CBSE Class 11 Chemistry Syllabus - Free PDF Download
CBSE Syllabus 2026-27 Class 11: The CBSE Class 11 Chemistry Syllabus for the examination year 2026-27 has been released by the Central Board of Secondary Education, CBSE. The board will hold the final examination at the end of the year following the annual assessment scheme, which has led to the release of the syllabus. The 2026-27 CBSE Class 11 Chemistry Board Exam will entirely be based on the most recent syllabus. Therefore, students must thoroughly understand the new CBSE syllabus to prepare for their annual exam properly.
The detailed CBSE Class 11 Chemistry Syllabus for 2026-27 is below.
Academic year:
CBSE Class 11 Chemistry Revised Syllabus
CBSE Class 11 Chemistry Course Structure 2026-27 With Marking Scheme
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Syllabus
1 Some Basic Concepts of Chemistry [Revision]
- Importance and Scope of Chemistry
- Historical Approach to Particulate Nature of Matter
- Nature of Matter
- Properties of Matter and Their Measurement
- Mass and Weight
- Definition: Mass
- Definition: Weight
- Uncertainty in Measurement
- Dimensional Analysis
- Significant Figures
- Introduction
- The Five Essential Rules
- Order of magnitude
- Example
- Laws of Chemical Combination
- Law of Constant Proportions (Law of Definite Proportions)
- Introduction
- Antoine Lavoisier: The Father of Modern Chemistry
- Verification of The Law of Constant Proportion
- Gay Lussac’s Law of Gaseous Volumes
- Law of Constant Proportions (Law of Definite Proportions)
- Avogadro's Law
- Definition: Atom
- Definition: Molecule
- Definition: Avogadro's Law
- Dalton's Atomic Theory
- Atomic Mass
- Average Atomic Mass
- Formula Mass
- Molecular Mass
- Mole Concept
- Definition: Mole
- Definition: Avogadro's Number
- Percentage Composition
- Definition: Percentage Composition
- Formula: Percentage Composition
- Stoichiometry and Stoichiometric Calculations
- Concentration of a Solution
- Reactions in solutions
- Mass percentage
- Mole fraction
- Molarity
- Molality
- Volume percentage
- Introduction of Some Basic Concepts of Chemistry
2 Structure of Atom [Revision]
- Subatomic Particles
- Atomic Models
- Introduction
- Examples
- J. J. Thomson’s Atomic Model
- Discovery of Electrons
- Thomson’s Plum Pudding Model of the Atom
- Merits and Demerits
- Lord Rutherford’s Atomic model
- Introduction
- Rutherford’s Nuclear atomic model
- Merits and Demerits
- Atomic Number (Z) and Mass Number (A)
- Atomic Mass
- Isotopes
- Definition: Isotopes
- Examples
- Drawbacks of Rutherford Atomic Model
- Wave Nature of Electromagnetic Radiation
- Electromagnetic Waves : Numericals
- Particle Nature of Electromagnetic Radiation: Planck's Quantum Theory of Radiation
- Photoelectric Effect
- Dual Behaviour of Electromagnetic Radiation
- Evidence for the Quantized Electronic Energy Levels - Atomic Spectra
- Bohr’s Model for Hydrogen Atom
- Towards Quantum Mechanical Model of the Atom
- Quantum Mechanical Model of Atom
- Quantum Mechanical Model of the Atom - Orbitals and Quantum Numbers
- Quantum Mechanical Model of the Atom - Concept of Shells and Subshells
- Quantum Mechanical Model of the Atom - Shapes of Atomic Orbitals
- Quantum Mechanical Model of the Atom - Energies of Orbitals
- Quantum Mechanical Model of the Atom - Filling of Orbitals in Atom
- Quantum Mechanical Model of the Atom - Electronic Configuration of Atoms
- Quantum Mechanical Model of the Atom - Stability of Completely Filled and Half Filled Subshells
- Structure of Atom Numericals
3 Classification of Elements and Periodicity in Properties [Revision]
- Significance of Classification of Elements
- Genesis of Periodic Classification
- Modern Periodic Law and the Present Form of the Periodic Table
- Nomenclature of Elements with Atomic Number Greater than 100
- Periodic Table and Electronic Configuration
- Electronic Configurations in Periods
