Chemistry Class 12 Marks Distribution with Weightage 2026

Chemistry Class 12 Marks Distribution with Weightage 2026

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Sanjana Surbhi
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Updated on Jul 27, 2026 12:49 IST
Chemistry Class 12th Marks Distribution: Students can check exam format, marking scheme and topic-wise weightage for Class 12 Chemistry for CBSE, ISC, Bihar, Maharashtra HSC & UP Boards to help them prepare better. To help students prepare for Class 12th board exams, we have provided Weightage of Chemistry Class 12 Chapter Wise 2026 CBSE and ISC

Chemistry Class 12 Marks Distribution: CBSE, ISC, Bihar, Maharashtra HSC, UP and CGBSE board students can check topic-wise weightage for Class 12 Chemistry. This will help them understand exam format, pattern and marking schemes in board exam preparation. 

                                                                                                         Chemistry Marks Distribution

Chemistry Class 12 Marks Distribution: Students preparing for board exam should understand Chemistry Class 12 marks distribution and weightage to know how marks are divided in different units and chapters. Class 12 Chemistry chapter-wise weightage helps students in knowing important topics and check high scoring units.

It must be noted that Chemistry Class 12 exam pattern includes theory paper, practical exam and internal assessment. Knowing Chemistry weightage for Class 12 board exams helps in better revision planning. For upcoming board exams, students can check detailed Chemistry Class 12 chapter-wise weightage for CBSE, ISC, Maharashtra, UP, CGBSE and other boards on this page.

As per passing criteria, students appearing for CBSE Class 12 board exams must score at least 33% marks in each subject to pass. If a student obtains overall pass percentage but fails in one subject, they will have to appear for Class 12 supplementary exam. In Maharashtra HSC Chemistry 12, students have to obtain 35 percent marks.

Table of contents
  • CBSE Class 12 Chemistry Weightage
  • ISC Class 12 Chemistry Weightage 2026
  • Bihar Board 12th Chemistry Weightage 2026
  • Maharashtra HSC Chapter-wise weightage for Chemistry 2026
  • UP Board 12 Chemistry Weightage
  • MP Board 12 Chemistry Marks Distribution & Weightage
  • CGBSE 12th Marks Distribution and Weightage
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CBSE Class 12 Chemistry Weightage 

Students can check unit wise distribution of marks for CBSE Class 12 Chemistry exam

Unit 

Marks 

Solutions 

Electrochemistry 

Chemical Kinetics 

d -and f -Block Elements 

Coordination Compounds 

Haloalkanes and Haloarenes 

Alcohols, Phenols and Ethers 

Aldehydes, Ketones and Carboxylic Acids 

Amines 

Biomolecules 

Total 

70 

Q&A Icon
Commonly asked questions
Q:   When Maharashtra HSC date sheet 2027 will be released?
A: 

Maharashtra HSC datesheet 2027 will be released in October. The date sheet will be made available in PDF form. It carries the subject-wise exam dates.

Q:   What are Maharashtra HSC exam timings?
A: 

Maharashtra HSC exams are held in two shifts. The Morning Shift is conducted from 11 am to 2.10 pm. The evening shift is held from 3 pm to 6 .10 pm. Students need to reach the exam centre on time.

Q:   Where can I find the Maharashtra HSC dates?
A: 

Maharashtra HSC dates are announced online by the Maharashtra State Board of Secondary and Higher Secondary Education. The direct link to download is made available on this page. The date sheet PDF comprises the important date related to the exam.

Q:   What happens if you take leave in CBSE 12th board exam?
A: 

In case you're unable to attend a CBSE 12th board exam, you will be given zero marks in the subject. Soon, you will be asked to appear for the supplementary exam. Thus, it is better to focus and study hard and not skip or leave your exam to pass with flying colours.

ISC Class 12 Chemistry Weightage 2026

The weightage of each chapter helps students score well in the Chemistry Class 12 ISC Board exam. Check the unit wise distribution of marks for ISC Class 12 Chemistry exam.  

Unit 

Marks Distribution 

Solutions 

Physical Chemistry 
25 Marks 

Electrochemistry 

Chemical Kinetics 

d-and-f-Block Elements 

Inorganic Chemistry 
14 Marks 

Coordination Compounds 

Haloalkanes and Haloarenes 

Organic Chemistry 
31 Marks 

Alcohols, Phenols and Ethers 

Aldehydes, Ketones and Carboxylic acids

Organic Compounds Containing Nitrogen 

 Biomolecules 

Total Marks 

70 

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Bihar Board 12th Chemistry Weightage 2026

Below is unit wise distribution of marks for Bihar Board (BSEB) chemistry exam.  

Unit

Weightage 

Solid State 

04 

Solutions 

05 

Electrochemistry 

05 

Chemical Kinetics 

05 

Surface Chemistry 

04 

General Principles and Processes of Isolation of Elements 

03 

p-block Elements 

08 

d and f-block elements 

05

Coordination Compounds 

03 

Haloalkanes and Haloarenes 

04 

Alcohols, Phenols, and Ethers 

04 

Aldehydes, Ketones, and Carboxylic Acids 

06 

Organic Compounds and containing Nitrogen 

04 

Biomolecules 

04 

Polymers 

03 

Chemistry in Everyday Life 

03 

Total 

70 

Q&A Icon
Commonly asked questions
Q:   What if I get late in reaching the Maharashtra HSC exam centre?
A: 

Students are advised to reach the Maharashtra HSC exam centre at least half an hour before the commencement of exams. The exam timings are mentioned in the maha HSC hall ticket. In case a student gets late in reaching the exam centre, he/she must understand that they will not be given any extra time to write the exam. 

