AHSEC Class 12 Compartment 2026 chapter-wise weightage shows that Calculus dominates Mathematics with 35 marks out of 80, Electrostatics and Optics together carry 29 marks in Physics, and p-Block Elements is the highest-scoring inorganic chapter in Chemistry with 8 marks.
Students appearing for the AHSEC Class 12 Compartment 2026 exam need a targeted revision strategy built around high-weightage chapters. The Assam Higher Secondary Education Council conducts the compartment examination for HS 2nd Year students who failed in not more than two subjects in the main board exam. Knowing which chapters carry the most marks in Mathematics, Physics and Chemistry helps you allocate study time wisely and clear the pass threshold confidently.
- Mathematics theory is out of 80 marks; Calculus alone accounts for 35 marks — nearly half the theory paper.
- Physics theory paper carries 70 marks; Electrostatics (15 marks) and Optics (14 marks) are the two highest-scoring units.
- Chemistry theory paper also carries 70 marks; p-Block Elements (8 marks) and Aldehydes, Ketones and Carboxylic Acids (6 marks) are the top chapters by marks.
- Practical marks from the main HS 2nd Year exam are carried forward — compartment students appear in the theory paper only.
- The compartment exam follows the same syllabus and question paper pattern as the main HS 2nd Year examination.
| Direct Link to AHSEC HS 2nd Year Compartment 2026 Official Portal (Visit) |
About AHSEC Class 12 Compartment Exam 2026
The Assam Higher Secondary Education Council (AHSEC) offers a compartment examination to HS 2nd Year students who failed in one or two subjects in the annual board exam. The compartment exam gives you a second attempt to pass and complete your Class 12 without losing an academic year. The 2026 compartment exam is conducted after the declaration of the main HS 2nd Year result, and all official notifications are published on the AHSEC portal at ahsec.assam.gov.in.
| Detail | Information |
|---|---|
| Conducting Body | Assam Higher Secondary Education Council (AHSEC) |
| Exam Name | HS 2nd Year Compartment Examination 2026 |
| Eligibility | Students who failed in 1 or 2 subjects in HS 2nd Year 2026 |
| Subjects Covered | All HS 2nd Year subjects including Mathematics, Physics, Chemistry |
| Practical Marks | Carried forward from the main examination |
| Syllabus | Same as the main HS 2nd Year examination |
| Official Website | ahsec.assam.gov.in |
Chapter-Wise Weightage for Mathematics
The AHSEC Class 12 Mathematics paper carries 100 marks in total — 80 marks for theory and 20 marks for internal assessment. Compartment students appear only in the 80-mark theory paper since internal assessment marks are carried forward. Calculus is the most critical unit, contributing nearly half of the theory paper marks on its own.
| Unit | Key Chapters | Approx. Marks (Theory, out of 80) |
|---|---|---|
| Relations and Functions | Relations, Functions, Inverse Trigonometric Functions | 8 |
| Algebra | Matrices, Determinants | 10 |
| Calculus | Continuity and Differentiability, Applications of Derivatives, Integrals, Applications of Integrals, Differential Equations | 35 |
| Vectors and 3D Geometry | Vectors, Three-Dimensional Geometry | 14 |
| Linear Programming | Linear Programming Problems | 5 |
| Probability | Conditional Probability, Bayes’ Theorem, Random Variables, Probability Distributions | 8 |
| Total | 80 |
Top-scoring chapters in Mathematics: Integration and Applications of Integrals together can fetch 15 or more marks — practise area under curves and definite integration thoroughly. Determinants and Matrices is a reliable unit; cover row operations, adjoint and inverse of matrices, and solving systems of equations. Vectors and 3D Geometry (14 marks) rewards students who practise direction cosines, plane equations and shortest distance between lines. Probability is formula-driven and highly predictable — Bayes’ Theorem and the binomial distribution appear almost every year.