- Electronic configuration in groups
- Electronic configuration in the four blocks - s-Block, p-Block, d-Block, f-Block
- Electronic Configurations and Types of Elements: S-, P-, D-, F- Blocks
- Periodic Properties
- Atomic Size
- Definition: Atomic Size
- Key Points: Atomic Size
- Atomic Size
- Trends in Physical Properties
- Periodic Trends in Chemical Properties
- Periodic Trends and Chemical Reactivity
- Classification of Elements and Periodicity in Properties Numericals
4 Chemical Bonding and Molecular Structure [Revision]
- Kossel and Lewis Approach to Chemical Bonding
- Kossel-lewis Approach to Chemical Bonding - Octet Rule
- Kossel-lewis Approach to Chemical Bonding - Covalent Bond
- Lewis Structures (Lewis Representation of Simple Molecules)
- Formal Charge
- Limitations of the Octet Rule
- Ionic or Electrovalent Bond
- Definition: Ion
- Definition: Cation
- Definition: Anion
- Definition: Electropositive Element
- Definition: Electronegative Element
- Definition: Electrovalent Bond
- Definition: Electrovalent (or Ionic) Compounds
- Definition: Electrovalency
- Bond Parameters
- Valence Shell Electron Pair Repulsion (VSEPR) Theory
- Bonding in Coordination Compounds
- Valence Bond Theory - Orbital Overlap Concept
- Valence Bond Theory - Directional Properties of Bonds
- Valence Bond Theory - Overlapping of Atomic Orbitals
- Valence Bond Theory - Types of Overlapping and Nature of Covalent Bonds
- Valence Bond Theory - Strength of Sigma (σ) bond and pi (π) bond
- Hybridisation
- Molecular Orbital Theory
- Conditions for the Combination of Atomic Orbitals
- Energy Level Diagram for Molecular Orbitals
- Bonding in Some Homonuclear Diatomic Molecules
- Hydrogen Bonding
- Chemical Bonding and Molecular Structure Numericals
- States of Matter
- Three States of Matter
- Comparison of Solids, Liquids, and Gases
5 Chemical Thermodynamics [Revision]
- Thermodynamic Terms
- The State of the System
- The Internal Energy as a State Function - Work
- The Internal Energy as a State Function - Heat
- The Internal Energy as a State Function - the General Case
- First law of Thermodynamics
- Thermodynamics Applications
- Work
- Pressure-volume work, reversible processes, irreversible processes
- Isothermal and free expansion of an ideal gas
- Work
- Enthalpy (H)
- Calorimetric Measurement of ΔU and ΔH
- Enthalpy Change of a Reaction (ΔrH)
- Standard Enthalpy of Formation
- Thermochemical Equations
- Chemical Thermodynamics and Energetic
- Spontaneity
- Is Decrease in Enthalpy a Criterion for Spontaneity
- Entropy and Second Law of Thermodynamics
- Absolute Entropy and Third Law of Thermodynamics
- Gibbs Energy Change and Equilibrium
5 States of Matter:- Gases and Liquids [Revision]
- Intermolecular Forces
- Hydrogen Bond
- Power Plant Based on Thermal Energy
- Key Points: Power Plant Based on Thermal Energy
- Intermolecular Forces Vs. Thermal Interactions
- Gas Laws
- Avogadro's Law
- Definition: Atom
- Definition: Molecule
- Definition: Avogadro's Law
- Ideal Gas Equation
- Density and Molar Mass of a Gaseous Substance
- Dalton’s Law of Partial Pressures
- Dalton’s law of partial pressure
- Graham's law of diffusion
- Kinetic Molecular Theory of Gases
- Behaviour of Real Gases: Deviation from Ideal Gas Behaviour
- Real gases
- Reasons for deviations
- van der Waals equation for real gases
- Effect of pressure
- Compressibility factor (Z)
- Effect of temperature
- Compressibility factor for real gases
- Pressure-Volume isotherms of Carbon dioxide
- Difference between Ideal gas and real gas
- Liquefaction of Gases
- Liquefaction of gases
- Critical constants
i) Critical temperature
ii) Critical pressure
iii) Critical volume - Isotherms of CO2
- Liquid State
- States of Matter
- Three States of Matter
- Comparison of Solids, Liquids, and Gases
6 Equilibrium [Revision]
- Concept of Equilibrium
- Equilibrium in Physical Processes
- Equilibrium Involving Dissolution of Solid in Liquids
