CBSE Syllabus 2026-27: Class 10 & 12 Removed and Internal-Only Topics
CBSE deleted syllabus 2026-27 for Class 10 and 12: topics removed, topics assessed only by your school, and what is still in the 2027 board exam.
The CBSE Curriculum 2026-27 is out on cbseacademic.nic.in and applies to the 2027 board exams. CBSE does not publish a separate "deleted syllabus" any more: each subject PDF lists what is prescribed, and flags some topics as assessed only by your school ("assessed only formatively", "Periodic Assessment only", "project work" or "only map pointing"). Below are the key removed and school-only topics for Class 10 and Class 12, checked against the 2026-27 subject syllabi.
Where to Check the Official Syllabus
| Source | URL | What to Look For |
|---|---|---|
| CBSE Academic | cbseacademic.nic.in | Curriculum 2026-27 → Secondary (Classes 9–10) or Senior Secondary (Classes 11–12) → your subject PDF |
| CBSE Academic | cbseacademic.nic.in | Sample Question Papers 2026-27, which follow the same syllabus |
What CBSE's Labels Mean
| Label in the syllabus | What It Means | Action |
|---|---|---|
| Not in the syllabus | Removed. Not assessed anywhere. | Skip for boards. It may still be in the JEE/NEET syllabus. |
| Assessed only formatively / Periodic Assessment only | Taught and assessed by your school, not in the board exam | Study it for school tests and your portfolio. |
| Project work / internally assessed | Assessed through a project or activity in school | Do the project well; it counts in internal assessment. |
| Only map pointing | Only the map items are asked in the board exam | Learn the map items; skip the theory for the board paper. |
| Listed in the syllabus | Assessed in the board exam | Prepare thoroughly. |
Class 10 — Key Removed and School-Only Topics
Mathematics
| Chapter | Status in 2026-27 |
|---|---|
| Real Numbers | Euclid's division lemma removed; Fundamental Theorem of Arithmetic (statement) and irrationality proofs of √2, √3, √5 remain |
| Polynomials | Division algorithm removed; relationship between zeros and coefficients only for quadratic polynomials |
| Pair of Linear Equations | Graphical method plus substitution and elimination only; cross-multiplication is not listed |
| Triangles | BPT proof is still required; the other similarity results are stated without proof |
| Constructions | Entire chapter removed |
Science
| Topic | Status in 2026-27 |
|---|---|
| Periodic Classification of Elements | In syllabus but assessed only formatively (not in Board exam) |
| Heredity and Evolution | Heredity is assessed; Evolution is formative only |
| Magnetic Effects of Current | Motor, electromagnetic induction and generator are formative only |
| Sources of Energy; Sustainable Management of Natural Resources | Not in the syllabus |
| Our Environment | Retained, including ozone depletion |
| Chemical Reactions; Metals and Non-metals; Carbon Compounds | Retained, including corrosion and its prevention, and soaps and detergents |
| Light | Mirror and lens formula derivations not required; colour of the sun at sunrise and sunset excluded |
Social Science
| Subject | Status in 2026-27 |
|---|---|
| History | The Age of Industrialisation: Periodic Assessment only. The Making of a Global World: subtopics 1–1.3 in the board exam, the rest as an internally assessed project. Print Culture and the Modern World: fully assessed. |
| Geography | Minerals and Energy Resources and Manufacturing Industries: fully assessed. Lifelines of National Economy: only map pointing in the board exam. |
| Political Science | Political Parties: fully assessed. Democracy and Diversity, Popular Struggles and Movements, and Challenges to Democracy: not in the syllabus. |
| Economics | Globalisation: only "What is Globalisation?" and the factors that enabled it in the board exam; the rest as an internal project. Consumer Rights: project work. |
Focus on what matters
Super Tutor has chapter summaries, revision notes and practice quizzes for every CBSE Class 10 and 12 chapter.
