Physics Wallah

CBSE Chemistry High Weightage Chapters for Board Exam Revision

For the CBSE Class 12th Chemistry Exam 2026, focus first on high-weightage chapters like Electrochemistry and Aldehydes, Ketones, and Carboxylic Acids. Use a strategic revision order based on marks distribution to maximize scoring potential. Smart planning saves time, improves accuracy, and boosts final board results.
authorImageSoumya Tiwari25 Feb, 2026
CBSE Chemistry High Weightage Chapters for Board Exam Revision

CBSE Class 12th chemistry exam 2026 will be held on 28 February 2026 by the Central Board of Secondary Education. With limited time left, students must prepare smartly by focusing on high-weightage chapters instead of studying randomly. Understanding chapter-wise marks distribution helps in prioritizing important topics, improving revision efficiency, and maximizing scores in the final board exam.

30 Most Expected Questions for CBSE Class 12 Chemistry Exam 2026

The Importance of Chapter Weightage

Studying for chemistry board exams without understanding the mark distribution of each chapter is a critical mistake. It's like having access to a swimming pool but choosing to bathe with a small mug; you have a vast resource (the entire syllabus) but use an inefficient method (random study), leading to suboptimal results. For high marks, a strategic approach based on chapter weightage is essential. This method ensures you utilize your study time efficiently by focusing on topics that contribute significantly to your overall score.

Chemistry Class 12 CBSE Chapter Wise Weightage

Chapter-wise marks distribution gives a clear picture of which topics are most important for scoring well. High-weightage chapters like Electrochemistry and Aldehydes, Ketones, and Carboxylic Acids should be completed first because they contribute more marks. Medium-weight chapters such as Solutions, Chemical Kinetics, and Biomolecules also play an important role in overall scoring. By following the marks distribution, students can create an effective revision schedule and avoid last-minute confusion.

Chemistry Class 12 CBSE Chapter-wise Weightage

Unit/Chapter

Marks

Solutions

7

Electrochemistry

9

Chemical Kinetics

7

d- and f-Block Elements

7

Coordination Compounds

7

Haloalkanes and Haloarenes

6

Alcohols, Phenols and Ethers

6

Aldehydes, Ketones and Carboxylic Acids

8

Amines

6

Biomolecules

7

Total

70

CBSE Class 12 Chemistry Practical Weightage 2026

Practical marks play a crucial role in the final board result. Students should revise titration procedures, salt analysis steps, observation tables, and viva questions carefully. A strong understanding of experiments improves confidence during practical exams and helps secure full marks. Maintaining a complete practical file and preparing for viva questions can significantly improve the overall chemistry score.

CBSE Class 12 Chemistry Practical Weightage 2026

Evaluation Scheme

Marks

Volumetric Analysis

8

Salt Analysis

8

Content Based Experiment

6

Project Work

4

Class Record and Viva

4

Total

30


Recommended Study Sequence for Maximizing Scores

To optimize your preparation time and maximize your score in the board examinations, follow this recommended study sequence:

  1. Start with High-Weightage Chapters: Begin your preparation with chapters that carry the most marks. Prioritize Electrochemistry (9 marks) and Aldehydes, Ketones, and Carboxylic Acids (8 marks). Completing these first secures a significant portion of your total score early on.

  2. Next, Focus on Low-Length, High-Yield Chapters: After mastering the highest-weightage topics, shift your attention to chapters that are less lengthy but still offer substantial marks. Amines and Biomolecules are prime examples, collectively contributing 13 marks and requiring less time to cover.

  3. Finish with Lengthy Chapters: The final set of chapters to cover should be those that are extensive, even if their individual weightage is moderate. This group includes Inorganic Chemistry, specifically d- and f-Block Elements and Coordination Compounds. By following this strategic order, you significantly increase your likelihood of achieving a high score.

