Chemistry Class 12 Marks Distribution with Weightage 2026
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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:
- 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 |
7 |
| Electrochemistry |
9 |
| Chemical Kinetics |
7 |
| d -and f -Block Elements |
7 |
| 7 |
|
| Haloalkanes and Haloarenes |
6 |
| 6 |
|
| Aldehydes, Ketones and Carboxylic Acids |
8 |
| Amines |
6 |
| 7 |
|
| Total |
70 |
The board officials conduct HSC exam in two shifts : morning shift from 11am to 2.10 pm and evening shift from 3pm to 6.10pm. The timings for all streams : Science, Commerce, Arts and general remains the same. All the students appearing for their board examination should reach their respective centers well before time to avoid unnecessary chaos.
The Maharashtra 12th board exams 2026 is being held between February 10 and March 11, 2026. Maharashtra board released the Mah HSC time table 2026 on October 31, 2025.
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 |
| Electrochemistry |
|
| Chemical Kinetics |
|
| d-and-f-Block Elements |
Inorganic Chemistry |
| Coordination Compounds |
|
| Haloalkanes and Haloarenes |
Organic Chemistry |
| Alcohols, Phenols and Ethers |
|
| Aldehydes, Ketones and Carboxylic acids |
|
| Organic Compounds Containing Nitrogen |
|
| Biomolecules |
|
| Total Marks |
70 |
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 |
You will be allowed to wear a simple analogue watch, which shows time. Any other electronic device, head phones, smart watch or digital watch will not be allowed inside the examination hall. A student is well informed before his/ her exam that he/she should only carry their stationary items in a clear pouch with their roll number sheet provided by Maharashtra Board.
The CBSE 12th Science exams 2026 will be held between February 20 and March 27, 2026. The Board released the CBSE 12th date sheet 2026 in October 2025. Check the dates for CBSE Class 12 Science below:
Date | Subject |
|---|---|
20-Feb-2026 | Physics |
28-Feb-2026 | Chemistry |
9-Mar-2026 | Mathematics, Applied Mathematics |
12-Mar-2026 | English elective, English core |
17-Feb-2026 | Biotechnology |
27-Mar-2026 | Biology |
Students can click on CBSE 12th date sheet 2026 to check the detailed CBSE Class 12 date sheet.
The CBSE commerce exams 2026 will be 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 |
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
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 |
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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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.