Assam Board Class 12 Science Chapter Weightage 2026-27
Complete Marks Distribution for SEBA Class 12 Science Board Exams
Understand the chapter-wise weightage and marks distribution to prioritize your board exam preparation for Assam Board Class 12 Science 2026-27.
Assam Board Class 12 Science Board Exam Overview 2026-27
Total Marks
100
per subject
Theory Marks
70-80
per subject
Practical/Internal
20-30
per subject
Physics Chapter Weightage (Board Exam)
| Chapter/Topic | Weightage (Marks) | Priority Level |
|---|---|---|
| Optics - Ray and Wave Optics | 12 | Very High |
| Modern Physics - Atoms and Nuclei | 10 | High |
| Electrostatics | 10 | High |
| Electromagnetic Induction | 8 | High |
| Current Electricity | 8 | High |
| Magnetic Effects of Current | 8 | High |
| Electromagnetic Waves | 6 | Medium |
| Electronics | 8 | High |
| Practical + Internal | 20 | Very High |
Chemistry Chapter Weightage (Board Exam)
| Chapter/Topic | Weightage (Marks) | Priority Level |
|---|---|---|
| Organic Chemistry - Basic Principles | 12 | Very High |
| Hydrocarbons | 10 | High |
| Haloalkanes and Haloarenes | 8 | High |
| d-Block and f-Block Elements | 8 | High |
| Solutions and Electrochemistry | 8 | High |
| Chemical Kinetics | 8 | High |
| p-Block Elements | 8 | High |
| Surface Chemistry | 6 | Medium |
| Practical + Internal | 20 | Very High |
Biology Chapter Weightage (Board Exam - PCB Option)
| Chapter/Topic | Weightage (Marks) | Priority Level |
|---|---|---|
| Genetics and Evolution | 14 | Very High |
| Biotechnology and its Applications | 12 | Very High |
| Ecology and Environment | 12 | Very High |
| Human Health and Disease | 10 | High |
| Reproduction | 12 | Very High |
| Plant Physiology | 10 | High |
| Practical + Internal | 20 | Very High |
Mathematics Chapter Weightage (Board Exam - PCM Option)
| Chapter/Topic | Weightage (Marks) | Priority Level |
|---|---|---|
| Calculus - Continuity, Differentiability, Integration | 18 | Very High |
| Algebra - Matrices and Determinants | 12 | Very High |
| Vectors and 3D Geometry | 12 | Very High |
| Relations and Functions | 10 | High |
| Probability and Statistics | 10 | High |
| Linear Programming | 8 | Medium |
| Internal Assessment | 20 | Very High |
Board Exam Strategy Based on Weightage
Priority 1: Very High (20%+ weightage)
Focus on these chapters first. They carry maximum weightage and can significantly impact your final board exam score.
Priority 2: High (15-19% weightage)
These chapters are important and should be studied after completing high-priority chapters.
Priority 3: Medium (10-14% weightage)
Study these chapters after covering high-priority topics to maximize your overall score.
Science Board Exam Strategy
Step 1: Master all Very High priority chapters (20%+ weightage)
Step 2: Thoroughly cover High priority chapters (15-19% weightage)
Step 3: Complete Medium priority chapters (10-14% weightage)
Step 4: Practice previous years' board papers and take mock tests
Step 5: Revise regularly and focus on time management
Step 6: Focus on practical experiments and record book
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