Master CBSE Class 12 Chapter-wise Weightage for 2025 Exams
As you begin your preparation for the CBSE Class 12 board exams in 2025, knowing which chapters hold the most weight in terms of marks is critical to your plan. With increased competition and a strong urge to excel, having a defined strategy can make all the difference.
So, here is your cheat sheet for CBSE class 12 chapter-wise weightage 2025! This blog goes over the most important chapters in each subject, allowing you to concentrate your efforts where they can be most effective.
Class 12 CBSE Maths Chapter-wise Weightage
Mathematics is frequently seen as a game of numbers, and in the CBSE class 12 exams, some chapters receive higher scores than others. Here’s an overview of the chapter weightage for Mathematics:
| Unit Name | Chapters | Marks |
|---|---|---|
| Relation and Functions | Relations and Functions | 4 |
| Inverse Trigonometric Functions | 4 | |
| Algebra | Matrices | 5 |
| Determinants | 5 | |
| Calculus | Continuity and Differentiability | 9 |
| Applications of Derivatives | 4 | |
| Integrals | 9 | |
| Applications of the Integrals | 6 | |
| Differential Equations | 7 | |
| Vectors and Three-dimensional Geometry | Vectors | 7 |
| Three-dimensional Geometry | 7 | |
| Linear Programming | Linear Programming | 5 |
| Probability | Probability | 8 |
Among these, the three chapters with the highest weight are Calculus: Continuity and Differentiability (9 points), Integrals (9 marks), and Differential Equations (7 marks). Mastering these chapters not only improves your score but also boosts your fundamental grasp of mathematics.
Class 12 CBSE Physics Chapter-wise Weightage
Physics, with its rigorous theory and practical applications, requires a thorough understanding of a wide range of topics. The following table shows the weightage of several chapters:
| Unit Name | Chapter Name | Marks |
|---|---|---|
| Electrostatics | Electric Charges and Fields | 5 |
| Electrostatic Potential and Capacitance | 5 | |
| Current Electricity | Current Electricity | 6 |
| Magnetic Effects of Current and Magnetism | Moving Charges and Magnetism | 6 |
| Magnetism and Matter | 5 | |
| Electromagnetic Induction and Alternating Currents | Electromagnetic Induction | 4 |
| Alternating Currents | 2 | |
| Electromagnetic Waves | Electromagnetic Waves | 4 |
| Optics | Ray Optics and Optical Instruments | 10 |
| Wave Optics | 4 | |
| Dual Nature of Radiation and Matter | Dual Nature of Radiation and Matter | 4 |
| Atoms and Nuclei | Atoms | 4 |
| Nuclei | 4 | |
| Electronic Devices | Electronic Devices | 7 |
For Physics, the chapters you should focus on to maximise your scoring opportunity are Optics: Ray Optics and Optical Instruments, with a substantial weight of 10 marks; Current Electricity, scoring 6 marks; and Moving Charges and Magnetism, also at 6 marks. These chapters reveal fundamental principles necessary for higher studies in science and engineering.
Chemistry Class 12 CBSE Chapter-wise Weightage
Chemistry is often viewed as the ‘central science.’ It’s essential not only for academic exams but also for further studies in the fields of health and engineering. The relevant weightage for Chemistry is as follows:
| Unit Name | Chapters Name | Marks |
|---|---|---|
| Physical Chemistry | Solutions | 7 |
| Electrochemistry | 9 | |
| Chemical Kinetics | 7 | |
| Inorganic Chemistry | d- and f-Block Elements | 7 |
| Coordination Compounds | 7 | |
| Organic Chemistry | Haloalkanes and Haloarenes | 6 |
| Alcohols, Phenols and Ethers | 6 | |
| Aldehydes, Ketones and Carboxylic Acid | 6 | |
| Amines | 6 | |
| Biomolecules | 6 |
The year’s notable Chemistry topics are electrochemistry (9 marks), aldehydes, ketones, and carboxylic acid (8 marks), and solutions (7 marks). By prioritising these chapters, you get more points and also expose yourself to a variety of topics vital to any scientific discipline.
