CBSE Class 12 Deleted Syllabus 2025-26
CBSE Class 12 Deleted Syllabus 2025-26:- The Central Board of Secondary Education (CBSE) has announced the Class 12 Board Exam dates for the academic session 2025-26. To make sure students are not overloaded with unnecessary content, the board has once again made changes to the syllabus and removed some topics and chapters from different subjects.
The CBSE Class 12 Deleted Syllabus 2025-26 includes cuts across all major streams, Science, Commerce, and Arts, covering key subjects such as Mathematics, Physics, Accountancy, Political Science, Geography, Psychology, and more. It is very important for students to know the CBSE Class 12 Deleted Syllabus clearly so they do not waste time preparing chapters or questions that will not be part of the final exam. Whether it is the deleted exercise of Maths Class 12, the deleted syllabus of Class 12 Physics, or other subjects, being aware of these changes will help students focus on the right topics. Below, you can check the complete stream-wise and subject-wise deleted syllabus of Class 12 CBSE 2025-26.
Check Out: CBSE Class 12 Books
CBSE Class 12 Deleted Syllabus 2025-26
The official CBSE Class 12 board exam date sheet for the 2025-26 academic session is expected to be announced in the second week of November 2025 on the official CBSE websites, CBSE.nic.in and CBSE.gov.in. As per the current schedule, the Class 12 exams are likely to begin from 17th February 2026 and continue till around 4th April 2026. Along with this update, CBSE has also reduced the syllabus for Class 12 students to ease their preparation load. The deleted topics and chapters vary across Science, Commerce, and Arts streams, and students can check the detailed subject-wise deleted syllabus below.
CBSE Class 12 Science Subjects Deleted Syllabus 2025
Class 12 Science students need a clear plan to prepare well for their board exams. CBSE has removed some parts from subjects like Physics, Chemistry, Biology, and Maths for the 2025 exams. Knowing the deleted syllabus of Class 12 Science helps students focus only on what is important. This makes preparation easier and avoids confusion while revising.
CBSE Class 12 Biology Deleted Syllabus
For the CBSE Class 12 Biology paper 2025-26, some chapters and topics have been removed to make the syllabus more focused. Topics like Strategies for Enhancement in Food Production and Environmental Issues are no longer part of the CBSE Class 12 deleted syllabus. This helps students concentrate more on important areas like Genetics, Biotechnology, and Ecology.
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Unit |
Chapter |
Deleted Topics / Portions |
|
Unit VI – Reproduction |
Chapter 1: Reproduction in Organisms |
Entire Chapter Deleted – Includes lifespan, modes of reproduction (asexual & sexual), binary fission, budding, spore formation, and vegetative propagation. |
|
Unit VIII – Biology and Human Welfare |
Chapter 9: Strategies for Enhancement in Food Production |
Entire Chapter Deleted – Covers animal husbandry, dairy farm management, poultry, fishery, plant breeding techniques, single-cell protein, and tissue culture. |
|
Unit X – Ecology & Environment |
Chapter 13: Organisms and Populations |
Topics removed – Organism and its Environment, Major Abiotic Factors (temperature, water, light, soil), Responses to Abiotic Factors (conformers, regulators, partial regulators, migration, hibernation), Adaptations (structural, physiological, behavioural). |
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Chapter 14: Ecosystem |
Ecological Succession and Nutrient Cycling deleted. |
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Chapter 16: Environmental Issues |
Entire Chapter Deleted – Topics removed include air pollution and control measures, water pollution and its control, agrochemical impacts, solid waste and radioactive waste management, greenhouse effect, global warming, climate change mitigation strategies, ozone depletion, deforestation, and case studies on environmental success stories. |
CBSE Class 12 Chemistry Deleted Syllabus
The deleted syllabus of CBSE Class 12 Chemistry 2025-26 has reduced a few portions from both Organic and Physical Chemistry. For example, some parts of Solid State and Polymers are removed. With these changes, the syllabus now highlights the major scoring units such as Electrochemistry, Chemical Kinetics, and Coordination Compounds.
1. Complete Chapters Deleted
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Surface Chemistry
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General Principles and Processes of Isolation of Elements
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p-Block Elements
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Polymers
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Chemistry in Everyday Life
2. Topics Modified / Renamed
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Organic Compounds containing Nitrogen → Now renamed as Amines (Unit 9)
3. Topics Removed
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Cyanides and Isocyanides
Check Out: Class 12 Question Banks
CBSE Class 12 Maths Deleted Syllabus
In the case of Mathematics, students should note the deleted exercise of Maths Class 12, especially from topics like Relations and Functions and Three-Dimensional Geometry. The CBSE Class 12 deleted syllabus for Maths 2025-26 allows students to focus more on Calculus, Probability, and Vectors, which carry high weightage in exams.
