CBSE Class 11 Chemistry 2026-27 Syllabus
The syllabus consists of nine units: (i) Some Basic Concepts of Chemistry (ii) Structure of Atom (iii) Classification of Elements & Periodicity in Properties (iv) Chemical Bonding and Molecular Structure (v) Chemical Thermodynamics (vi) Equilibrium (vii) Redox Reactions (viii) Organic Chemistry (ix) Hydrocarbons.
Exam Structure
| Unit | Title | Marks |
| 1 | Some Basic Concepts of Chemistry | 7 |
| 2 | Structure of Atom | 9 |
| 3 | Classification of Elements & Periodicity in Properties | 6 |
| 4 | Chemical Bonding and Molecular Structure | 7 |
| 5 | Chemical Thermodynamics | 9 |
| 6 | Equilibrium | 7 |
| 7 | Redox Reactions | 4 |
| 8 | Organic Chemistry: Basic Principles & Techniques | 11 |
| 9 | Hydrocarbons | 10 |
| Total | 70 |
Unit 1: 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 2: 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 3: 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 4: 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 5: 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 6: 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 7: 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 8: Organic Chemistry - 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 9: Hydrocarbons
Classification, Alkanes, Alkenes, Alkynes, Aromatic Hydrocarbon, Carcinogenic and Toxicity.