CBSE Class 12 English Chapter-wise Weightage
In today’s interconnected world, excellent communication skills are essential. Hence, English is an important subject for your board exams. The chapter weightage is as follows:
| Section | Topics | Marks |
|---|---|---|
| Section A (Reading Skills) | Reading Comprehension Through Unseen PassageDiscursive Passage Case-based Factual Passage |
12 + 10 |
| Section B (Writing Skills) | Notice (up to 50 Words) | 4 |
| Formal/ Informal Invitation & Reply (up to 50 Words) | 4 | |
| Letter Writing (120-150 Words) Application for Job/ Bio Data/Resume/ Letter to the Editor |
5 | |
| Article/ Report Writing (120-150 Words) | 5 | |
| Section C (Literature Text Book and Supplementary Reading Text) | One Extract Out of Two From Poetry (Flamingo) | 6 |
| One Extract Out of Two From Prose (Vistas) | 4 | |
| One Extract Out of Two From Prose (Flamingo) | 6 | |
| Short Answer Type | ||
| Prose & Poetry [Flamingo (5 Out of 6 Questions)] | 2×5 = 10 | |
| Prose [Vistas (2 Out of 3 Questions)] | 2×2 = 4 | |
| Long Answer Type | ||
| Pros/Poetry [Flamingo (1 out of 2 Questions)] | 5 | |
| Vista (1 out of 2 Questions) | 5 | |
In English, concentrate on Reading Comprehension Through Unseen Passages, which has a total weightage of 22 points. Furthermore, the Writing Skills—such as Letter Writing and Article Writing—require significant attention due to their cumulative weight. Excelling in these parts can considerably increase your overall score.
Class 12 CBSE Biology Chapter-wise Weightage
Biology, being the study of living organisms and systems, piques your interest in almost all chapters. However, understanding the following high-weightage chapters is essential to score on boards:-
| Unit Name | Chapters Name | Marks |
|---|---|---|
| Reproduction | Sexual Reproduction in Flowering Plants | 3 |
| Human Reproduction | 8 | |
| Reproductive Health | 5 | |
| Genetics and Evolution | Principles of Inheritance and Variation | 5 |
| Molecular Basis of Inheritance | 10 | |
| Evolution | 5 | |
| Biology and Human Welfare | Human Health and Diseases | 8 |
| Microbes in Human Welfare | 4 | |
| Biotechnology and its Applications | Biotechnology – Principles and Processes | 8 |
| Biotechnology and its Applications | 4 | |
| Ecology and Environment | Organisms and Populations | 4 |
| Ecosystem | 3 | |
| Biodiversity and its Conservation | 3 |
The chapters in Biology that you should not skip are Molecular Basis of Inheritance, which is worth 10 points; Human Reproduction, which is worth 8 points; and Human Health and Diseases, which is also worth 8 points. By learning these principles, you can improve your comprehension of important biological processes.
As you prepare for board exams in 2025, understanding the class 12 chapter-wise weightage in each subject might significantly improve your preparation method.
Concentrating on the most important areas, such as Calculus in Mathematics, Optics in Physics, Electrochemistry in Chemistry, and the Molecular Basis of Inheritance in Biology, allows you to not only improve your grades but also lay a solid foundation for further education.
Remember that while chapter-by-chapter weightage provides a strategic approach, a comprehensive understanding of the subject is vital. Deepening your understanding of each topic gives you the confidence to face any inquiry.
Important Note: The blueprints mentioned here are rooted in the most recent CBSE sample paper. But keep in mind that the real exam might differ. It’s more dependable to focus on unit-wise weightage rather than chapter-specific details. So, as you prepare, make sure to adjust your study plan accordingly for better results.
How Can Extramarks Help?
If you are looking for more help and materials intended exclusively for CBSE Class 12 test preparation, check out Extramarks. Our complete strategy, which includes interactive video courses and live doubt-solving sessions, is designed to greatly improve your learning experience. These resources can be critical in accomplishing your academic goals.
There is always more to learn in today’s ever-changing educational environment. Continue to be curious and proactive in your study. You are well on your way!
Last Updated on February 25, 2025
Reviewed by
Priya Kapoor | AVP - Academics
Priya Kapoor is an accomplished education professional with over 18 years of experience across diverse fields, including eLearning, digital and print publishing, instructional design, and content strategy. As the AVP – Academics at Extramarks, she leads academic teams in creating tailored educational solutions, ensuring alignment with varied curricula across national and international platforms...read more.
