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

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

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:   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:   When CBSE 12th date sheet 2027 will be released?
A: 

CBSE 12th date sheet 2027 will be released soon. The board first releases the tentative date sheet in September. Following which, the final date sheet is released in October.

Q:   Does CBSE release the CBSE 12th date sheet for all three stream separately?
A: 

No, CBSE released the CBSE Class 12 date sheet for all subjects together. However, to make the exam dates simpler to find and use, Shiksha.com divides and shares the CBSE 12th date sheet according to three streams - Science, Commerce and Arts.

Students can click on CBSE 12th Date Sheet to check stream-wise date sheet for CBSE 12th board exams. 

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 the Bihar Board 12th exams 2027 be held?
A: 

BSEB will announce the Bihar Board 12th time table 2027 in November this year. BSEB Class 12 exams 2027 is expected to be conducted in February 2027. The board conducts the BSEB Inter exam 2027 in offline mode in two shifts.

Q:   When will BSEB 12th exam dates 2027 be announced?
A: 

Bihar School Examination Board will soon come up with the BSEB class 12 timetable 2027. The board releases the Bihar Board Inter Time Table 2027 online on its official website at biharboardonline.com and biharboardonline.bihar.gov.in. Class 12 time table 2027 Bihar Board mentions the subject-wise exam date, exam commencement and ending time, reporting time, and more.

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:   Will the state board conduct BSEB Inter supplementary exams?
A: 

Yes, every year, the state board will conduct the BSEB 12th supplementary exams for the students who fail in the BSEB Inter exams. After the declaration of board results, BSEB will come up with the date to conduct the class 12 compartment exam. As soon as the dates are announced, students can check the same on the official website of the board and on this page as well. The board will release applications for the BSEB 12th compartment exams. However, it is expected that the BSEB 12th compartment and improvement exam will be held in Apr/May 2025.

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 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 are the total marks of BSEB 12th exams?
A: 

The total marks in the BSEB Class 12 exam are 500. Bihar Board 12th exams are held for a total of five subjects. Hence, the result is prepared for the 500 marks only. Each paper of the exam consists of 100 marks. On the other hand, in some papers, theory exams are held for a total of 70 marks while practical exams are held for a total of 30 marks. These subjects include Physics, Chemistry, Biology, Geography, Home Science, Psychology, etc.

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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