Chapter-Wise Weightage for Physics
The AHSEC Class 12 Physics theory paper is out of 70 marks. Practical marks (30 marks) from the main exam are carried forward for compartment students. Electrostatics and Optics together account for 29 marks — concentrating on these two units alone puts you well above the pass mark for the theory paper.
| Unit | Key Chapters | Approx. Marks (Theory, out of 70) |
|---|---|---|
| Electrostatics | Electric Charges and Fields, Electric Potential and Capacitance | 15 |
| Current Electricity | Ohm’s Law, Kirchhoff’s Rules, Wheatstone Bridge, Potentiometer | 7 |
| Magnetic Effects and Magnetism | Moving Charges and Magnetism, Magnetism and Matter | 8 |
| Electromagnetic Induction and AC | Faraday’s Laws, Inductance, Alternating Current, Transformers | 8 |
| Electromagnetic Waves | EM Spectrum, Properties of EM Waves | 3 |
| Optics | Ray Optics and Optical Instruments, Wave Optics | 14 |
| Dual Nature of Radiation and Matter | Photoelectric Effect, de Broglie Wavelength | 4 |
| Atoms and Nuclei | Bohr’s Model, Nuclear Fission and Fusion, Radioactivity | 6 |
| Electronic Devices | Semiconductors, p-n Junction Diode, Transistors, Logic Gates | 5 |
| Total | 70 |
Top-scoring chapters in Physics: Electrostatics typically includes a 5-mark long-answer derivation every year — practise Gauss’s Law applications for different charge distributions and capacitor combinations. Wave Optics covers interference and diffraction, which are tested in standard formats repeatedly; know Young’s double slit experiment derivation thoroughly. Electromagnetic Induction and AC Circuits together carry 8 marks and offer reliable derivation questions on mutual inductance and transformer principles.
Chapter-Wise Weightage for Chemistry
The AHSEC Class 12 Chemistry theory paper is out of 70 marks. Practical marks (30 marks) from the main exam are carried forward. Organic Chemistry chapters dominate the second half of the paper, while Physical Chemistry units follow predictable numerical patterns that are highly scoring for well-prepared students.
| Unit / Chapter | Topics | Approx. Marks (Theory, out of 70) |
|---|---|---|
| Solid State | Crystal Systems, Packing Efficiency, Defects in Solids | 4 |
| Solutions | Colligative Properties, Raoult’s Law, van’t Hoff Factor | 5 |
| Electrochemistry | Galvanic Cells, Nernst Equation, Conductance | 5 |
| Chemical Kinetics | Rate Laws, Order of Reaction, Arrhenius Equation | 5 |
| Surface Chemistry | Adsorption, Colloids, Emulsions, Catalysis | 3 |
| General Principles of Isolation of Metals | Metallurgical Processes, Refining Methods | 3 |
| p-Block Elements | Group 15, 16, 17 and 18 Elements, Oxoacids | 8 |
| d and f Block Elements | Transition Elements, Lanthanides, Actinides | 5 |
| Coordination Compounds | Werner’s Theory, IUPAC Naming, Isomerism, Bonding | 5 |
| Haloalkanes and Haloarenes | Nucleophilic Substitution, Elimination Reactions | 4 |
| Alcohols, Phenols and Ethers | Classification, Chemical Properties, Reactions | 4 |
| Aldehydes, Ketones and Carboxylic Acids | Nucleophilic Addition, Aldol Condensation, Cannizzaro Reaction | 6 |
| Organic Compounds with Nitrogen (Amines) | Classification, Basicity, Diazonium Salts | 4 |
| Biomolecules | Carbohydrates, Proteins, Nucleic Acids, Vitamins | 4 |
| Polymers | Classification, Natural and Synthetic Polymers | 3 |
| Chemistry in Everyday Life | Drugs, Food Additives, Cleansing Agents | 2 |
| Total | 70 |
Top-scoring chapters in Chemistry: p-Block Elements is the single highest-scoring inorganic chapter at 8 marks — revise Group 15, 16 and 17 reactions, oxoacid structures and Group 18 properties in detail. Aldehydes, Ketones and Carboxylic Acids (6 marks) rewards students who practise named reactions thoroughly; Aldol Condensation, Cannizzaro Reaction and Clemmensen Reduction are examined almost every year. Electrochemistry and Chemical Kinetics together contribute 10 marks through numerical-based questions; practise the Nernst equation, half-life calculations and integrated rate law expressions.
