Important Chapters for Bihar Board Class 12th Exams - Subjects-wise Chapters List
Bihar School Examination Board 12th 2026 ( BSEB 12th )
Exam On - 2 Feb '26 - 13 Feb '26
Bihar Board Class 12 exams 2026 will be conducted between February 2 and February 13, 2026. Students preparing for the Bihar Board Inter exams can check the Important Chapters for Bihar Board 12th Exams - Subjects-wise Chapters List and high weightage topics on this page.
Important Chapters for Bihar Board Class 12th Exams - Subjects-wise Chapters List
Important Chapters for Bihar Board Class 12th Exams - Chapters List for Maths, Physics, Chemistry, Biology, Arts and Commerce Papers: The Bihar Board Class 12 exams are a big stage for the students preparing for further studies and competitive exams. With the right strategy and focus on Important Chapters for Bihar Board Class 12th Exams (Science, Arts and Commerce Stream), the students can obtain desired marks in the final BSEB class 12th board exams. The Bihar School Examination Board (BSEB) follows a clear BSEB Class 12th exam pattern that includes objective (MCQs) and subjective questions in all subjects, including Mathematics, Physics, Chemistry, Biology, History, Sociology, Business Studies.
Most theory papers are conducted for 70 marks, with practicals carrying 30 marks, while other subject theory exams are conducted for 100 marks. In this article, we highlight important and scoring chapters of Bihar Board Inter Maths, Biology, Physics, Chemistry, and core Arts & Commerce subjects based on the latest Bihar Board class 12 syllabus and BSEB Inter exam pattern.
The Bihar School Examination Board has already announced the Bihar Board Inter exam date 2026. The Bihar Board exams 2026 class 12 will be conducted from February 2 to February 13, 2026.
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- Important Chapters for Bihar Board Class 12th Exams - Chapters List & Weightage for Mathematics
- Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Physics
- Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Chemistry
- Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Biology
- Important Chapters & Topics for Bihar Board Class 12th Exams- Exam Pattern for BSEB Class 12th Arts Subjects
- Important Chapters & Topics for Bihar Board Class 12th Exams- Exam Pattern for BSEB Class Inter Commerce Subjects
- Most Scoring Chapters and Topics in Bihar Board Class 12th Maths Subject
- Most Scoring Chapters and Topics in BSEB Class 12th Science Subjects
- Most Scoring Chapters and Topics in Bihar Board 12th Commerce Subjects
- Most Important & Scoring Chapters in Bihar Board Class 12th Arts Subjects
Important Chapters for Bihar Board Class 12th Exams - Chapters List & Weightage for Mathematics
Students can check the BSEB Class 12th chapters/units for Maths in the table below:
| Unit |
Marking scheme |
|---|---|
| Relations and Functions |
10 |
| Algebra |
13 |
| Calculus |
40 |
| Vectors and 3 Dimensional Geometry |
18 |
| Linear Programming |
9 |
| Probability |
10 |
Also Read: Bihar Board 12th Model Papers 2026 (Available): Download BSEB Class 12 Sample Papers
Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Physics
We have also provided the unit-wise marking scheme for Bihar Board class 12th Physics subject in the table below:
| Units |
Marking Scheme |
|---|---|
| Electrostatics |
08 |
| Current Electricity |
07 |
| Magnetic effect of Current and Magnetism |
08 |
| Electromagnetic Induction and Alternating Current |
08 |
| Optics |
04 |
| Dual Nature of Matter |
04 |
| Atoms and Nuclei |
06 |
| Electronic Devices |
07 |
| Communication Systems |
07 |
| Electromotive Waves |
03 |
Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Chemistry
The students can check the unit-wise marking scheme for Bihar Board Inter Chemistry paper in the table below:
| Units |
Marking Scheme |
|---|---|
| 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 |
Important Chapters for Bihar Board Inter Exams - Chapters List & Weightage for Biology
Space below table mentions the unit-wise marking scheme for BSEB class 12 Biology paper:
| Unit |
Marking Scheme |
|---|---|
| Sexual Reproduction |
06 |
| Unit 2: Genetics and evolution |
18 |
| Biology & human welfare |
18 |
| Biotechnology and its applications |
18 |
| Ecology and environment |
10 |
Important Chapters for Bihar Board Class 10th Exams - Subjects-wise Chapters List
