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Weightage and Marking Scheme: CBSE class 12 Chemistry Marking scheme

Author : Palak Khanna

Updated On : September 6, 2023


Summary: Understanding the CBSE class 12 Chemistry Marking scheme can significantly increase your chances of scoring high. This article provides a detailed breakdown of the marking scheme so you know where to put your efforts.

Scoring high in the CBSE Class 12 Chemistry exam requires more than just understanding the subject matter; it requires a strategic approach based on the marking scheme. 

Knowing how marks are distributed among different sections will help you allocate your time and efforts more efficiently. 

In this article, we delve into the specifics of the CBSE Class 12 Chemistry marking scheme of each unit in the Chemistry syllabus. 

CBSE class 12 Chemistry Marking scheme: Question Paper Pattern

For those aiming to ace the CBSE Class 12 Chemistry exam, knowing the marking scheme is your roadmap to success.

Use it wisely, and happy studying!

The Question Paper Pattern for Chemistry is as follows - 

  • MCQ - 20% 
  • Case and Source-Based Questions - 30%
  • Short and Long Answer Questions - 50%

Check: CBSE 2023 Toppers Talk

CBSE class 12 Chemistry Marking scheme: Syllabus Marks Distribution

The table below has the marking scheme for all the CBSE Chemistry topics that can appear in the exam.

S.No Title No. of Periods Marking Scheme of CBSE Chemistry Class 12
1 Solutions 10 7
2 Electrochemistry 12 9
3 Chemical Kinetics 10 7
4 d -and f -Block Elements 12 7
5 Coordination Compounds 12 7
6 Haloalkanes and Haloarenes 10 6
7 Alcohols, Phenols and Ethers 10 6
8 Aldehydes, Ketones and Carboxylic Acids 10 8
9 Amines 10 6
10 Biomolecules 12 7

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Total Chemistry marks will be 70 marks + 30 marks. 

30 being practicals and 70 being theory.

Check: How to get 90+ Marks in Economics Class 12 CBSE Board?

CBSE class 12 Chemistry Marking Scheme for every Unit

marking scheme of CBSE class 12 chemistry chapter wise is as follows -



CBSE class 12 chemistry chapter wise marking Scheme

Unit I

Solid State


Unit II


Unit III


Unit IV

Chemical Kinetics

Unit V

Surface Chemistry

Unit VII

p -Block Elements



d -and f -Block Elements

Unit IX

Coordination Compounds

Unit X

Haloalkanes and Haloarenes


Unit XI

Alcohols, Phenols and Ethers

Unit XII

Aldehydes, Ketones and Carboxylic Acids



Unit XIV


Check out the practice questions and marking scheme by clicking this PDF File.

Does the CBSE class 12 Chemistry Marking scheme have negative markings?

Note that CBSE class 12 Chemistry does not have negative markings. 

Check: CBSE Class 12 Applied Mathematics

CBSE class 12 Chemistry Marking Scheme for Practicals

The practicals are conducted for 30 marks. Check the evaluation process in the table below for CBSE class 12 chemistry practical exam marking scheme - 

Evaluation Scheme for Examination Marks
Volumetric Analysis 8
Salt Analysis 8
Content-Based Experiment 6
Project Work and Viva 4
Class record and Viva 4
Total 30

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How To Utilize The Marking Scheme

Understanding the grading scheme is one thing; properly employing it during your preparation process is at most important. Focus on:

  • Prioritising topics based on marks weightage
  • Balancing preparation time for each section
  • Practicing different types of questions

Check: CBSE class 12 Chemistry Reference books


Understanding the CBSE Class 12 Chemistry marking scheme can guide you in your Chemistry preparation, helping you focus on areas that yield the highest marks. Use this knowledge as a strategic tool to plan your studies and make the most of your preparation time.

Check: How to score 100 in Chemistry Class 12 CBSE

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Frequently Asked Questions

Is the marking scheme the same every year?

How important is it to solve the previous year's question papers?

Do I need to focus equally on all sections?

Are Practical-Based Questions common every year?

Can I score well without paying attention to the marking scheme?


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