Thus, it is advised that students leave for the exam centre early considering the traffic or any other deterrent. 

Q:   Is it important to study in morning on exam day?
A: 

Yes, It is important to study in the morning on examination day as it helps a student to stay focused hence more productive. After a good night sleep, our brains tend to be more efficient and alert. It makes learning more easy. The morning time is best for last revision before appearing in exam.

Q:   Can I go to washroom during Maharashtra HSC board exam?
A: 

When appearing for the Maharashtra 12th board exams, you must feel relaxed and comfortable. Yes, you will be allowed to go to the washroom during the examination but only once and with an invigilator. Students often use washroom for using unfair means and cheat in board exams, however, they must know that the invigilator can frisk them anytime during the exam duration. So, it is recommended to use washroom only when needed.

Q:   How many students appear for the BSEB Inter exams every year?
A: 

Every year, more than 13 Lacs students appear for the BSEB 12th exams. As per the data shared by the Bihar Board, in 2024, a total of 13,04,352 students registered for the BSEB class 12 exam. Last year, a total of 13.18 Lacs students appeared for the BSEB class 12 exam. Out of which, 10.91 Lacs candidates cleared the exam. While Lacs of students were unable to pass the exam. The overall pass percentage stood at 83.7 %. This year too, more than 13 Lacs students are expected to participate in the class 12 board exams. After the declaration of result, BSEB will share the stats related to the BSEB 12th the exam and result.

Maharashtra HSC Chapter-wise weightage for Chemistry 2026

Check the unit-wise distribution of marks for the Maharashtra HSC chemistry exam.  

Unit

Marks  without option 

Marks  with option 

Solid State 

04 

06 

Solutions and Colligative Properties 

05

07 

Chemical Thermodynamics and Energetic 

06 

08 

Electrochemistry 

05 

07 

Chemical Kinetics 

04 

06 

General Principles and Processes of Isolation of Elements 

03 

05 

p-Block Elements 

08 

10 

d and f – Block Elements 

05 

06 

Coordination Compounds 

03 

04 

Halogen Derivatives of Alkanes and Arenes 

04 

06 

Alcohols, Phenols, and Ethers 

04 

06 

Aldehydes, Ketones and Carboxylic Acids 

05  

07 

Compounds Containing Nitrogen 

 

04 

06 

Biomolecules 

04 

06 

Polymers 

03 

04 

Chemistry in Everyday Life 

03 

04 

UP Board 12 Chemistry Weightage 

Students can check chapter-wise weightage for Class 12th Chemistry, as per UP Board exam pattern 

UP Board Chemistry Unit-wise Marking Scheme

UP Board Chemistry Unit-wise Marking Scheme

As per exam pattern of UP Board class 12th, practical exam is held for 30 marks and theory paper is conducted for 70 marks. The theory exam is divided into two papers and Chemistry marks distribution is same for both papers.

Papers

Units

Marks Distribution

Paper 1

General and Inorganic Chemistry

35 marks

Paper 2

Physical and Organic Chemistry

35 marks

Q&A Icon
Commonly asked questions
Q:   How many students appear for CBSE 12th exam every year?
A: 

Approximateky 16 to 17 lakh  students appear for CBSE Class 12 board exams every year. The year-wise data of number of appeared candidates is given below.

YearNo. of Appeared Candidates
202516.92 lakh
202416.60 lakh
202316.90 lakh

 

Q:   When will the Bihar Board class 12 model paper 2026 be released?
A: 

Bihar Board is expected to publish the BSEB Inter sample question paper 2026 in November/December 2025. The board releases the BSEB 12th model papers 2025-26 for all paper online on its website. As soon as it gets released, the students can download the same from the official website at biharboardonline.com. BSEB 12th model sample paper includes the type of questions asked in the exam. By practicing the Board class 12 model/sample question paper 2026, students will be able to understand the overall exam pattern.

MP Board 12 Chemistry Marks Distribution & Weightage 

MPBSE 12th board exam have theory and a practical or project-based section. MP Board 12 Chemistry theory exam is of 80 marks and project work is conducted for 20 marks. For subjects with practical section, the theory paper is of 70 marks and practical exams are held for 30 marks. Students can check table below to know Madhya Pradesh class 12th marks distribution here 

Type of Questions

Number of Questions

Marks Per Questions

Objective Questions

30 Questions

1 Mark

Subjective Questions

3/5

3 Marks

Analytical Questions

6/6

4 Marks

CGBSE 12th Marks Distribution and Weightage

CG board class 12th exam is held for a total of 100 marks. It must be noted that theory paper without practical is of 80 marks and internal assessment is held for 20 marks. Also, CGBSE 12th theory marks for practical subjects are 70. Check marks distribution and weigtage below

Chemistry Class 12 Marks Distribution with Weightage

Chemistry Class 12 Marks Distribution with Weightage

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Sanjana Surbhi
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Sanjana Surbhi is education focused content specialist with over five years of experience in education sector. She covers engineering and government exams. She holds Bachelor’s degree in Mass Communication from Patn

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