Important Chapters & Topics for Bihar Board Class 12th Exams- Exam Pattern for BSEB Class 12th Arts Subjects
In the table below, the students can check the exam pattern for Arts papers:
| Subjects |
Full Marks |
Theory |
|---|---|---|
| History |
100 |
100 |
| Political Science |
100 |
100 |
| Psychology |
100 |
70 |
| Geography |
100 |
70 |
Also Read: Important Chapters for Bihar Board Class 10th Exams - Subjects-wise Chapters List
Important Chapters & Topics for Bihar Board Class 12th Exams- Exam Pattern for BSEB Class Inter Commerce Subjects
We have also provided the exam pattern for the BSEB class 12 commerce subjects in the table below:
| Subjects |
Full Marks |
Theory |
|---|---|---|
| Accountancy |
100 |
100 |
| Business Studies |
100 |
100 |
| Economics |
100 |
100 |
| Entrepreneurship |
100 |
70 |
Most Scoring Chapters and Topics in Bihar Board Class 12th Maths Subject
Mathematics is the most important and one of the toughest subject in BSEB Inter exams. These are the most important and scoring chapters in Bihar Board class 12th Maths subjects:
| Unit |
Important Chapters / Topics |
|---|---|
| Relations & Functions |
Relations, Types of Functions, Inverse Functions |
| Algebra |
Matrices, Determinants |
| Calculus |
Continuity & Differentiability, Applications of Derivatives, Integrals, Differential Equations |
| Vectors |
Vector Algebra, Scalar & Vector Products |
| Three-Dimensional Geometry |
Direction Cosines, Direction Ratios, Equation of Line & Plane |
| Linear Programming |
Graphical Method, Feasible Region, Optimal Solution |
| Probability |
Conditional Probability, Bayes’ Theorem |
| Statistics |
Mean, Variance, Standard Deviation |
Most Scoring Chapters and Topics in BSEB Class 12th Science Subjects
The students can find the most important chapters/topics of Bihar Board class 12 Science papers in the table below:
| Subject |
Important Chapters / Units |
|---|---|
| Physics |
Electrostatics & Current Electricity; Magnetism & Electromagnetic Induction; Optics; Atoms & Nuclei; Electronic Devices |
| Chemistry |
Electrochemistry; Chemical Kinetics; Organic Chemistry (Alcohols, Phenols, Aldehydes); Coordination Compounds; Biomolecules |
| Biology |
Reproduction; Genetics & Evolution; Biology & Human Welfare; Biotechnology & Its Applications; Ecology & Environment |
| Mathematics |
Relations & Functions; Calculus (Derivatives & Integrals); Vectors & 3D Geometry; Probability; Statistics |
Most Scoring Chapters and Topics in Bihar Board 12th Commerce Subjects
The students can check the most scoring chapters/topics of Bihar Board Inter Commerce topics in the table below:
| Subject |
Important Chapters / Units |
|---|---|
| Accountancy |
Partnership Accounts (Admission, Retirement, Dissolution); Company Accounts (Share Capital, Debentures); Financial Statements; Ratio Analysis; Cash Flow Statement |
| Business Studies |
Principles of Management; Business Environment; Marketing Management; Financial Management |
| Economics |
Consumer Behaviour & Production; Market Structures; National Income & Money Banking; Government Budget; Open Economy |
| Mathematics / Entrepreneurship |
Calculus Basics; Probability; Business Mathematics; Small Business & Entrepreneurship |
Most Important & Scoring Chapters in Bihar Board Class 12th Arts Subjects
We have mentioned the most scoring chapters/units of Bihar Board Class 12 Arts topics in the table below:
| Subject |
Important Chapters / Units |
|---|---|
| History |
Ancient Civilisations; Medieval India; Modern Indian History; Cultural & Social History |
| Geography |
Human Geography; Resources & Development; Transport & Communication; Map Work |
| Political Science |
Cold War & Post-Cold War Era; International Organisations; Contemporary South Asia; Globalisation |
| Psychology |
Developmental Psychology; Human Behaviour; Learning & Intelligence |
| Sociology |
Social Institutions; Culture & Society; Social Change |
| Languages (English/Hindi) |
Reading Comprehension; Writing Skills; Grammar; Prose & Poetry |
The students are advised to cover all the Important Chapters for the Bihar Board Class 12th Subjects as mentioned above. Apart from this, they should also practice the BSEB Intermediate model papers 2026 and previous years' Bihar Board Class 12th Exam Question Papers.
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