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Unit |
Chapter |
Deleted Topics |
|
Relations and Functions |
Relations and Functions |
Composite functions, Inverse of a function |
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Inverse Trigonometric Functions |
Elementary properties of inverse trigonometric functions |
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Algebra |
Matrices |
Concept of elementary row and column operations |
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Determinants |
Properties of determinants |
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Calculus |
Continuity and Differentiability |
Derivative of a composite function; Rolle’s and Lagrange’s Mean Value Theorems (without proof) and their geometric interpretation |
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Applications of Derivatives |
Tangents and normals; Use of derivatives in approximation |
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Integrals |
Definite integrals as a limit of a sum |
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Applications of Integrals |
Area between any two of the above-mentioned curves |
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Vectors & 3D Geometry |
Vectors |
Scalar triple product of vectors |
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Three-Dimensional Geometry |
Coplanar lines; Cartesian and vector equation of a plane; Angle between (i) two lines, (ii) two planes, (iii) a line and a plane; Distance of a point from a plane |
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|
Linear Programming |
Linear Programming |
Different types of L.P. problems; Mathematical formulation of L.P. problems |
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Probability |
Probability |
Variance of a random variable |
CBSE Class 12 Physics Deleted Syllabus
Physics also has some changes in the deleted syllabus of Class 12 Physics. Portions from Communication Systems and some derivations from Electromagnetic Waves have been removed. This means that students can now give extra time to crucial chapters like Optics, Current Electricity, and Modern Physics.
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Electricity |
Chapter–3: Current Electricity |
Electrical Resistance, Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors, metre bridge, Potentiometer - principle and its applications to measure potential difference and for comparing EMF of two cells; measurement of internal resistance of a cell |
|
Magnetic Effects of Current and Magnetism |
Chapter–4: Moving Charges and Magnetism |
Cyclotron |
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Magnetic Effects of Current and Magnetism |
Chapter–5: Magnetism and Matter |
magnetic dipole moment of a revolving electron |
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Electromagnetic Induction and Alternating Currents |
Chapter–6: Electromagnetic Induction |
Eddy currents |
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Electromagnetic Induction and Alternating Currents |
Chapter–7: Alternating Current |
LC oscillations |
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Optics |
Chapter–9: Ray Optics and Optical Instruments |
Scattering of the light-blue colour of the sky and the reddish appearance of the sun at sunrise and sunset |
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Optics |
Chapter–10: Wave Optics |
resolving power of microscope and astronomical telescope, Polarisation, plane polarised light, Brewster's law, uses of plane polarised light and Polaroids |
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Dual Nature of Radiation and Matter |
Chapter 11: Dual Nature of Radiation and Matter |
Davisson-Germer experiment |
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Atoms and Nuclei |
Chapter–13: Nuclei |
Radioactivity, alpha, beta and gamma particles/rays and their properties; radioactive decay law. |
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Electronic Devices |
Chapter–14: Semiconductor Electronics: Materials, Devices and Simple Circuits |
Special purpose p-n junction diodes: LED, photodiode, solar cell and Zener diode and their characteristics, Zener diode as a voltage regulator |
CBSE Class 12 Commerce Subjects DELETED Syllabus 2025
For Commerce students, CBSE has also made some changes in subjects like Accountancy, Business Studies, and Economics. The deleted syllabus of Class 12 Commerce tells students which topics and chapters are not a part of the 2025 exams.
CBSE Class 12 Accountancy Deleted Syllabus 2025-26
When it comes to preparing for board exams, knowing what topics to study is just as important as knowing what not to. The CBSE Class 12 Accountancy Deleted Syllabus 2025-26 helps students focus on the chapters and concepts that really matter for the exam. By removing certain parts from the syllabus, CBSE has reduced the extra load so that students can plan their studies in a smarter way.
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Section / Unit |
Chapter Removed |
Pages Affected |
Details of Deletion |
|
Accountancy – Part A: Accounting for Not-for-Profit Organisation |
Chapter 1: Accounting for Not-for-Profit Organisation |
1–60 |
Entire chapter dropped |
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Accountancy – Computerised Accounting System |
Chapter 5: Database Management System for Accounting |
125–150 |
Entire chapter dropped |
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Accountancy – Company Accounts & Analysis of Financial Statements |
– |
– |
No topics deleted; syllabus remains unchanged |
CBSE Class 12 Economics Deleted Syllabus 2025-26
Check out the CBSE Class 12 Economics Deleted Syllabus 2025-26 below:-
Government Budget and the Economy
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Revenue deficit, fiscal deficit, and primary deficit – their meanings are no longer part of the syllabus.
