CBSE Deleted Syllabus Class 12 2025-26: Physics, Chemistry, Maths, Hindi, English
The Central Board of Secondary Education is responsible for releasing and making changes in the CBSE 12th syllabus. The board updated the CBSE Class 12 syllabus for the current academic year 2025-26. Students can download the deleted syllabus of Class 12 CBSE through the official website, cbseacademic.nic.in. This year, the board has not reduced the CBSE Class 12 syllabus 2025.
This Story also Contains
- CBSE Class 12 Syllabus 2025-26
- CBSE Class 12 Deleted Syllabus
- Deleted Topics of CBSE 12th Hindi Syllabus
- Deleted Topics of CBSE 12th Mathematics Syllabus
- Deleted Topics of CBSE 12th Accountancy Syllabus
- Deleted Topics of CBSE 12th Chemistry Syllabus
- Deleted Topics of CBSE 12th Physics Syllabus
Below, we have given the deleted topics of the CBSE 12th syllabus 2025-26. For subjects where there are no changes in the syllabus, we have given the deleted syllabus of the CBSE 2020-21 academic year. The CBSE board is known for its well-structured syllabus. The board will conduct the CBSE 12th exams from February 17, 2026, onwards. Students who are looking for a deleted syllabus of Class 12 CBSE must check the entire article.
CBSE Class 12 Syllabus 2025-26
Students should check the topics in detail to understand the concepts subject-wise of the complete Class 12th CBSE syllabus. Below, we have given the links to know more about the CBSE 12th Class syllabus 2025-26:
CBSE Class 12 Deleted Syllabus
Below, we have compared the CBSE 12th syllabus with the previous year and listed the deleted topics of the Class 12 syllabus. Students can check the section below to know more about the CBSE 12th deleted syllabus.
Deleted Topics of CBSE 12th English Syllabus
English is one of the most important subjects of CBSE Class 12. Along with that, the CBSE 12th English syllabus is one of the highest-scoring subjects in the exam. Students must complete the CBSE syllabus 2026 at least one or two months before the exam.
Removed Topics
Creative Writing Skills:
In the Notice section - Organisation of Ideas: 1 Mark
In the Formal/Informal Invitation and Reply section - Organisation of Ideas: 1 Marks
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Attempt NowAlso, we have given the deleted topics of the CBSE Class 12 English syllabus from the 2020 curriculum
CBSE Class 12 English Deleted Topics
Reading
Note Making & Summarising
Literature
FLAMINGO
1. Poets and Pancakes
A Roadside Stand
2. The Interview
3. Going Places
VISTAS
1. The Tiger King
2. Journey to the end of the Earth
3. Memories of Childhood
Writing
1. Poster making
2. Business or official letters for making enquiries, registering complaints, asking for and giving orders and sending replies.
3. Speech, Debate
Deleted Topics of CBSE 12th Hindi Syllabus
In the CBSE Hindi syllabus 2025, there are no changes. The subject has all topics included; hence, it is advisable to complete the CBSE Class 12 syllabus 2025 as soon as possible. After that, it would be better to start working on the CBSE 12th Hindi sample paper to practice better for the exams.
Also, we have given the deleted topics of the CBSE Class 12 Hindi syllabus from the 2020 curriculum
CBSE Class 12 Hindi deleted topics
Deleted Topics of CBSE 12th Mathematics Syllabus
In the CBSE 12th maths syllabus 2025-26, there are no changes from the previous year. Maths is one of the most important subjects in Class 12. Students must complete the CBSE maths 12th syllabus and then start working on the 12th Maths sample paper.