- Equilibrium Involving Dissolution of Gases in Liquids
- Equilibrium in Chemical Processes - Dynamic Equilibrium
- Law of Chemical Equilibrium and Equilibrium Constant
- Homogeneous Equlibria
- Equilibrium Constant in Gaseous Systems
- Heterogeneous Equlibria
- Equilibrium constant for heterogeneous equilibria
- Applications of Equilibrium Constants
- Predicting the Extent of a Reaction
- Predicting the Direction of the Reaction
- Calculating Equilibrium Concentrations
- Relationship Between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G
- Factors affecting equilibria
- Ionic Equilibrium in Solution
- Concept of Acid, Base, and Salt
- Arrhenius Concept of Acids and Bases
- Concept of Ionization of Acids and Bases
- The Ionization Constant of Water and Its Ionic Product
- The pH Scale
- Ionization of Acids and Bases
- Ionization Constants of Weak Acids
- Factors Affecting Acid Strength
- Common Ion Effect in the Ionization of Acids and Bases
- Ionization of Weak Bases
- Relation Between Ka and Kb
- Di- and Polybasic Acids and Di- and Polyacidic Bases
- Hydrolysis of Salts and the Ph of Their Solutions
- Buffer Solutions
- Concept of Solubility Equilibria of Sparingly Soluble Salts
7 Redox Reactions [Revision]
- Classical Idea of Redox Reactions - Oxidation and Reduction Reactions
- Redox Reactions in Terms of Electron Transfer Reactions - Introduction
- Redox Reactions in Terms of Electron Transfer Reactions - Competitive Electron Transfer Reactions
- Oxidation Number
- Redox Reactions as the Basis for Titrations
- Limitations of Concept of Oxidation Number
- Balancing of Redox Reactions
- Redox Reactions and Electrode Processes
8 Organic Chemistry - Some Basic Principles and Techniques [Revision]
- Tetravalence of Carbon - Shapes of Organic Compounds
- Structural Representation of Organic Compounds
- Complete, Condensed and Bond-line Structural Formulas
- Three-dimensional Representation of Organic Molecules
- Classification of Organic Compounds
- Nomenclature
- Definition: Nomenclature
- Key Points: Nomenclature of Carbon Compounds
- Nomenclature of Organic Compounds
- IUPAC Nomenclature of Alkanes
- Nomenclature of Organic Compounds having Functional Group(s)
- Nomenclature of Substituted Benzene Compounds
- Isomerism
- Definition: Isomers
- Fundamental Concepts in Organic Reaction Mechanism
- Fission of a Covalent Bond
- Nucleophiles and Electrophiles
- Electron Movement in Organic Reactions
- Electron Displacement Effects in Covalent Bonds
- Resonance Structure
- Types of Organic Reactions and Mechanisms
- Purification of Organic Compounds
- Sublimation
- Introduction
- Definition: Sublimation
- Experiment: Sublimation
- Methods of Separation
- Simple Distillation Method
- Distillation Method
- Experiment 1
- Experiment 2
- Solvent Extraction (Using a Separating Funnel Method)
- Introduction to Separation Using a Separating Funnel
- Experiment
- Chromatography Method
- Introduction
- Experiment
- Simple Distillation Method
- Qualitative Analysis of Organic Compounds
- Qualitative Analysis of Organic Compounds - Detection of Other Elements
- Quantitative Analysis of Carbon and Hydrogen
- Quantitative Analysis of Nitrogen
- Quantitative Analysis of Halogens
- Quantitative Analysis of Sulphur
- Quantitative Analysis of Phosphorus
- Quantitative Analysis of Oxygen
9 Hydrogen [Revision]
- Position of Hydrogen in the Periodic Table
- Hydrogen
- Position of hydrogen in the periodic table
- Dihydrogen
- Occurrence of dihydrogen
- Isotopes of Hydrogen
- Physical constants of H2, D2, and T2
- Preparation of Dihydrogen
- Preparation of Dihydrogen
- By the action of water with metals
- By the action of water on alkali and alkaline earth metal hydrides
- By the reaction of metals like Zn, Sn, and Al with alkalies (NaOH or KOH)
- By the action of metals with acids
- By the electrolysis of acidified water
- Laboratory method