Balance of Payments
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Removed discussion on the benefits and drawbacks of flexible vs. fixed exchange rates.
Current Challenges Facing the Indian Economy
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Deleted topics include:
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Poverty: both absolute and relative; a critical review of main poverty alleviation programmes.
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Infrastructure: definition and types, case studies on energy and health, associated problems and policy responses.
Check Out: Commerce Class 12 Books
CBSE Class 12 Arts Subject DELETED Syllabus 2025
Arts students also need to stay updated with the latest changes in their syllabus. In 2025, CBSE has deleted some topics from subjects such as History, Political Science, Geography, and others. The deleted syllabus of Class 12 Arts helps students understand what they can skip in their preparation.
CBSE Class 12 Hindi Deleted Syllabus 2025-26
The CBSE Class 12 Hindi deleted syllabus for 2025-26 mainly focuses on reducing extra stories, poems, and lengthy prose portions that were earlier part of the curriculum. By removing these chapters, the board aims to give students more time to revise important grammar rules, writing skills, and core literature.
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Book / Section |
Chapter / Topic |
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आरोह भाग-2 (काव्य खंड) |
गजानन माधव मुक्तिबोध - सहर्ष स्वीकार है (पूरा पाठ) |
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फिराक गोरखपुरी - ग़ज़ल |
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आरोह भाग-2 (गद्य खंड) |
विष्णु खरे - चालीस बैंगन यानि हम सब (पूरा पाठ) |
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रज़िया सज्जाद ज़हीर - नमक (पूरा पाठ) |
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वितान भाग-2 |
एम फ्रैंक - डायरी के पन्ने |
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अंतर्रा भाग-2 |
सूर्यकांत त्रिपाठी निराला - गीत गाने दो मुझे (घटाया गया पाठ का अंश और प्रश्न) |
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विष्णु खरे - एक कम, सच (पूरा पाठ) |
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केदारनाथ सिंह - रामदारीका (पूरा पाठ) |
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घनानंद - संयोग (घटाया गया पाठ का अंश और प्रश्न) |
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ब्रजनारायण व्यास - कच्चा चिट्ठा (पूरा पाठ) |
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रामविलास शर्मा - यथार्थ चेतना विश्वम् (पूरा पाठ) |
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अंतराल भाग-2 |
संजीव - अरोहण |
CBSE Class 12 History Deleted Syllabus 2025-26
The CBSE Class 12 History syllabus for 2025-26 has undergone changes with the removal of some chapters and themes to make the curriculum more concise and manageable. Important deletions include topics from Themes in Indian History Part II and several chapters that earlier covered Mughal history, colonial town planning, and partition through oral sources. Below is the list of chapters/topics removed from the syllabus:
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Theme 9: Kings and Chronicles; the Mughal Courts (C. Sixteenth–Seventeenth Centuries) – Full Chapter (Pages 224–254)
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Chapter 9: The Mughal Court – Reconstructing Histories through Chronicles
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Chapter 12: Colonialism and Indian Towns – Town Plans and Municipal Reports
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Chapter 14: Partition through Oral Sources
CBSE Class 12 Geography Deleted Syllabus 2025-26
The CBSE Class 12 deleted syllabus in Geography 2025-26 includes changes in both physical and human geography sections. Certain chapters related to resource distribution, case studies, and regional examples have been removed. With these cuts in the deleted syllabus of Class 12 CBSE 2025-26, students can spend more effort on topics like natural resources, map-based questions, environmental concerns, and geographical planning, which are essential for exams.