Also, we have given the deleted topics of the CBSE Class 12 Maths syllabus from the 2020 curriculum
CBSE Class 12 Maths deleted topics
Unit/Chapters | Syllabus Reduced |
|---|---|
Unit 1: Relations and Functions | |
Relations and Functions | composite functions, inverse of a function. |
Inverse Trigonometric Functions | Graphs of inverse trigonometric functions: Elementary properties of inverse trigonometric functions |
Unit 2: Algebra | |
Matrices | existence of non-zero matrices whose product is the zero matrix. Concept of elementary row and column operations. proof of the uniqueness of the inverse, if it exists. |
Determinants | properties of determinants, Consistency, inconsistency and number of solutions of a system of linear equations by examples, |
Unit-III: Calculus | |
Continuity and Differentiability | Rolle’s and Lagrange's Mean Value Theorems (without proof) and their geometric interpretation. |
Applications of Derivatives | rate of change of bodies, use of derivatives in approximation |
Integrals | ∫ √?x2 + ?? + ? dx, ∫(?? + ?)√??2 + ?? + ? dx Definite integrals as a limit of a sum |
Applications of the Integrals | Area between any of the two above-mentioned curves |
Differential Equations | formation of a differential equation whose general solution is given. Solutions of linear differential equations of the type: dx/dy+px=q, where p and q are functions of y or constants. |
Unit-IV: Vectors and Three-Dimensional Geometry | |
Vectors | scalar triple product of vectors. |
Three-dimensional Geometry | Angle between (i) two lines, (ii) two planes, (iii) a line and a plane |
Unit-V: Linear Programming | |
Linear Programming | mathematical formulation of L.P. problems (unbounded) |
Unit-VI: Probability | |
Probability | mean and variance of random variables. Binomial probability distribution. |
Also, read:
CBSE Class 12th Syllabus: Subjects & Chapters
Select your preferred subject to view the chapters
Deleted Topics of CBSE 12th Accountancy Syllabus
The CBSE Class 12 Accountancy syllabus 2025-26 is similar to the previous year’s syllabus. Students can check the Class 12 CBSE accountancy syllabus here. After completing the CBSE syllabus, start solving the CBSE Class 12 Accountancy sample papers. Also, we have given the deleted topics of the CBSE Class 12 accountancy syllabus from the 2020 curriculum.
CBSE Class 12 Accountancy deleted topics
Part A: Accounting for Not-for-Profit Organisations, Partnership Firms and Companies
Unit 2: Accounting for Partnership Firms
Accounting for Partnership Firms - Reconstitution and Dissolution.
Admission of a partner - adjustment of capital accounts and preparation of balance sheet.
Retirement and death of a partner: adjustment of capital accounts. Preparation of the loan account of the retiring partner.
Preparation of the deceased partner’s capital account and his executor’s account.
Unit - 3 Accounting for Companies
Accounting for Debentures
Redemption of debentures-Methods: Lump sum, draw of lots.
Deleted Topics of CBSE 12th Biology Syllabus
The board released the CBSE Class 12 biology syllabus 2025-26. This year, the board has not deleted topics from the CBSE Class 12 syllabus. Students must complete the Class 12 CBSE syllabus at least one or two months before the exams. After that, try solving the CBSE 12th biology sample paper . Also, we have given the deleted syllabus of biology from the curriculum 2020.
CBSE Class 12 Biology Deleted Topics
Under Unit-VI Reproduction
Chapter 1: Reproduction in Organisms
Reproduction is a characteristic feature of all organisms for the continuation of the species; modes of reproduction - asexual and sexual reproduction; asexual reproduction - binary fission, sporulation, budding, gemmule formation, fragmentation; vegetative propagation in plants.
Under Unit-VII Genetics and Evolution
Chapter-7: Evolution
Origin of life; biological evolution and evidence for biological evolution (palaeontology, comparative anatomy, embryology and molecular evidence); Darwin’s contribution, modern synthetic theory of evolution; mechanism of evolution - variation (mutation and recombination) and natural selection with examples, types of natural selection; Gene flow and genetic drift; Hardy – Weinberg’s principle; adaptive radiation; human evolution.
Under: Unit VIII Biology and Human Welfare
Chapter 9: Strategies for Enhancement in Food Production
Animal husbandry, Plant breeding, tissue culture, and single-cell protein.