- Preparation of pure hydrogen
- Commercial Production of Dihydrogen
1) From hydrocarbon or coal
2) Bosch process
3) Lane's process
4) By electrolysis of water
- Properties and Uses of Dihydrogen
- Physical Properties
- Physical constants of atomic and molecular properties
- Chemical Properties
- Reaction with metals
- Reaction with non-metals
- Reaction with metal ions and metal oxides
- Reaction with organic compounds
- Uses of Dihydrogen
- Hydrides
- Ionic or Saline Hydrides
- Covalent or Molecular Hydride
- Metallic or Non-stoichiometric (or Interstitial) Hydrides
- Physical Properties of Water
- Physical Properties of Water:
- Nature
- Boiling point
- The freezing point of water or melting point of ice
- Density
- Anomalous expansion of water
- Latent heat of fusion of ice
- Latent heat of vaporization of water
- Specific heat capacity
- Water
- Structure of Water
- Structure of Ice
- Temporary Hardness of Water
- Boiling
- Clark's method
- Permanent Hardness of Water
Treatment with washing soda (sodium carbonate), Calgon’s method, Ion-exchange method, Synthetic resins method
- Chemical Properties of Water
- Chemical properties
- Dissociation of water
- Amphoteric nature
- Oxidising and reducing nature
- Hydrolytic reactions
- Formation of hydrates with metal salts
- Classification of water: Soft and Hard Water
- Soft and Hard water
- Types of Hard water
- Temporary Hardness
- Permanent Hardness
- Preparation of Hydrogen Peroxide
- Hydrogen peroxide (H2O2)
- Preparation of hydrogen peroxide (H2O2)
- Merck's. process (Laboratory method)
- By the action of sulphuric acid or phosphoric acid on hydrated barium peroxide BaO2.8H2O
- Industrial method
- By redox process
- Preparation of Deuterium
- Electrolysis of heavy water
- Preparation of Tritium
- Physical Properties of Hydrogen Peroxide
- Structure of Hydrogen Peroxide
- Chemical Properties of Hydrogen Peroxide
- Chemical properties of H2O2
- Decomposition
- Oxidizing and reducing nature
- Oxidizing character
- Reducing character
- Bleaching action
- Storage of H2O2
- Storage of Hydrogen Peroxide
- Uses of Hydrogen Peroxide
- Heavy Water
- Heavy water (D2O)
- Preparation
- Properties of heavy water
- Reactions
- Uses of heavy water
- Dihydrogen as a Fuel
9 Hydrocarbons [Revision]
- Classification of Hydrocarbons
- Alkanes
- Definition: Alkanes
- Nomenclature and Isomerism
- Preparation of Alkanes from Unsaturated Hydrocarbons, Alkyl Halides and Carboxylic Acids
- Physical Properties of Alkanes
- Chemical Properties of Alkanes
- Alkenes
- Definition: Alkenes
- Structure of Double Bond (Ethene)
- Nomenclature
- Preparation of Alkenes from Alkynes, Alkyl Halides, Vicinal Dihalides and Alcohols by Acidic Dehydration
- Physical Properties of Alkenes
- Key Points: Physical Properties of Alkenes
- Chemical Properties of Alkenes
- Key Points: Chemical Properties of Alkenes
- Isomerism
- Definition: Isomers
- Alkynes
- Definition: Alkynes
- Nomenclature and Isomerism
- Structure of Triple Bond
- Aromatic Hydrocarbons
- Nomenclature and Isomerism
- Structure of Benzene
- Concept of Reactivity in Electrophilic Substitution ESR
- Directive Influence of a Functional Group in Monosubstituted Benzene
- Physical Properties of Aromatic Hydrocarbons
- Chemical Properties of Aromatic Hydrocarbons
- Carcinogenicity and Toxicity
10 S-block Elements (Alkali and Alkaline Earth Metals) [Revision]
- Group 1 Elements - Alkali Metals
- General Characteristics of the Compounds of the Alkali Metals
- Oxides and hydroxides
- Halides
- Salts of Oxo-Acids
- Anomalous Properties of Lithium
- Points of Difference between Lithium and other Alkali Metals
- Anomalous behaviour of lithium
- Lithium differs from other alkali metals
- Diagonal relationship of Li with Mg
- Similarities between Li and Mg
- Some Important Compounds of Sodium
- Sodium Carbonate (Washing Soda), Na2CO3 10H2O
- Sodium Chloride, NaCl
- Sodium Hydroxide (Caustic Soda), NaOH
