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 Feb 20, 2026 10:42 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 and UP boards students can go through topic-wise weightage for Class 12 Chemistry. This will help them in understanding exam format, pattern and marking schemes in board exam preparation.

                                                                                                         Chemistry Class 12 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 and time management. For 2026 board exams, students can check detailed Chemistry Class 12 chapter-wise weightage 2026 for CBSE, ISC, Maharashtra, UP 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. However, in Maharashtra HSC Chemistry 12, students have to obtain 35 percent marks.

Also Read:

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

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 will the Board release CBSE compartment date sheet for Class 12 2026? When will the exams be held?
A: 

CBSE is expected to release the CBSE exam Class 12 2026 date sheet for Compartment exams in June 2026. The Class 12 supplementary exams 2026 will likely be held on July 15, 2026 for all subjects and the results for the same will be out in August first week, tentatively.

Pls note that the Board has renamed the compartment exams as the supplementary exams.

Q:   Will MSBSHSE conduct Maharashtra 12th supplementary exams for all subjects?
A: 

Yes, the Board conducts Maharashtra 12th supplementary exam for the subjects which students are not able to clear. The HSC exam will be held from June 16 to July 8. 

Students who were unable to clear their Maharashtra HSC exams in one or two subjects and those who wish to improve their marks can apply and appear for the supplementary/improvement exams.  

Q:   What will be the mode of the Bihar Board Matric exam 2026?
A: 

Bihar Board class 10 exams are held in offline mode. The students need to write the exam in pen and paper mode. To write the BSEB matric exam, all the examinees are given two types of answer sheets. The first type of answer copy is an OMR sheet which is for multiple-choice questions. On the other hand, the students are also given blank answer sheets to write non-MCQs. The students are suggested to follow all the instructions related to the exam.

Q:   How can I access the BSEB 12th time table 2026 PDF?
A: 

The Bihar School Examination Board is expected to release the BSEB Inter time table 2026 in November/December 2026. Students can access the BSEB 12th time table 2026 PDF online the official website at biharboardonline.bihar.gov.in. The board also releases the BSEB class 12 time table 2026 on its official twitter account. On the homepage of the official website, students can find a direct link to download the BSEB date sheet 2026 PDF.

Apart from the official website, students can download the same on this page. We also provide a direct link on this page to download the same.

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:   When will CBSE 12th Commerce exams 2026 be conducted?
A: 

 The CBSE commerce exams 2026 was held between February 21 and March 28, 2026. You can check the date sheet below:

Date

Subject

21-Feb-2026

Business studies, business administration

9-Mar-2026

Mathematics, applied mathematics

12-Mar-2026

English elective, English core

18-Mar-2026

Economics

25-Mar-2026

Informatics Practices, computer science, IT

28-Mar-2026

Accountancy

 

Q:   Will CBSE conduct 12th supplementary exams for all subjects?
A: 

Yes, the Board conducts CBSE 12th supplementary exam for the subjects which students are not able to clear. CBSE Class 12 supplementary exams are usually conducted on a single day.

Students who are unable to clear their CBSE Class 12 exams in one or two subjects and those who wish to improve their marks can apply and appear for the supplementary/improvement exams.  

Q:   When will CBSE 12th Physics exam 2026 be conducted?
A: 

CBSE conducted the CBSE Class 12 Physics exams 2026 on February 20, 2026. You can click on CBSE 12th date sheet to check the Class 12 exam dates for all subjects. 

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:   Can the BSEB Intermediate time table be changed?
A: 

Usually the board does not revise the Bihr Board 12th exam date. The board prepares the BSEB 12th time table 2026 after considering all the governement events and holidays etc. Hence, the chance of exam date revision is very less. For BSEB 12th exam 2026, the board is yet to announce the final time table. Students can access the same online on the official website. Moreover, we also provide a direct link on this page to download the BSEB class 12 time table 2026 pdf. BSEB 12th board exams 2026 is being held between February 2 and 13, 2026.

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:   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

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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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