Under Unit-X Ecology and Environment
Chapter-14: Ecosystem
Ecosystems: Patterns, components, productivity and decomposition; energy flow; pyramids of number, biomass, energy; nutrient cycles (carbon and phosphorus); ecological succession; ecological services - carbon fixation, pollination, seed dispersal, oxygen release (in brief).
Chapter 16: Environmental Issues
Air pollution and its control; water pollution and its control; agrochemicals and their effects; solid waste management; radioactive waste management; greenhouse effect and climate change impact and mitigation; ozone layer depletion; deforestation; exemplifying case study as a success story addressing the environmental issue(s).
Also, check - CBSE Date Sheet 2026 Class 12
Deleted Topics of CBSE 12th Chemistry Syllabus
The CBSE Class 12 Chemistry syllabus 2025 is the same as the previous year’s syllabus. Students must complete the 12th Class chemistry syllabus CBSE and start the revision as soon as possible. After completing the revision, start solving the CBSE 12th chemistry sample papers 2025 to score better in the exams. Also, we have given the deleted topics of the CBSE Class 12 chemistry syllabus from the 2020 curriculum.
CBSE Class 12 Chemistry deleted topics
Solid State | Electrical and magnetic properties. Band theory of metals, conductors, semiconductors and insulators and n-type and p-type semiconductors. |
Solutions | Abnormal molecular mass, Van't Hoff factor |
Electrochemistry | Lead accumulator, fuel cells, corrosion, law of electrolysis (elementary idea), dry cell- electrolytic cells and Galvanic cells, |
Chemical Kinetics | Concept of collision theory (elementary idea, no mathematical treatment, activation energy, Arrhenius equation |
Surface Chemistry | emulsion - types of emulsions, catalysis: homogenous and heterogeneous, activity and selectivity of solid catalysts; enzyme catalysis, |
General Principles and Processes of Isolation of Elements | Entire Unit |
p-Block Elements | Preparation and properties of Phosphine, Sulphuric Acid: industrial process of manufacture, Oxides of Nitrogen (Structure only); Phosphorus - allotropic forms, compounds of Phosphorus: Preparation and properties of Halides and Oxo acids (elementary idea only). |
d and f Block Elements | Chemical reactivity of lanthanoids, Actinoids -Electronic configuration, oxidation states and comparison with lanthanoids. Preparation and properties of KMnO4 and K2Cr2O7 |
Coordination Compounds | Structure and stereoisomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological systems). |
Haloalkanes and Haloarenes | Uses and environmental effects of -dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT. |
Alcohols, Phenols and Ethers | uses with special reference to methanol and ethanol. |
Aldehydes, Ketones and Carboxylic Acid | — |
Amines | Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry. |
Biomolecules | Oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen), importance of carbohydrates. Vitamins– classification and functions. Enzymes. Hormones - Elementary idea excluding structure. |
Polymers | Entire Unit |
Chemistry in Everyday Life | Entire Unit |
Deleted Topics of CBSE 12th Physics Syllabus
The CBSE board released the Class 12 physics syllabus 2025-26. The board has not deleted topics in the 12th Class physics syllabus. Students should complete the CBSE 12th syllabus 2025 physics to get familiar with the topics. After that, start solving the CBSE Class 12 physics sample papers to score better in the exams. Below, we have given the deleted topics of the CBSE Class 12 physics syllabus from the 2020 curriculum.
CBSE Class 12 Physics deleted topics
Chapter 1 Electric charges and fields
uniformly charged thin spherical shell (field inside and outside).
Chapter-3 Current Electricity
Carbon resistors, colour code for carbon resistors; series and parallel combinations of resistors
Chapter 4 Moving Charges and Magnetism
Cyclotron
Chapter 5 Magnetism and Matter
Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis, and torque on a magnetic dipole (bar magnet) in a uniform magnetic field.