Start freeClass 12 — Key Removed and School-Only Topics
Physics
| Chapter | Status in 2026-27 |
|---|---|
| Electric Charges & Fields | Continuous charge distribution is retained |
| Electrostatic Potential and Capacitance | Energy stored in a capacitor: formulae only, no derivation |
| Electromagnetic Waves | Basic idea of displacement current is retained |
| Communication Systems | Not in the syllabus |
| Semiconductor Electronics | Energy bands (qualitative), p-n junction, diode characteristics and the diode as a rectifier. LED, solar cell, Zener diode and transistors are not in the theory syllabus. |
Chemistry
| Chapter | Status in 2026-27 |
|---|---|
| Solid State; p-Block Elements | Not in the Class 12 syllabus |
| Solutions | Abnormal molecular masses are retained |
| Surface Chemistry | Assessed only formatively (not in the board exam) |
| General Principles and Processes of Isolation of Elements | Assessed only formatively |
| Polymers; Chemistry in Everyday Life | Assessed only formatively |
Mathematics
| Chapter | Status in 2026-27 |
|---|---|
| Relations & Functions | Types of relations and one-one/onto functions; binary operations are not in the syllabus |
| Inverse Trigonometric Functions | Definition, range, domain, principal value branch and graphs |
| Determinants | Up to 3 × 3; minors, cofactors, area of a triangle, adjoint and inverse, solving linear equations using the inverse |
| Linear Programming | Still in the syllabus (Unit V, 5 marks) |
Biology
| Chapter | Status in 2026-27 |
|---|---|
| Reproduction in Organisms | Not in the syllabus |
| Strategies for Enhancement in Food Production | Not in the syllabus |
| Environmental Issues | Assessed only formatively (not in the board exam) |
Important Warning for JEE/NEET Students
The CBSE syllabus is not the JEE or NEET syllabus. These are different exams with different syllabuses.
- Topics removed from CBSE Physics and Chemistry (for example, Communication Systems, Solid State) — check whether they are in that year's JEE Main or NEET syllabus before skipping them
- School-only CBSE topics such as Surface Chemistry or Chemistry in Everyday Life can still appear in entrance exams if NTA lists them
- Always cross-check with the official JEE Main / NEET information bulletin on NTA's website
- When in doubt, prepare the topic — it is better to over-prepare than miss questions
Based on the CBSE Curriculum 2026-27 subject syllabi on cbseacademic.nic.in (Class X Mathematics, Science and Social Science; Class XII Physics, Chemistry, Mathematics and Biology). This page lists key changes, not every line; download the complete subject document for your stream.
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Start freeFrequently Asked Questions
Where can I find the official CBSE deleted syllabus?
The official source is the CBSE Curriculum 2026-27 on cbseacademic.nic.in (curriculum_2027.html). CBSE does not publish a separate deleted list: the syllabus lists what is prescribed and marks topics assessed only by the school.
Will deleted topics appear in the board exam?
Topics that are not in the 2026-27 syllabus, and topics marked 'assessed only formatively', 'Periodic Assessment only', 'project work' or 'only map pointing', are not asked in the board exam in the usual way. Check your subject PDF for the exact wording. Competitive exams (JEE Main, NEET, CUET) have their own syllabus, which may still include some of these topics.
Are deleted topics important for JEE/NEET?
Possibly. JEE Main and NEET follow their own syllabus, published by NTA, which can include topics that CBSE has removed or moved to school assessment. Always cross-check with the JEE Main or NEET information bulletin. If a topic is in the NTA syllabus, prepare it regardless of its CBSE status.
Does CBSE delete syllabus every year?
CBSE cut the syllabus sharply during COVID (a 30% reduction for 2020-21), and later rationalisation made some of those removals permanent. The curriculum is revised every year: the 2026-27 subject syllabi were published on cbseacademic.nic.in in 2026. Class 9 moved to a new syllabus in 2026-27, so older Class 9 'deleted' lists no longer apply.
Should I study deleted topics for internal assessment?
It depends on the label. Topics that are not in the syllabus at all are not assessed anywhere. But topics marked 'assessed only formatively' or 'Periodic Assessment only' are still assessed by your school through class tests, activities and your portfolio, so study them for school even though they are not in the board exam.
Is the deleted syllabus the same for all streams?
No. Each subject has its own syllabus document and its own changes. Download the subject-specific PDF from cbseacademic.nic.in to see exactly which topics are removed or school-assessed for your subjects.