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Unit / Book |
Chapter |
Deleted Topics / Chapters |
|
Fundamentals of Human Geography |
Chapter 1: Human Geography Nature and Scope |
Human Geography Through the Corridors of Time, Last Paragraph of Fields and Sub-Fields of Human Geography |
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Chapter 2: The World Population Distribution, Density and Growth |
Table 2.1, 2.2, 2.3, Activity on Migration News Collage, Trends in Population Growth, Doubling Time of World Population, Spatial Pattern of Population Change, Impact of Population Change, Fig. 2.2 |
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Chapter 3: Population Composition |
Full Chapter |
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Chapter 6: Secondary Activities |
Traditional Large Scale Industrial Regions, The Ruhr Coal Field, Iron and Steel Industry, Cotton Textile Industry |
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Chapter 7: Tertiary and Quaternary Activities |
Factors Affecting Tourism, Collage and Activity on Medical Tourism |
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Chapter 9: International Trade |
Important Aspects of International Trade, Regional Trade Blocs, Figures 9.1 and 9.3 |
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Chapter 10: Human Settlements |
Full Chapter |
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Appendix 1 |
Full Appendix |
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India: People and Economy |
Chapter 2: Migration – Types, Causes and Consequences |
Full Chapter |
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Chapter 3: Human Development |
Full Chapter |
|
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Chapter 4: Human Settlements |
Classification of Towns on the Basis of Population Size, Fig. 4.5, Tables 4.2 and 4.3 |
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Chapter 7: Mineral and Energy Resources |
Box Information, Fig. 7.4 |
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Chapter 8: Manufacturing Industries |
Full Chapter |
|
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Chapter 10: Transport and Communication |
Box Information and First Three Lines from page 121 |
Check Out: Class 12 Sample Papers
CBSE Class 12 Political Science Deleted Syllabus 2025-26
The CBSE Class 12 deleted syllabus for Political Science 2025-26 has reduced some chapters dealing with global organisations and detailed policy case studies. This change ensures that students can better focus on understanding the Indian Constitution, democracy, governance, and international relations. Being aware of the deleted syllabus of class 12 CBSE 2025-26 gives clarity on which sections to prioritise, making preparation more structured and less time-consuming.
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Book / Unit |
Chapter |
Deleted Topics / Chapters |
|
Contemporary World Politics |
Chapter 1: The Cold War Era |
Full Chapter |
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Chapter 3: US Hegemony in World Politics |
Full Chapter |
|
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Politics in India Since Independence |
Chapter 2: Era of One-party Dominance |
Full Page |
|
Full 8 Pages |
||
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Chapter 3: Politics of Planned Development |
Content with Visual |
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Exercise Questions 7, 8 and 9 |
||
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Chapter 6: The Crisis of Democratic Order |
Full Chapter “Controversies regarding Emergency” |
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Chapter 7: Rise of Popular Movements |
Full Chapter |
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Chapter 9: Recent Developments in Indian Politics |
“Gujarat Riots” |
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Question 1(f) |
CBSE Class 12 Psychology Deleted Syllabus 2025-26
In Psychology, the CBSE Class 12 deleted syllabus for 2025-26 includes the removal of certain case studies, detailed experiments, and specific practical exercises. These changes reduce the pressure on students and streamline the course around key concepts like human development, cognitive processes, and mental well-being.
|
Chapter |
Page No. |
Dropped Topics / Chapters |
|
Chapter 5: Therapeutic Approaches |
94–96, 101–102 |
Psychodynamic Therapy, Biomedical Therapy |
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Chapter 6: Attitude and Social Cognition |
119–125 |
Social Cognition, Schemas and Stereotypes, Impression Formation, Explaining Behaviour of Others through Attributions, Behaviour in the Presence of Others, Pro-social Behaviour |
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Chapter 7: Social Influence and Group Processes |
138–149 |
Conformity, Obedience and Compliance, Cooperation and Competition, Social Identity, Inter-group Conflicts, Conflict Resolution Strategies |
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Chapter 8: Psychology and Life |
152–176 |
Full Chapter |
|
Chapter 9: Developing Psychological Skills |
177–195 |
Full Chapter |
Read More: Deleted Syllabus of Class 12 CBSE 2024-25 Exam
CBSE Class 12 Deleted Syllabus FAQs
Q1. What is the deleted syllabus of CBSE Class 12 for 2025?
The deleted syllabus includes the topics and chapters removed by CBSE from Science, Commerce, and Arts subjects for the 2025 board exams.
Q2. Why does CBSE delete some parts of the syllabus?
CBSE removes certain topics to reduce the load on students and keep the syllabus updated with current learning needs.
Q3. Where can I find the deleted syllabus of Class 12 Science 2025?
You can check the official CBSE website or download the PDF that lists the deleted portions of Physics, Chemistry, Biology, and Maths.
Q4. Which subjects in Commerce stream have deleted topics for 2025?
Commerce subjects like Accountancy, Business Studies, and Economics have certain topics removed for the 2025 board exams.
Q5. Does the Arts stream also have a deleted syllabus?
Yes, CBSE has removed some chapters and topics from subjects like History, Political Science, and Geography for Class 12 Arts students.
