CBSE Class 11 Chemistry Syllabus 2026-27
CBSE (Central Board of Secondary Education) released the CBSE Class 11 Chemistry Syllabus 2026–27 on April 2, 2026. The CBSE Class 11 Chemistry Syllabus 2026–27 is the official curriculum document for the 2026–27 academic session. Students must follow this syllabus for Class 11 annual examinations.
The CBSE Class 11 Chemistry Syllabus 2026–27 defines the unit-wise structure, chapter framework, practical syllabus, and internal assessment scheme.
The syllabus includes topics such as Some Basic Concepts of Chemistry, Structure of Atom, Chemical Bonding, Thermodynamics, Equilibrium, Redox Reactions, and Organic Chemistry fundamentals. CBSE prescribes this structure for question paper preparation and evaluation.
This page explains the CBSE Class 11 Chemistry Exam Pattern 2026–27 in clear terms. It presents the board paper format, unit-wise summary, and marking distribution for theory and practical examinations. Students can understand what to study and how CBSE will assess performance.
Students can download the official CBSE Class 11 Chemistry Syllabus 2026–27 PDF from the link below. Click on Download Now to access the official syllabus document directly.
CBSE Class 11 Chemistry Latest Syllabus 2026-27
| S.No | Unit | Marks | |
| 1 | Some Basic Concepts of Chemistry | 7 | |
| 2 | Structure of Atom | 9 | |
| 3 | Classification of Elements and Periodicity in PropertiesBiology and Human Welfare | 6 | |
| 4 | Chemical Bonding and Molecular Structure | 7 | |
| 5 | Chemical Thermodynamics | 9 | |
| 6 | Equilibrium | 7 | |
| 7 | Redox Reactions | 4 | |
| 8 | Organic Chemistry: Some basic Principles and Techniques | 11 | |
| 9 | Hydrocarbons | 10 | |
| Total | 70 | ||
CBSE Class 11 Chemistry Syllabus 2026-27: Unit-wise Summary
Unit I: Some Basic Concepts of Chemistry
Importance of Chemistry, Nature of Matter, Properties of Matter and their Measurement, Uncertainty in Measurement, Laws of Chemical Combination, Dalton's Atomic Theory, Atomic and Molecular Masses, Mole Concept and Molar Masses, Percentage Composition, Stoichiometry and Stoichiometric Calculations.
Unit II: Structure of Atom
Discovery of Sub-atomic Particles, Atomic Models, Developments Leading to the Bohr’s Model of Atom, Bohr’s Model for Hydrogen Atom, Towards Quantum Mechanical Model of the Atom, Quantum Mechanical Model of Atom.
Unit III: Classification of Elements and Periodicity in Properties
Why we Need to Classify Elements? Genesis of Periodic Classification, Modern Periodic Law and the Present Form of Periodic Table, Nomenclature of Elements with Atomic Number > 100, Electronic Configuration of Elements and the Periodic Table, Electronic Configuration of Elements and Types of Elements: s-, p-, d-, f- Blocks, Periodic Trends in Properties of Elements.
Unit IV: Chemical Bonding and Molecular Structure
Kossel-Lewis Approach to Chemical Bonding, Ionic or Electrovalent Bond, Bond Parameters, The Valence Shell Electron Pair Repulsion (VSEPR) Theory, Valence Bond Theory, Hybridisation, Molecular Orbital Theory, Bonding in Some Homonuclear Diatomic Molecules, Hydrogen Bonding.
Unit V: Thermodynamics
Thermodynamic Terms, Applications, Measurement of ∆U and ∆H: Calorimetry, Enthalpy Change, and ∆H of a Reaction – Reaction Enthalpy, Enthalpies for Different Types of Reactions, Spontaneity, Gibbs Energy Change and Equilibrium.
Unit VI: Equilibrium
Equilibrium in Physical Processes, Equilibrium in Chemical Processes – Dynamic Equilibrium, Law of Chemical Equilibrium and Equilibrium Constant, Homogeneous Equilibria, Heterogeneous Equilibria, Applications of Equilibrium Constants, Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G, Factors Affecting Equilibria, Ionic Equilibrium in Solution, Acids, Bases and Salts, Ionization of Acids and Bases, Buffer Solutions, Solubility Equilibria of Sparingly Soluble Salts.
Unit VII: Redox Reactions
Classical Idea of Redox Reactions – Oxidation and Reduction Reactions, Redox Reactions in Terms of Electron Transfer Reactions, Oxidation Number, Redox Reactions and Electrode Processes.
Unit VIII: Organic Chemistry -Some Basic Principles and Techniques
General Introduction, Tetravalence of Carbon: Shapes of Organic Compounds, Structural Representations of Organic Compounds, Classification of Organic Compounds, Nomenclature of Organic Compounds, Isomerism, Fundamental Concepts in Organic Reaction Mechanism, Methods of Purification of Organic Compounds, Qualitative Analysis of Organic Compounds, Quantitative Analysis
Unit IX: Hydrocarbons
Classification, Alkanes, Alkenes, Alkynes, Aromatic Hydrocarbon, Carcinogenic and Toxicity.
Note: The following topics are included in the syllabus but will be assessed only formatively to reinforce understanding without adding to summative assessments. This reduces academic stress while ensuring meaningful learning. Schools can integrate these with existing chapters as they align well. Relevant NCERT textual material is enclosed for reference.
- s & p Block Elements
Electronic configuration, atomic & Ionic radii, Ionization Enthalpy, Hydration Enthalpy and general trends in physical and chemical properties of s and p block elements across the periods and down the groups; unique behavior of the first element in each group. - The Gaseous State
Qualitative treatment of Gas laws, Ideal gas equation and deviations from it.
Evaluation Scheme for Examination
| Evaluation Scheme for Examination | Marks |
| Volumetric Analysis | 08 |
| Salt Analysis | 08 |
| Content Based Experiment | 06 |
| Project Work | 04 |
| Class record and viva | 04 |
| Total | 30 |
The Changes for Class 11 (2026-27) Year-end Board Examinations are as under:
| (Class-11) | ||
| Periodic Assessment | Academic Session 2025-26 | Academic Session 2026-27 |
| Composition of question paper for year-end examination/ Board Examination (Theory) |
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