CBSE Class 11 Chemistry Syllabus 2026-27: Unit-wise Weightage, Deleted and New Topics

CBSE Class 11 Chemistry Syllabus 2026-27 has been updated. The updated syllabus prioritises conceptual clarity, reduced content, and real-world application of chemistry concepts, while eliminating overly complex and non-essential topics.

 The syllabus of CBSE Class 11 Chemistry 2026-27 covers core areas such as physical, organic, and inorganic chemistry and builds a strong foundation for Class 12 Chemistry and competitive exams. Understanding the updated topics, weightage, deleted, and added syllabus helps in focused and effective preparation.

Latest CBSE Class 11 Chemistry Syllabus 2026-27

The latest CBSE Class 11 Chemistry Syllabus 2026–27 has been thoughtfully revised to create a more streamlined and concept-focused learning framework. The board has reduced the overall content load by removing or trimming selective chapters from inorganic and environmental chemistry, while also eliminating overlapping and less essential topics. 

This rationalisation ensures that students can concentrate on mastering the most important areas of the subject without unnecessary academic pressure.

Here, we have provided the detailed chapter-wise weightage of CBSE Class 11 Chemistry.

CBSE Class 11 Chemistry Unit-wise Syllabus

The unit-wise syllabus presents a systematic and well-defined distribution of topics across various branches of chemistry, including physical, organic, and inorganic chemistry. It enables students to clearly understand the chapter-wise scope, sequence, and interlinking of concepts, thereby supporting structured study planning. 

A thorough awareness of the unit-wise composition also helps in prioritising topics based on their weightage and academic relevance, ensuring a more organised and goal-oriented preparation strategy.

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 – 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 9: Hydrocarbons 

Classification, Alkanes, Alkenes, Alkynes, Aromatic Hydrocarbon, Carcinogenic and Toxicity. 

CBSE Class 11 Chemistry Practical Syllabus

The practical component of the Syllabus of Chemistry CBSE Class 11 2026-27 focuses on experiments, laboratory skills, activities, and record maintenance. Internal assessment includes periodic tests, practical records, activities, and viva-voce. 

CBSE Class 11 Chemistry Deleted Syllabus

The deleted topics are primarily advanced derivations, lengthy numerical methods, and detailed mechanisms that go beyond the foundational understanding required at this level. However, students should still maintain conceptual clarity, as some of these areas may be indirectly useful for competitive exams like JEE and NEET.

CBSE Class 11 Chemistry Added Topics

There are newly added topics as well, which will be assessed for practice and understanding only; not be included in the final marks. 

CBSE Class 11 Chemistry Syllabus 2026-27 PDF

Go through CBSE guidelines and revise topics systematically without missing any updates. Keeping a printed or digital copy ensures quick reference during preparation and revision.

Students can download the CBSE Class 11 Chemistry Syllabus 2026–27 PDF from the following link: 

Download Class 11 Chemistry Syllabus PDF

CBSE Class 11 Chemistry Preparation Tips 

A smart preparation strategy focuses on concept clarity, selective practice, and efficient revision, especially after the latest syllabus reduction. The aim is to strengthen core topics without overinvesting time in deleted or non-evaluative areas.

• Focus on high-weightage units such as Organic Chemistry, Thermodynamics, and Structure of Atom

• Study NCERT line-by-line; prioritize in-text & back exercises

• Avoid deep study of formatively assessed topics( assessed only in the classroom and assignments)

• Practice NCERT + exemplar + PYQs, with focus on quality over quantity

• Maintain short notes for formulas, reactions, and key points

• Give daily time to Organic Chemistry for consistency

• Stay consistent, avoid backlog, and clear doubts quickly