High-Scoring Topics and Preparation Strategy for Compartment Students
With limited days for revision, targeting the highest-weightage chapters across Mathematics, Physics and Chemistry gives you the maximum marks return for every hour of preparation. The table below identifies the three chapters in each subject that you should cover first.
| Subject | Top 3 High-Scoring Chapters | Combined Approx. Marks |
|---|---|---|
| Mathematics | Integrals and Applications, Vectors and 3D Geometry, Determinants and Matrices | ~39 |
| Physics | Electrostatics, Optics, Electromagnetic Induction and AC | ~37 |
| Chemistry | p-Block Elements, Aldehydes/Ketones/Carboxylic Acids, Electrochemistry and Chemical Kinetics | ~24 |
Key preparation tips for AHSEC Compartment 2026:
- Solve at least three years of previous AHSEC question papers — the chapter distribution and question types remain largely consistent from year to year, making past papers the most reliable preparation tool.
- Follow NCERT textbook examples and exercises first — AHSEC questions in all three subjects are closely aligned with NCERT Class 11 and 12 content, and most questions are direct adaptations.
- Prioritise standard derivations in Physics — Biot-Savart Law, Gauss’s Law applications, lens maker’s equation and transformer working principle appear regularly in 5-mark long-answer questions.
- Revise named reactions in Chemistry — Aldol Condensation, Cannizzaro Reaction, Reimer-Tiemann Reaction and Sandmeyer Reaction are asked almost every year and carry 2–3 marks each.
- Show all working steps in Mathematics — AHSEC awards marks for method and intermediate steps, so writing out every step can recover marks even if your final answer has a calculation error.
AHSEC Class 12 Compartment 2026 Chapter Weightage FAQs
Ques. Which chapter has the highest weightage in AHSEC Class 12 Mathematics for Compartment 2026?
Ans. Calculus is the highest-weightage unit in AHSEC Class 12 Mathematics, carrying approximately 35 marks out of 80 in the theory paper. Within Calculus, Integrals and Applications of Derivatives are the most mark-heavy chapters and should be your first revision priority.
Ques. What is the total marks for AHSEC Class 12 Physics in the compartment exam?
Ans. The AHSEC Class 12 Physics compartment theory paper is out of 70 marks. The remaining 30 marks are for practicals, which are carried forward from the main HS 2nd Year examination. You only need to appear for the 70-mark theory paper during the compartment exam.
Ques. Which are the top-priority Chemistry chapters for AHSEC Class 12 Compartment 2026?
Ans. The top-priority chapters are p-Block Elements (8 marks), Aldehydes, Ketones and Carboxylic Acids (6 marks), Electrochemistry (5 marks), Chemical Kinetics (5 marks) and Coordination Compounds (5 marks). These five chapters together account for approximately 29 marks in the 70-mark Chemistry theory paper.
Ques. Does the AHSEC Compartment 2026 exam have a different syllabus from the main HS 2nd Year exam?
Ans. No, the AHSEC Compartment 2026 exam follows the same full syllabus and question paper blueprint as the main HS 2nd Year examination. There is no separate or reduced syllabus for compartment students — you must prepare the complete Class 12 syllabus for the subject you are appearing in.
Ques. Are practical marks included in the AHSEC Compartment 2026 result?
Ans. Yes, practical marks are included in the final result for compartment students. You do not need to re-appear for practicals. The practical marks scored in the main HS 2nd Year examination are carried forward and added to the theory marks you score in the compartment exam to calculate your final result.
Ques. Where can I find the AHSEC Compartment 2026 exam schedule and admit card?
Ans. The AHSEC Compartment 2026 exam schedule, admit card download link and all official notifications are available on the official AHSEC website at ahsec.assam.gov.in. Check the portal regularly for the latest updates on exam dates and hall ticket release.
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