Chemistry Class 12 Marks Distribution with Weightage 2026
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.
- 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
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 |
Commonly asked questions
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.
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.
CBSE is expected to release the CBSE exam Class 12 2026 date sheet for Compartment exams was announced.
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 |
| 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 |
Commonly asked questions
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.
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.
| Year | No. of Appeared Candidates |
|---|---|
| 2025 | 16.92 lakh |
| 2024 | 16.60 lakh |
| 2023 | 16.90 lakh |
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.
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
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 |
Commonly asked questions
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.
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.
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.
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
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