matrices, 3D Geometry — and leave twisted calculus for the end. Fifteen accurate answers beat three hard ones and twenty lost minutes.
- Rebuild the list every few weeks. Weightage moves. In Physics, optics rose sharply into 2026 while current electricity fell back from its five-year peak — a plan frozen in September is a plan aimed at last year's paper.
- Revise with error logs, not re-reading. Track mistakes made in high-weightage topics specifically, and use formula sheets and concept maps rather than fresh passes through theory. Mixed-topic mocks under exam conditions are what convert coverage into a score.
Limitations, stated plainly
Everything below is a real constraint on this page. None of it was filled in with outside knowledge or estimates.
No per-year chapter data. The 2021–2025 figures are a single five-year total per chapter. They cannot be decomposed into 2022 or 2023. Any page claiming to show you 2023-only chapter weightage from this material would be inventing it.
2026 covers Physics only. The source's Chemistry and Mathematics tabs were not included in the supplied text, so the 2026 comparison, the movers list and the shift chart are Physics-only. Chemistry and Mathematics have no second data point at all.
The two windows count differently. 2021–2025 is expressed in raw question counts across all shifts; 2026 is expressed as a percentage of a 475-question pool. Shares are comparable in direction; the exact gaps are not.
Chapter names don't line up. Mapping between the two windows required judgement in about a third of cases. The largest uncertainties are "EMF" and "Modern Physics-I", each of which I mapped to two chapters from the older list. These are flagged in the movers table.
Question counts exceed one paper. The five-year totals sum to thousands of questions, far more than 75 per paper, so they aggregate every shift of every session. Treat them as frequency evidence, not as a forecast of how many questions your paper will contain.
Internal inconsistency in the source. The five-year source states Physics averages 30 questions a year while its own table implies several hundred. The chapter ratios remain usable; the absolute averages do not.
Bands and the priority score are derived. High, Medium and Low are my thresholds. A chapter is compared with an even split of its own subject: High is at least one and a half times the average chapter, Low is below three quarters of it. Subjects have different chapter counts, so a fixed percentage would have made Chemistry look uniformly heavy. The priority ranking is my 65/35 blend. Both are transparent recalculations of source numbers, not source claims. The 2026 table shows the source's own priority labels instead.
Return per hour is reconstructed. The source defines return as questions per hour of preparation but publishes no column for it. I divided its average-questions-per-year by its recommended prep hours; the result reproduces its stated examples, such as Mathematics chapters exceeding three questions per hour.
Chapter-wise weightage for 2025 by shift does not exist here. The 2025 shift analysis is difficulty and cutoff only. The source links a chapter-weightage PDF but its contents were not supplied.
Cutoff and difficulty figures are one publisher's estimates. The April 2025 shift ratings are described as tentative and based on roughly 2,50,000 student responses; the 99th-percentile marks are that publisher's projections, not official releases.
Sources used
- myexams.ai — chapter-wise weightage, 2021–2025, all three subjects; per-year subject difficulty; recommended prep and revision hours; weekly study plan; the 60/30/10 rule.
- Competishun — chapter-wise weightage for 2026 Jan + April combined, Physics only, with source priority labels and a 475-question pool; paper structure and marking scheme.
- Adarsh Barnwal — shift-by-shift difficulty ratings and 99th-percentile marks for January and April 2025; JEE Advanced qualifying cutoffs 2022–2025 and category-wise qualifier counts.