- Sodium Hydrogencarbonate (Baking Soda), NaHCO3
- Biological Importance of Sodium and Potassium
- Group 2 Elements - Alkaline Earth Metals
- General Characteristics of the Compounds of the Alkaline Earth Metals
- General characteristics of some compounds of the alkaline earth metals
- Oxides and Hydroxides
- Halides - Structure of BeCl2
- Salts of Oxoacids
- Carbonates of group 2 elements
- Sulphates of group 2 elements
- Nitrates of group 2 elements
- Anomalous Behaviour of Beryllium
- Anomalous behaviour of beryllium
- Be differs from other alkaline earth metals
- Diagonal Relationship between Beryllium and Aluminium
- Reasons for diagonal relationship
- Similarities between Be and Al
- Some Important Compounds of Calcium
- Calcium oxide or Quick Lime (CaO)
- Uses of lime
- Calcium Hydroxide (Slaked lime), Ca(OH)2
- Uses of slaked lime
- Calcium Carbonate (CaCO3) or limestone
- Uses of limestone
- Calcium Sulphate (Plaster of Paris), CaSO4.½ H2O
- Uses of plaster of Paris
- Uses of cement
- Biological Importance of Magnesium and Calcium
- Role of Mg in biological system
- Role of Ca in biological system
11 Some P-block Elements [Revision]
- Introduction to p-block Elements
- General introduction of p-block elements
- Electronic configuration of p-block elements
- General characteristics of p-block elements
- Oxidation states
- Metallic and nonmetallic character
- Variation in physical properties
- Difference in behaviour of first element of each group
- Group 13 Elements - The Boron Family
- Important Trends and Anomalous Properties of Boron
- Important Compounds of Boron
- Uses of Boron and Aluminium
- Group 14 Elements - The Carbon Family
- Important Trends and Anomalous Behaviour of Carbon
- The tendency for catenation
- Allotropes of Carbon > Graphite
- Graphite
- Experiment
- Uses of Graphite
- Allotropes of Carbon > Fullerene
- Fullerene
- Uses of Fullerene
- Allotropes of Carbon > Diamond
- Crystalline Forms
- Diamond
- Uses of Diamond
- Some Important Compounds of Carbon and Silicon - Carbon Monoxide
- Some Important Compounds of Carbon and Silicon - Carbon Dioxide
- Some Important Compounds of Carbon and Silicon - Silicon Dioxide
- Some Important Compounds of Carbon and Silicon - Silicones
- Some Important Compounds of Carbon and Silicon - Silicates
- Some Important Compounds of Carbon and Silicon - Zeolites
14 Environmental Chemistry [Revision]
- Atmospheric Pollution
- Tropospheric Pollution - Gaseous Air Pollutants
- Air pollution
- Types of Air pollution
1) Tropospheric pollution
2) Stratospheric pollution - Sources of air pollution
- Types of air pollutants
1) Primary air pollutants
2) Secondary air pollutants - Major atmospheric pollutants
1) Oxides of carbon: Carbon monoxide (CO), Carbon dioxide (CO2), Sulphur dioxide (SO2), Nitrogen oxides (NOx), Hydrocarbons - Global Warming and Greenhouse Effect
- Acid rain
- Tropospheric Pollution - Particulate Pollutants
- Particulate pollutants
- Source
- Smoke
- Dust
- Fumes
- Mists
- Effects of air pollution
- Smog
- Effects of photochemical smog
- Acid rain
- Ozone
- Greenhouse effect and global warming
- Stratospheric Pollution
- Stratospheric Pollution
- Formation and Breakdown of Ozone
- The Ozone Hole
- Effects of Depletion of the Ozone Layer
- Tropospheric Pollution - Gaseous Air Pollutants
- International Standards for Drinking Water
- Fluoride, Lead, Sulphate, Nitrate, Other metals
- Environmental Issues
- Industrial Waste
- Types of industrial waste
- Biodegradable wastes
- Non-biodegradable wastes
- Strategies to Control Environmental Pollution
- Strategy to control environmental pollution
- Incineration
- Digestion
- Collection and disposal
- Sewage treatment
- Other strategies
- Green Chemistry - Introduction
- Green Chemistry in Day-to-day Life
- Dry Cleaning of Clothes
- Bleaching of Paper
- Synthesis of Chemicals
- ‘Green Solution’ to Clean Turbid Water