Para-, dia- and ferromagnetic substances, with examples. Electromagnets and factors affecting their strengths, permanent magnets.
Chapter-7 Alternating Current
Power factor, wattless current.
Chapter 8 Electromagnetic Waves
Basic idea of displacement current
Chapter 9 Ray Optics and Optical Instruments
Reflection of light, spherical mirrors,(recapitulation) mirror formula
Scattering of light - blue colour of the sky and reddish appearance of the sun at sunrise and sunset.
Resolving power of microscope and astronomical telescope, polarisation, plane polarised light, Brewster's law, uses of plane polarised light and Polaroids.
Chapter 11 Dual Nature of radiation and matter
Davisson-Germer experiment
Chapter 13 Nuclei
Radioactivity, alpha, beta and gamma particles/rays and their properties; radioactive decay law, half-life, and mean life
binding energy per nucleon and its variation with mass number
Chapter 14 Semiconductor Electronics:
- Materials, Devices and Simple Circuits: Zener diode and its characteristics, Zener diode as a voltage regulator.
How to download the CBSE Class 12 syllabus 2025-26?
Check the steps to download the CBSE 12th syllabus 2025 PDF:
- Go to the official website, cbseacademic.nic.in.
- From the dashboard, click on the ‘Curriculum’ section.
- From the dropdown menu, select the year.
- Now, click on the subject and download the CBSE syllabus 2025-26.
Related Links:
Frequently Asked Questions (FAQs)
Q: Is CBSE reduced syllabus for 2025-26?
A:
No, the board has not reduced the CBSE 12th syllabus for 2025-26.
Q: Has CBSE released 2025-26 syllabus Class 12?
A:
Yes, the board released the latest CBSE class 12 syllabus 2025-26 through the official website at cbseacademic.nic.in.
Q: Which topics are deleted from CBSE 12th English syllabus 2025-26?
A:
The below-given topics are deleted from the English class 12 syllabus:
Creative Writing Skills:
In Notice section - Organisation of Ideas: 1 Marks
In Formal/Informal Invitation and Reply section - Organisation of Ideas: 1 Marks
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Questions related to CBSE Class 12th
On Question asked by student community
Have a question related to CBSE Class 12th ?
Yes, you can switch from Science in Karnataka State Board to Commerce in CBSE for 12th. You will need a Transfer Certificate from your current school and meet the CBSE school’s admission requirements. Since you haven’t studied Commerce subjects like Accountancy, Economics, and Business Studies, you may need to catch up before or during 12th. Not all CBSE schools accept direct admission to 12th from another board, so some may ask you to join Class 11 first. Make sure to check the school’s rules and plan your subject preparation.
Hello
For the 12th CBSE Hindi Medium board exam, important questions usually come from core chapters like “Madhushala”, “Jhansi ki Rani”, and “Bharat ki Khoj”.
Questions often include essay writing, letter writing, and comprehension passages. Grammar topics like Tenses, Voice Change, and Direct-Indirect Speech are frequently asked.
Students should practice poetry questions on themes and meanings. Important questions also cover summary writing and translation from Hindi to English or vice versa.
Previous years’ question papers help identify commonly asked questions.
Focus on writing practice to improve handwriting and presentation. Time management during exams is key to answering all questions effectively.
Hello,
If you want to improve the Class 12 PCM results, you can appear in the improvement exam. This exam will help you to retake one or more subjects to achieve a better score. You should check the official website for details and the deadline of this exam.
I hope it will clear your query!!
For the 2025-2026 academic session, the CBSE plans to conduct board exams from 17 February 2026 to 20 May 2026.
You can download it in pdf form from below link
all the best for your exam!!
Hii neeraj!
You can check CBSE class 12th registration number in:
- Your class 12th board exam admit card. Please do check admit card for registration number, it must be there.
- You can also check the registration number in your class 12th marksheet in case you have got it.
- Alternatively you can also visit your school and ask for the same in the administration office they may tell you the registration number.
Hope it helps!
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