The CBSE class 10 deleted syllabus 2025-26 shows details regarding topics and chapters that have been removed for subjects such as Maths, Science, Social Science, English, and others. The updated CBSE class 10 syllabus 2025-26 can be downloaded at cbse.gov.in.
The Central Board of Secondary Education (CBSE) has released the updated syllabus for the upcoming class 10 board exam and has restructured the curriculum by 30 percent over the years. Moreover, due to the deleted syllabus of class 10 2025-26, the chapter-wise weightage and CBSE 10th exam pattern 2025-26 have changed.
As per the CBSE Class 10 deleted syllabus 2025-26 PDF, certain construction methods and a few trigonometry topics have been deleted for the Mathematics subject. Periodic Classification of Elements, with some other topics from a few chapters, has been removed for the Science subject, while various other topics and chapters from History, Geography, & Political Science have been discontinued for the academic year 2025-26.
In this article, students will get the detailed subject-wise syllabus for the CBSE class 10 Board exam 2026. Students must thoroughly go through this updated syllabus and keep in mind the deleted parts of the syllabus to avoid confusion.
Subject-Wise Deleted Syllabus of Class 10 CBSE 2025-26
Refer to the details mentioned below to understand the deleted portion of class 10 CBSE 2025-26 for each subject. Understanding the deleted portion in the CBSE class 10 syllabus 2025-26 and focusing more on the important topics will help students score higher grades.
Deleted Syllabus of CBSE Class 10 for Mathematics
The deleted syllabus of class 10 Maths CBSE contains chapters removed from Real Numbers, Polynomials, Quadratic Equations, Triangles, Introduction to Trigonometry, Construction, and more. To better understand the CBSE Class 10 Maths deleted syllabus 2025-26, refer to the table below.
| Chapter | Topics removed |
| Unit 1 - Number Systems | |
| Real Numbers | Euclid’s division lemma |
| Unit 2 - Algebra | |
| Polynomials | Statement and simple problems on the division algorithm for polynomials with real coefficients |
| Pair of Linear Equations in two variables | Cross multiplication method |
| Quadratic Equations | Situational problems based on equations reducible to a quadratic equation |
| Arithmetic Progressions | Application in solving daily life problems based on a sum to n terms |
| Unit 3 - Coordinate Geometry | |
| Coordinate Geometry | Area of a triangle |
| Unit 4 - Geometry | |
| Triangles | Proof of the following theorems is deleted - The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides, In a triangle, if the square on one side is equal to the sum of the squares on the other two sides, the angle opposite to the first side is a right angle. |
| Circles | No deletion |
| Constructions | Construction of a triangle similar to a given triangle. |
| Unit 5 - Trigonometry | |
| Introduction to Trigonometry | Motivate the ratios, whichever are defined at 0 ° and 90 ° |
| Trigonometric Identities | Trigonometric ratios of complementary angles |
| Heights and Distances | No deletion |
| Unit 6 - Mensuration | |
| Areas related to circles | Problems with the central angle of 120° |
| Surface areas and Volume | Frustum of a cone. |
| Unit 6 - Statistics and Probability | |
| Statistics | Step Deviation Method for finding the mean cumulative Frequency graph |
| Probability | No deletion |
Deleted Syllabus of Class 10 CBSE 2025-26 for Science
The class 10 CBSE deleted syllabus 2025-26 for Science consists of chapters removed from the units such as Chemical Substances, World of Living, Natural Phenomena, Effects of Current, Natural Resources, and more. For detailed information about the CBSE Class 10 Science deleted syllabus 2025-26, refer to the table below for the theory exam.
| Units | Chapters |
| Unit I: Chemical Substances – Nature and Behaviour | Metals and Non-metals: Basic Metallurgical processes; Corrosion and its prevention, Carbon and its Compounds: Nomenclature of carbon compounds containing functional groups (halogens, alcohol, ketones, aldehydes, alkanes, and alkynes), the difference between saturated hydrocarbons and unsaturated hydrocarbons. Chemical properties of carbon compounds (combustion, oxidation, addition, and substitution reactions). Ethanol and Ethanoic acid (only properties and uses), soaps, and detergents. |
| Unit II: World of Living | Control and coordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and coordination in animals: Nervous system; Voluntary, involuntary, and reflex action; Chemical coordination: animal hormones, Heredity and Evolution: The Basic Concepts of Evolution. |
| Unit III: Natural Phenomena | The Human Eye and the Colourful World: Functioning of a lens in the human eye, defects of vision and their corrections, applications of spherical mirrors and lenses. |
| Unit IV: Effects of Current | Magnetic Effects of Electric Current: Electric Generator, Direct Current. Alternating current: frequency of AC. Advantages of AC over DC. Domestic electric circuits. |
| Unit V: Natural Resources | Sources of energy: Different forms of energy, conventional and non-conventional sources of energy: Fossil fuels, solar energy, biogas, wind, water, tidal energy, and Nuclear energy. Renewable versus non-renewable sources of Energy. |
Deleted Syllabus of CBSE Class 10 for Social Science
The class 10 deleted syllabus CBSE 2025-26 for Social Science includes chapters removed from units like India and the Contemporary World-II, Contemporary India-II, and Democratic Politics-II. The detailed CBSE Class 10 Social Science deleted syllabus 2025-26 is mentioned below for History, Political Science, and Geography.
