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:   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:   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.

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 was announced.

Q:   What is Maharashtra Board HSC passing marks?
A: 

Maharashtra HSC passing marks are decided by board. It is 35 per cent in each subject. Those securing this are declared qualified in exam.

 

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:   When will CBSE 12th compartment exam 2026 be held?
A: 

CBSE 12th compartment exam 2026 will be held on July 28. Earlier, the exam was scheduled to be held on July 15. It will be a single-day exam. Students can appear in one subject.

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:   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:   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. 

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:   What are the important documents to carry on CBSE 12th exam days?
A: 

You must not forget to carry your CBSE 12th admit card on all exam days. In case you forget, you will not be allowed to write the exam. Along with the CBSE 12th admit card and school ID, students must also carry their pens, pencils, ruler. geometry box etc.

The board releases the CBSE 12th admit card in the first week of February on the official website. Students  need to collect their admit card from their school respectively.  The CBSE 12th exams are held from February until April every year.  

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.

Q:   Can I use a scientific calculator in the CBSE 12th board exams?
A: 

NO. No type of calculators, mobile phones, or any technological gadget is allowed during CBSE exams. Any student caught carrying these will be barred from writing their exam. 

Q:   When will CBSE conduct CBSE 12th exams 2026?
A: 

The Central Board of Secondary Education is expected to conduct the CBSE 12th exams 2026 between February and April in pen and paper format. Students need to collect the same from their school and carry it with them on all exam days. Students can click on CBSE Class 12 date sheet 2026 to stay updated for the release of the time table. 

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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