The Council for the Indian School Certificate Examinations (CISCE) has declared the ISC Class 12 Chemistry Syllabus for the 2025-26 academic session. Students being examined for the ISC Chemistry board examination for Class 12 should carefully review the new syllabus to see chapter-wise weightage, theory topics, practicals and project work instructions.
This article provides the updated ISC Class 12 Chemistry Syllabus 2025-2026, information on how to download it in PDF form, the marking scheme, unit-wise topic details and the practical syllabus.
ISC 12th Chemistry Syllabus 2025-26 PDF Download Link
Students can download the official ISC Class 12 Chemistry syllabus PDF from the CISCE website or from the provided link below:
Download ISC Chemistry Syllabus 2025-26 PDF
ISC 12th Chemistry Theory Syllabus (Paper I – 70 Marks)
ISC Class 12 Chemistry 2025-26: Detailed Unit-Wise Topics
| Branch | Unit/Chapter | Key Topics |
| Physical Chemistry | Solutions | Colligative properties, Raoult's Law, abnormal molecular mass, van’t Hoff factor |
| Electrochemistry | Electrochemical cells, Nernst equation, electrochemical series, conductance, Faraday's laws | |
| Chemical Kinetics | Rate laws, order & molecularity, Arrhenius equation, activation energy | |
| Inorganic Chemistry | d- and f-Block Elements | Trends in properties, KMnO₄ & K₂Cr₂O₇, lanthanoid contraction |
| Coordination Compounds | Ligands, isomerism, VBT & CFT, IUPAC nomenclature, bonding | |
| Organic Chemistry | Haloalkanes & Haloarenes | SN1/SN2 reactions, environmental effects (DDT, freons) |
| Alcohols, Phenols, and Ethers | Reactions, dehydration, distinction tests | |
| Aldehydes, Ketones & Carboxylic Acids | Nucleophilic additions, Cannizzaro reaction, Aldol condensation | |
| Organic Compounds Containing Nitrogen | Amines, diazonium salts, electrophilic substitution | |
| Biomolecules | Carbohydrates, proteins, nucleic acids, vitamins (A, B, C, D, E, K) |
Unit-wise Marking Scheme
| Section | Unit Name | Marks |
| Physical Chemistry | Solutions, Electrochemistry, Chemical Kinetics | 25 |
| Inorganic Chemistry | d- and f-Block Elements, Coordination Compounds | 14 |
| Organic Chemistry | Haloalkanes and Haloarenes, Alcohols, Phenols and Ethers, Aldehydes, Ketones and Carboxylic Acids, Organic Compounds Containing Nitrogen, Biomolecules | 31 |
| Total | 70 |
ISC Chemistry Practical Syllabus 2025-26 (Paper II – 15 Marks)
List of Experiments
| Practical Components | Topics |
| 1. Volumetric Analysis | Redox titrations (KMnO₄ with oxalic acid/FeSO₄) |
| 2. Rate of Reaction | e.g. Na₂S₂O₃ with HCl, Mg with H₂SO₄ |
| 3. Organic Compounds Identification | Alcohols (glycerol), aldehydes (formaldehyde), ketones (acetone), acids (benzoic acid), amines (aniline) |
| 4. Carbohydrates & Proteins | Glucose (carb), Milk (protein) |
| 5. pH Experiments | pH with indicator, compare strong vs weak acids |
| 6. Electrochemistry | Zn/Cu cell, variation with CuSO₄ and ZnSO₄ |
| 7. Qualitative Analysis | Detection of one salt (cation + anion) |
Anions & Cations for Qualitative Analysis
| Anions | Cations |
| CO₃²⁻, NO₂⁻, S²⁻, SO₃²⁻, SO₄²⁻, NO₃⁻, CH₃COO⁻, Cl⁻, Br⁻, I⁻, C₂O₄²⁻, PO₄³⁻ | NH₄⁺, Pb²⁺, Cu²⁺, Al³⁺, Fe³⁺, Zn²⁺, Mn²⁺, Ni²⁺, Co²⁺, Ba²⁺, Sr²⁺, Ca²⁺, Mg²⁺ |
ISC 12th Chemistry Project Work: 10 Marks
Students must complete one project on topics such as:
- DNA/RNA Structure
- Amino Acids and Proteins
- Carbohydrates and Metabolism
- Vitamins and Hormones
- Synthetic & Natural Polymers
- Chemistry in Medicine or Forensic Studies
- Greenhouse Effect, Environmental Chemistry, etc.
Projects are assessed based on purpose, analysis, creativity, data/graph use, and presentation.
ISC Class 12 Chemistry Practical File: 5 Marks
Students are required to keep a record of all experiments conducted during the academic year in a proper Chemistry practical file, which will be assessed by a visiting examiner.
ISC Chemistry Exam 2026 Preparation Tips
- Ensure that you understand each topic conceptually using reactions, graphs and mechanisms.
- Practice numerical questions, especially in Physical Chemistry.
- Study for the Organic identifications and practicals well.
- Attempt ISC previous years question papers and mock test papers.
Also read: ISC 12th Preparation Tips 2026
The ISC Class 12 Chemistry Syllabus 2025-26 is developed to help students understand the foundational knowledge and ultimately prepare for the impending board examinations and study of any possible scientific disciplines. Students need to learn the theory continuously, but at the same time as their preparation, also complete lab practical experiments. You can download the syllabus in pdf form and start the preparation process as soon as possible!
