CBSE class 12 chemistry deleted syllabus 2025-26 includes specific topics such as polymers, p-block elements, surface chemistry, and others that will no longer be covered in the upcoming board exam. The revised CBSE board class 12 exam syllabus for Chemistry can be downloaded from the official website.
Table of Contents
- Chapter-wise CBSE Class 12 Chemistry Deleted Syllabus 2025-26
- Deleted Topics from CBSE 12th Chemistry Syllabus 2026
- Updated CBSE Class 12 Chemistry Syllabus 2025-26
- Latest CBSE Class 12 Chemistry Course Structure 2025
- CBSE 12th Chemistry Question Paper Pattern 2026
- Reasons Behind CBSE Class 12 Chemistry Deleted Syllabus 2025-26
- Chemistry Class 12 CBSE Syllabus 2026 Design
- Benefits of the CBSE Class 12th Chemistry Deleted Syllabus 2025-26
- How to Prepare for the CBSE Class 12 Chemistry Exam 2026?
The deleted syllabus for CBSE class 12 Chemistry exam includes topics from units one, five, six, and seven under Chemistry part I and units fifteen and sixteen under Chemistry part II, which are no longer part of the curriculum. As per the CBSE class 12 Chemistry deleted syllabus 2025-26, six chapters have been entirely removed in the latest curriculum. Therefore, students must only focus on preparing for the exam from the ten chapters in the updated syllabus.
Topics from units such as surface chemistry, general principles & processes of isolation of Elements, polymers, p-block elements, and more have been removed as per the revised syllabus for the CBSE class 12 exam 2026 for the Chemistry subject. The CBSE board has updated the Chemistry deleted Syllabus Class 12 PDF on the official website, which includes chapter-wise topics to help candidates engage in self-paced learning and reduce the difficulty level of the exam.
Chapter-wise CBSE Class 12 Chemistry Deleted Syllabus 2025-26
The table below lists the chapters from the CBSE class 12 deleted syllabus 2026 for the Chemistry subject that students do not need to include in their study plans. The units, chapters, and details of topics that are no longer part of the updated syllabus are provided in the table below.
| Unit | Chapter Name | Topics Deleted |
| IV | Surface Chemistry | Entire Chapter |
| V | General Principles and Processes of Isolation of Elements | Entire Chapter |
| VI | p -Block Elements | Entire Chapter |
| XIV | Polymers | Entire Chapter |
| XII | Organic compounds containing Nitrogen | Renamed to Amines (Unit 9) Cyanides and Isocyanides |
Also Check: CBSE Class 12 Sample Papers
Deleted Topics from CBSE 12th Chemistry Syllabus 2026
Students preparing for the upcoming board exam should review the CBSE class 12 Chemistry deleted syllabus 2025-26, and check the deleted topics, mentioned along with the page numbers of the NCERT Chemistry textbooks for the class 12 CBSE board exam. Candidates must study the board-recommended textbooks and also consider reviewing the reference books for CBSE class 12th Chemistry while preparing for the board exam to score good marks.
Below are the unit-wise deleted topics that have been dropped from the latest CBSE class 12 Chemistry syllabus NCERT.
| Unit Name | Pages |
| Part I | |
| Unit 1: The Solid State | 1–34 |
| Unit 5: Surface Chemistry | 123–148 |
| Unit 6: General Principles and Processes of Isolation of Elements | 149–169 |
| Unit 7: The p-Block Elements | 170–214 |
| Part 2 | |
| Unit 15: Polymers | 433–446 |
| Unit 16: Chemistry in Everyday Life | 447–463 |
Updated CBSE Class 12 Chemistry Syllabus 2025-26
The CBSE class 12 Chemistry syllabus 2025 contains the unit-wise chapters, the total weightage, instructions, and guidelines concerning the project work, and more. Students can download the CBSE class 12 syllabus 2025 for Chemistry from the table below and prepare for the upcoming board examination accordingly.
| Particulars | |
| Class 12 CBSE Board Chemistry Syllabus 2025-26 PDF | Download Now |
Latest CBSE Class 12 Chemistry Course Structure 2025
CBSE has implemented changes not only in the CBSE 12th Chemistry syllabus 2025-26 but also in other subjects in the Science stream. Students can further check the Chemistry course structure along with the marks distribution for each unit.
| Unit | Marks |
| Unit I: Solutions | 7 |
| Unit II: Electrochemistry | 9 |
| Unit III: Chemical Kinetics | 7 |
| Unit IV: d-and f-block Elements | 7 |
| Unit V: Coordination Compounds | 7 |
| Unit VI: Haloalkanes and Haloarenes | 6 |
| Unit VII: Alcohols, Phenols and Ethers | 6 |
| Unit VIII: Aldehydes, Ketones and Carboxylic Acids | 8 |
| Unit IX: Amines | 6 |
| Unit X: Biomolecules | 7 |
| Total Marks | 70 |
CBSE 12th Chemistry Question Paper Pattern 2026
As per the CBSE Class 12th Chemistry Exam Pattern 2025-26, the class 12th Chemistry exam will include MCQ, short-answer type, long-answer type, and case study-based questions for 70 marks. In the CBSE class 12 Chemistry question paper for the previous academic year, students had to attempt 33 questions.