CBSE Class 12 Chemistry Practical Weightage 2026

Practical marks play a crucial role in the final board result. Students should revise titration procedures, salt analysis steps, observation tables, and viva questions carefully. A strong understanding of experiments improves confidence during practical exams and helps secure full marks. Maintaining a complete practical file and preparing for viva questions can significantly improve the overall chemistry score.

CBSE Class 12 Chemistry Practical Weightage 2026

Evaluation Scheme

Marks

Volumetric Analysis

8

Salt Analysis

8

Content Based Experiment

6

Project Work

4

Class Record and Viva

4

Total

30

 

Recommended Study Sequence for Maximizing Scores

To optimize your preparation time and maximize your score in the board examinations, follow this recommended study sequence:

  1. Start with High-Weightage Chapters: Begin your preparation with chapters that carry the most marks. Prioritize Electrochemistry (9 marks) and Aldehydes, Ketones, and Carboxylic Acids (8 marks). Completing these first secures a significant portion of your total score early on.

  2. Next, Focus on Low-Length, High-Yield Chapters: After mastering the highest-weightage topics, shift your attention to chapters that are less lengthy but still offer substantial marks. Amines and Biomolecules are prime examples, collectively contributing 13 marks and requiring less time to cover.

Finish with Lengthy Chapters: The final set of chapters to cover should be those that are extensive, even if their individual weightage is moderate. This group includes Inorganic Chemistry, specifically d- and f-Block Elements and Coordination Compounds. By following this strategic order, you significantly increase your likelihood of achieving a high score.

CBSE Chemistry High Weightage Chapters for Board Exam Revision FAQs

Q1: Why is understanding chapter weightage important for CBSE Chemistry board exams?

A1: Understanding chapter weightage is crucial for a strategic study approach. It helps students prioritize high-scoring chapters, optimize study time, and ensure efficient preparation to maximize their overall marks.

Q2: Which chapters are considered high-weightage in CBSE Chemistry?

A2: Electrochemistry (9 marks) and Aldehydes, Ketones, and Carboxylic Acids (8 marks) are identified as key high-weightage chapters.

Q3: Which chemistry chapters offer substantial marks but are less lengthy?

A3: Amines (6 marks) and Biomolecules (7 marks) together account for 13 marks and are considered low-length, high-yield chapters, making them efficient for scoring.

Q4: What is the recommended study order for CBSE Chemistry board exams?

A4: The recommended sequence is: first, high-weightage chapters (e.g., Electrochemistry); second, low-length, high-yield chapters (e.g., Amines and Biomolecules); and finally, lengthy chapters with moderate weightage (e.g., Inorganic Chemistry topics).
Free Learning Resources
Know about Physics Wallah
Physics Wallah is an Indian edtech platform that provides accessible & comprehensive learning experiences to students from Class 6th to postgraduate level. We also provide extensive NCERT solutions, sample paper, NEET, JEE Mains, BITSAT previous year papers & more such resources to students. Physics Wallah also caters to over 3.5 million registered students and over 78 lakh+ Youtube subscribers with 4.8 rating on its app.
We Stand Out because
We provide students with intensive courses with India’s qualified & experienced faculties & mentors. PW strives to make the learning experience comprehensive and accessible for students of all sections of society. We believe in empowering every single student who couldn't dream of a good career in engineering and medical field earlier.
Our Key Focus Areas
Physics Wallah's main focus is to make the learning experience as economical as possible for all students. With our affordable courses like Lakshya, Udaan and Arjuna and many others, we have been able to provide a platform for lakhs of aspirants. From providing Chemistry, Maths, Physics formula to giving e-books of eminent authors like RD Sharma, RS Aggarwal and Lakhmir Singh, PW focuses on every single student's need for preparation.
What Makes Us Different
Physics Wallah strives to develop a comprehensive pedagogical structure for students, where they get a state-of-the-art learning experience with study material and resources. Apart from catering students preparing for JEE Mains and NEET, PW also provides study material for each state board like Uttar Pradesh, Bihar, and others

Copyright Β© 2026 Physicswallah Limited All rights reserved.