CBSE Class 11 Chemistry Syllabus 2026-27

Introduction

Class 11 Chemistry under CBSE introduces students to the fascinating world of matter, its structure, properties, and transformations. The 2026-27 syllabus spans physical, inorganic, and organic chemistry, giving students a well-rounded foundation for board examinations and competitive tests like JEE and NEET.

This page covers the complete CBSE Class 11 Chemistry syllabus for 2026-27, with unit-wise chapter breakdowns, exam pattern details, marking scheme, recommended books, and targeted preparation advice for every student.

Quick Facts

Exam Pattern

Unit-wise Syllabus

Unit 1: Some Basic Concepts of Chemistry

This foundational unit establishes the quantitative language of chemistry, covering molar mass, stoichiometry, and concentration expressions that are used throughout all subsequent units.

•      General Introduction: Importance and Scope of Chemistry

•      Nature of Matter: Laws of Chemical Combination

•      Dalton's Atomic Theory: Concept of Elements, Atoms, and Molecules

•      Atomic and Molecular Masses, Mole Concept, Molar Mass

•      Percentage Composition, Empirical and Molecular Formula

•      Chemical Reactions, Stoichiometry and Calculations Based on Stoichiometry

Unit 2: Structure of Atom

•      Atomic Models: Thomson, Rutherford, Bohr (including drawbacks)

•      Nature of Electromagnetic Radiation, Photoelectric Effect

•      Spectrum of Hydrogen Atom, Bohr's Model

•      de Broglie's Relationship, Heisenberg Uncertainty Principle

•      Orbitals and Quantum Numbers: n, l, m, s

•      Shapes of s, p, d Orbitals, Rules for Filling Orbitals

•      Aufbau Principle, Pauli Exclusion Principle, Hund's Rule

•      Electronic Configuration of Atoms and Stability of Half-filled Orbitals

Unit 3: Classification of Elements and Periodicity in Properties

•      Significance of Classification, Brief History of Periodic Table

•      Modern Periodic Law and Present Form of Periodic Table

•      Periodic Trends: Atomic Radii, Ionic Radii, Inert Gas Radii

•      Ionisation Enthalpy, Electron Gain Enthalpy, Electronegativity

•      Valence and Oxidation States

Unit 4: Chemical Bonding and Molecular Structure

•      Valence Electrons, Ionic Bond, Covalent Bond, Bond Parameters

•      Lewis Structure, Polar Character of Covalent Bond

•      Covalent Character of Ionic Bond, Valence Bond Theory

•      Resonance, Geometry of Covalent Molecules

•      VSEPR Theory, Hybridisation of Atomic Orbitals (s, p, d)

•      Molecular Orbital Theory: Bonding and Antibonding MOs, Bond Order

•      Hydrogen Bonding and its Effects on Properties

Unit 5: Chemical Thermodynamics

•      Concepts of System, Surroundings and Types of Systems

•      Internal Energy, Enthalpy (H), Work and Heat

•      First Law of Thermodynamics, Hess's Law of Constant Heat Summation

•      Enthalpy of Bond Dissociation, Combustion, Formation, Atomisation

•      Second Law of Thermodynamics: Entropy and Spontaneity

•      Gibbs Energy Change and Equilibrium

Unit 6: Equilibrium

•      Equilibrium in Physical and Chemical Processes

•      Dynamic Equilibrium, Law of Mass Action, Equilibrium Constant (Kp and Kc)

•      Factors Affecting Equilibrium: Le Chatelier's Principle

•      Ionic Equilibrium: Ionisation of Acids and Bases

•      Strong and Weak Electrolytes, Degree of Ionisation, pH

•      Hydrolysis of Salts, Buffer Solutions, Solubility Product

Unit 7: Redox Reactions

•      Concept of Oxidation and Reduction, Redox Reactions

•      Oxidation Number, Balancing Redox Reactions by Oxidation Number and Half-reaction Method

•      Applications of Redox Reactions

Unit 8: Organic Chemistry: Some Basic Principles and Techniques

•      General Introduction: Methods of Purification

•      Qualitative and Quantitative Analysis

•      Classification and IUPAC Nomenclature of Organic Compounds

•      Electronic Displacements in Covalent Bond

•      Inductive Effect, Electromeric Effect, Resonance, Hyperconjugation

•      Homolytic and Heterolytic Fission, Free Radicals, Carbocations, Carbanions

•      Types of Organic Reactions: Substitution, Addition, Elimination

Unit 9: Hydrocarbons

•      Classification of Hydrocarbons

•      Alkanes: Nomenclature, Isomerism, Conformations, Physical and Chemical Properties

•      Alkenes: Nomenclature, Structure of Double Bond, Geometric Isomerism

•      Alkynes: Nomenclature, Structure of Triple Bond, Acidic Character

•      Aromatic Hydrocarbons: Introduction, IUPAC Nomenclature, Benzene

•      Carcinogenicity and Toxicity of Aromatic Compounds

Chapter Overview Table

Practical Syllabus

Recommended Books

Preparation Tips for Class 11 Chemistry

Divide Your Study into Physical, Inorganic, and Organic Segments

Chemistry has three distinct branches that require different study approaches. Physical Chemistry involves numerical calculations and formula application. Inorganic Chemistry demands systematic memorisation of trends and properties. Organic Chemistry requires understanding of reaction mechanisms and nomenclature rules. Study each branch with its appropriate method.

Build Proficiency in Mole Concept Early

The mole concept in Unit 1 is the backbone of all numerical problems in Chemistry. Mastering stoichiometry, limiting reagent calculations, and concentration expressions at the beginning of the year saves considerable time later when these skills are needed in thermodynamics, equilibrium, and electrochemistry.

Practise Organic Mechanisms Visually

Organic Chemistry is best learned by drawing reaction mechanisms on paper rather than memorising them. Understand the role of electron pairs, inductive and mesomeric effects, and practice naming compounds using IUPAC rules until it becomes automatic.

Keep a Reaction and Formula Register

Maintain a dedicated notebook for important chemical reactions, equations, and formulas. Reviewing this register regularly as a quick revision tool is far more effective than re-reading entire chapters.

Take Laboratory Work Seriously

The practical component carries 30 marks, which can significantly boost your final score. Regular lab practice for titrations, salt analysis, and qualitative tests ensures accuracy and speed during the practical examination. Also prepare thoroughly for the viva voce.

Frequently Asked Questions

What is the subject code for Chemistry in CBSE Class 11?

The subject code for CBSE Class 11 Chemistry is 043.

How many units are there in Class 11 Chemistry?

The CBSE Class 11 Chemistry syllabus for 2026-27 has nine units, covering physical, inorganic, and organic chemistry.

What is the practical marks distribution in Class 11 Chemistry?

Practical marks total 30 and are divided among volumetric analysis, salt analysis, content-based experiments, project work, and class record with viva voce.

Is Physical Chemistry or Organic Chemistry more important for NEET?

Both are equally important for NEET. Physical Chemistry requires strong numerics, Organic Chemistry tests mechanism understanding, and Inorganic Chemistry tests periodic trends and reactions. NEET questions are distributed across all three branches.

Are NCERT examples and exercises enough for Class 11 Chemistry boards?

For scoring 70 and above in the theory paper, NCERT textbook examples and exercises are generally sufficient. For higher scores and competitive exam readiness, supplementing with exemplar problems and one reference book is recommended.