The question paper pattern of the class 12 CBSE 2025-26 exam for Chemistry is given in the table below.
|
Sections
|
Question Types
|
Total Number of questions
|
Marks per Question
|
Total Marks
|
| Section-A | Multiple Choice Questions |
16
|
1
|
16
|
| Section-B | Very Short Answer Type Questions |
5
|
2
|
10
|
| Section-C | Short Answer Type Questions |
7
|
3
|
21
|
| Section-D | Long Answer Type Questions |
2
|
4
|
8
|
| Section-E | Case Study/Application-Based Questions |
3
|
5
|
15
|
Also Check: CBSE Class 12th Exam Pattern 2025-26
Reasons Behind CBSE Class 12 Chemistry Deleted Syllabus 2025-26
The Board has implemented the Chemistry deleted syllabus for class 12 CBSE 2025-26, a decision to bring back the pre-pandemic curriculum. The primary objective of removing certain chapters and units is to restructure the syllabus back to the pre-pandemic times.
The board has also updated the CBSE class 12th blueprint 2025-26, which students must review before reviewing the syllabus, as it will help them to learn about the chapter-wise evaluation scheme and overall structure of the upcoming board exam. The following are a few reasons that the CBSE board issued the deleted syllabus of the CBSE class 12 exam 2025 for Chemistry.
- The Chemistry class 12 deleted syllabus rationalisation has been implemented to implement a more concept-based curriculum for students, which will help them score higher in the Board examinations.
- Students can now self-learn as the topics that complicate the subject have been boxed towards the deleted syllabus of Chemistry class 12 CBSE 2025-26.
- Moreover, components of some topics are already present in some units and overlap, which is why the Board has put those chapters in the CBSE class 12 Chemistry deleted syllabus 2025-26 portion.
- At the same time, the updated syllabus version does not include outdated topics that are no longer relevant.
Chemistry Class 12 CBSE Syllabus 2026 Design
The authorities must focus on the key pointers while designing the syllabus for the Board exams. Students can also refer to the CBSE Class 12 question bank and check the question-wise topic allocation from the syllabus.
The pointers below show the design of the Chemistry syllabus for the CBSE class 12 exam 2026.
- The students must be able to recall, learn, and recognise concepts they have learned through the syllabus and demonstrate them in their papers.
- Hence, the paper is designed in alignment with the syllabus, which aims to equip students with interpretational qualities. Students must focus on this bit, as it holds around 40% of the total weightage in the syllabus.
- Applying: Once students can learn and understand concepts from the syllabus, they must use them in real life. Techniques and rules must be used per the Class 12 Chemistry Syllabus 2025-26.
- Analysing, Evaluating, and Creating: Examine and break information into bits by recognising objectives or causes. Make inferences and draw evidence to support generalisations. A 30% weightage is based on this pointer.
- No Chapter-wise weightage: Students must note that there is no specific chapter-wise weightage, and preparations should be made focusing on all chapters.
- Internal Choices: Importantly, all sections will have 33% internal choices.
Benefits of the CBSE Class 12th Chemistry Deleted Syllabus 2025-26
The Board has implemented and restructured the CBSE class 12 Chemistry deleted syllabus 2025-26, and students will notice that it is beneficial in many ways for CBSE class 12 preparations. The important benefits of reviewing the CBSE class 12 Chemistry deleted syllabus 2026 are as follows.
- Firstly, students can focus on important topics and do not need to go through overlapping topics.
- Also, rationalizing through the class 12 CBSE Board Chemistry deleted syllabus 2025-26 has improved the paper pattern's overall scoring.
- Topics in the current syllabus focus on present-day learning and future outcomes.
- It is now more formulaic and concept-based.
- Students can solve problems better by deleting specific chapters in the syllabus.
- The prime objective is to focus on the subject’s role in health, nutrition, environment, population, weather, industries, and agriculture sectors.
How to Prepare for the CBSE Class 12 Chemistry Exam 2026?
Students will require an effective study plan to prepare for the CBSE 12th Chemistry exam. The following are some of the CBSE class 12 preparation tips which students can follow to score better marks.
- Students must understand the concepts and focus on obtaining in-depth clarity of the subject matter.
- They must review the updated syllabus and cover all the chapters & topics.
- Students must answer questions in the books, related to each chapter, after completing it.
- They can check the exam pattern and sample papers to get a clear insight into the marking scheme and question types.
- Students must frequently practice formulas, important theories, and diagrams for easy memorisation in the exam.
- They can prepare notes for the last-minute exam preparation.
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