| S. No. | Chapter No. and Chapter Name (NCERT Textbook) | Recommended Portion for deletion |
| Unit 1: India and the Contemporary World –II (History) | ||
| 1. | Section 2: Livelihoods, Economies, and Societies NOTE- ANYONE OUT OF THESE TWO CHAPTERS (CH-3/CH4)Chapter 3: The Making of a Global World Chapter 4: The Age of Industrialisation | The chosen Chapter is to be assessed in the Periodic Tests and not in the Board Examination. |
| 2. | Section 3: Everyday Life, Culture, and Politics Chapter 5: Print Culture and the Modern World | Complete Chapter |
| Unit 2: Contemporary India – II (Geography) | ||
| 3 | Chapter 2: Forest and Wildlife | Complete Chapter |
| 4 | Chapter 3: Water Resources | Complete the Chapter except for Map Items, which will be assessed in the Examination |
| 5 | Chapter 5: Mineral and Energy Resources | Complete the Chapter except for Map Items, which will be assessed in the Examination |
| Unit 3: Democratic Politics –II (Political Science) | ||
| 6 | Chapter 3: Democracy and Diversity | Complete Chapter |
| 7 | Chapter 4: Gender, Religion, and Caste | Complete Chapter |
| 8 | Chapter 5: Popular Struggles and Movements | Complete Chapter |
| 9 | Chapter 8: Challenges to Democracy | Complete Chapter |
Also Read: CBSE Class 10 Home Science Deleted Syllabus 2025-26
Deleted Syllabus of CBSE Class 10 for English
Some of the deleted syllabus of class 10 CBSE 2025-26 show chapters removed, such as Use of Passive Voice, Noun, Adverb Clauses, and more. The detailed CBSE class 10 English deleted syllabus 2025-26 is mentioned below.
- Use of Passive Voice, Clauses: Noun, Adverb Clauses of condition and time, Relative Prepositions
- English First Flight Syllabus
- First Flight Literature - How to Tell Wild Animals, Trees, Fog, Mijbil the Otter, For Anne Gregory
- English Footprints Without Feet Syllabus
- The Midnight Visitor, A Question of Trust, The Book That Saved The Earth
CBSE Class 10 Deleted Syllabus 2025-26 for Hindi
The CBSE 10th Hindi syllabus 2025-26 is divided into two parts. The detailed CBSE class 10 deleted syllabus 2025-26 for Hindi is mentioned below, which students must refer to.
Also Read: CBSE Class 10 Hindi Deleted Syllabus 2025-26
How to Download the Deleted Syllabus of CBSE Class 10?
Students appearing for the upcoming CBSE Class 10 exams must familiarise themselves with the updated syllabus. Follow the step-by-step procedure to download the CBSE class 10 deleted syllabus 2025-26.
- Step 1: Students need to visit the official website of the board - cbse.gov.in.
- Step 2: Students then need to click on 'Academic Website', and a new window will pop up.
- Step 3: Students need to click on 'Curriculum' at the top of the page.
- Step 4: Under the 'Curriculum' section, students need to click on 'Curriculum 2025-26'.
- Step 5: A new page pops up with options; students can select the 'Secondary Curriculum (IX - X)'.
- Step 6: Students need to click on the subject and download the CBSE class 10 deleted syllabus PDF 2025-26.
- Step 7: Students need to save and take a printout of the PDF for future reference.
CBSE Class 10 Revised Syllabus 2025-26 PDF Download
The board has updated the class 10 syllabus for the academic year 2025-26, which excludes the topics as per the CBSE class 10 deleted syllabus 2025-26. Below is the updated syllabus for the subject and the new pattern students must refer to.
| Subjects | |
| CBSE 10th Maths 2025-26 | Download |
| CBSE 10th English Language & Literature 2025-26 | Download |
| CBSE 10th Communicative English 2025-26 | Download |
| CBSE 10th Arabic 2025-26 | Download |
| CBSE 10th Sanskrit 2025-26 | Download |
| CBSE 10th Hindi Course A 2025-26 | Download |
| CBSE 10th Hindi Course B 2025-26 | Download |
| CBSE 10th Computer Application 2025-26 | Download |
| CBSE 10th Home Science 2025-26 | Download |
Benefits of the Deleted Syllabus of CBSE Class 10
The reduction in syllabus is due to the pandemic, and students can easily cover the remaining portion of the syllabus. The following illustrates how referring to the CBSE class 10 deleted syllabus 2025-26 is extremely important and beneficial for the students.
- The Class 10 CBSE board syllabus will enable pupils to get a thorough comprehension of the ideas involved in numerous topics.
- The marking system for both the theoretical and project work assessments will be made clear to the students.
- With the aid of the CBSE class syllabus 2023–24, candidates will be able to make intelligent choices for their 11th-grade course selections.
- Students can better plan and study for the exam and do well once they are familiar with the material.
Reasons for CBSE Class 10 Deleted Syllabus 2025-26
The CBSE authorities have decided to restructure the syllabus as part of the class 10 deleted syllabus. Some valid reasons for the CBSE class 10th deleted syllabus 2025-26 are mentioned below.
- The restructuring of the syllabus will impart a self-learning culture.
- By revising the syllabus, the board will strengthen the foundational topics and focus on the simpler ones.
- Students can score higher marks by following the revised pattern.
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CBSE restructured Class 10 syllabus by 30% over the years. -
Mathematics has deleted topics like Euclid’s division lemma. -
Science removed 'Periodic Classification of Elements' topics. -
Social Science saw discontinuations in History, Geography, Political Science.