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Chemistry Science (English Medium) Class 11 CBSE Syllabus 2026-27

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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

#Unit/TopicWeightage
1  Some Basic Concepts of Chemistry 
2  Structure of Atom 
3  Classification of Elements and Periodicity in Properties 
4  Chemical Bonding and Molecular Structure 
5  Chemical Thermodynamics 
5  States of Matter:- Gases and Liquids 
6  Equilibrium 
7  Redox Reactions 
8  Organic Chemistry - Some Basic Principles and Techniques 
9  Hydrogen 
9  Hydrocarbons 
10  S-block Elements (Alkali and Alkaline Earth Metals) 
11  Some P-block Elements 
14  Environmental Chemistry 
 Total -
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Syllabus

1 Some Basic Concepts of Chemistry [Revision]
2 Structure of Atom [Revision]
3 Classification of Elements and Periodicity in Properties [Revision]
4 Chemical Bonding and Molecular Structure [Revision]
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
    • Enthalpy, H - a Useful New State Function  
    • Enthalpy, H - Extensive and Intensive Properties  
    • Enthalpy, H - Heat Capacity  
    • Enthalpy, H - The Relationship Between Cp and Cv for an Ideal Gas  
  • Measurement of ∆U and ∆H Calorimetry - ∆U Measurements  
  • Measurement of ∆U and ∆H Calorimetry - ∆H Measurements  
  • Enthalpy Change, ∆_rH of a Reaction - Reaction Enthalpy  
    • Standard Enthalpy of Reactions  
    • Enthalpy Changes During Phase Transformations  
      • Enthalpy of fusion
      • Enthalpy of vaporization
      • Enthalpy of sublimation
    • Standard Enthalpy of Formation  
    • Thermochemical Equations  
      • Heat of combustion
      • Molar heat capacities
      • Relation between Cp and Cv for an ideal gas
  • Chemical Thermodynamics and Energetic  
  • Enthalpies for Different Types of Reactions  
    • Standard Enthalpy of Combustion  
    • Enthalpy of Atomization  
    • Bond Enthalpy  
      • Bond dissociation enthalpy
      • Diatomic Molecules
      • Polyatomic Molecules
      • Mean bond enthalpy of C - H bond
    • Enthalpy of Solution  
    • Lattice Enthalpy  
      • Born-Haber Cycle
      • Enthalpy of ionization
  • Spontaneity  
    • Is Decrease in Enthalpy a Criterion for Spontaneity  
    • Entropy and Spontaneity  
    • Gibbs Energy and Spontaneity  
    • Entropy and Second Law of Thermodynamics  
    • Absolute Entropy and Third Law of Thermodynamics  
  • Gibbs Energy Change and Equilibrium  
    • Relation between standard Gibbs energy change and equilibrium constant
5 States of Matter:- Gases and Liquids [Revision]
6 Equilibrium [Revision]
  • Concept of Equilibrium  
    • Equilibrium
    • Equilibrium state
    • Equilibrium mixture
    • Dynamic equilibrium
    • Chemical equilibrium
    • Ionic equilibrium
  • Equilibrium in Physical Processes  
    • Solid-liquid Equilibrium  
    • Liquid-vapour Equilibrium  
    • Solid - Vapour Equilibrium  
    • General Characteristics of Equilibria Involving Physical Processes  
  • Equilibrium Involving Dissolution of Solid in Liquids  
  • Equilibrium Involving Dissolution of Gases in Liquids  
    • Henry's law
  • 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  
    • Relationship between equilibrium constant, reaction quotient and change in Gibbs energy
  • Factors affecting equilibria  
    • Effect of Concentration Change  
    • Effect of Pressure Change  
    • Effect of Inert Gas Addition  
    • Effect of Temperature Change  
    • Effect of Catalyst  
  • Ionic Equilibrium in Solution  
  • Concept of Acid, Base, and Salt  
    • Arrhenius Concept of Acids and Bases  
  • Concept of Ionization of Acids and Bases  
  • Ionization of Acids and Bases  
    • The Ionization Constant of Water and Its Ionic Product  
      • Ionic product of water (Kw)
      • Value of Kw
    • Ionization Constants of Weak Acids  
      • Degree of ionization
    • Ionization of Weak Bases  
    • Relation Between Ka and Kb  
    • Di- and Polybasic Acids and Di- and Polyacidic Bases  
      • Ionization of polybasic acids
    • Factors Affecting Acid Strength  
    • Common Ion Effect in the Ionization of Acids and Bases  
    • Hydrolysis of Salts and the Ph of Their Solutions  
      • Hydrolysis of salt
      • Hydrolysis constant
      • Degree of hydrolysis (h)
      • Types of salts and their hydrolysis
  • The pH Scale  
  • 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  
    • Metal activity series or electrochemical series
  • Oxidation Number  
    • Types of Redox Reactions  
    • Redox Reactions as the Basis for Titrations  
      • Oxidation number in redox reactions
    • Limitations of Concept of Oxidation Number  
  • Balancing of Redox Reactions  
  • Redox Reactions and Electrode Processes  
    • Direct redox reactions
    • Daniel cell
    • Standard electrode potential
8 Organic Chemistry - Some Basic Principles and Techniques [Revision]
  • Tetravalence of Carbon - Shapes of Organic Compounds  
    • Tetravalency of carbon
    • The Shapes of Carbon Compounds
    • Some Characteristic Features of σ and π Bonds
  • 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  
      • Rules for IUPAC nomenclature of saturated hydrocarbons (alkanes)
      • Rules for naming cyclic or alicyclic hydrocarbons
      • Rules for naming compounds containing double and triple bonds
      • Straight chain hydrocarbons
      • Branched-chain hydrocarbons,
      • Nomenclature of branched-chain alkanes
      • Cyclic Compounds
    • 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  
      • Heterolytic cleavage
      • Homolytic cleavage
      • Free radicals
      • Carbocations, and carbanions
      • Stability of carbocations and free radicals
    • Nucleophiles and Electrophiles  
    • Electron Movement in Organic Reactions  
    • Electron Displacement Effects in Covalent Bonds  
      • Electronic displacement in covalent bond
      • Significance of electronic displacement
    • Resonance Structure  
    • Types of Organic Reactions and Mechanisms  
      • Substitution reactions
      • Addition reactions
      • Elimination reactions
      • Rearrangement reactions
      • Condensation reaction
      • Isomerisation reaction
  • Purification of Organic Compounds  
  • Sublimation  
    • Introduction
    • Definition: Sublimation
    • Experiment: Sublimation
  • Methods of Separation  
  • Qualitative Analysis of Organic Compounds - Detection of Carbon and Hydrogen  
  • Qualitative Analysis of Organic Compounds - Detection of Other Elements  
    • Test for Nitrogen
    • Test for Sulphur
    • Test for Halogens
    • Test for Phosphorus
  • Quantitative Analysis of Carbon and Hydrogen  
  • Quantitative Analysis of Nitrogen  
    • Dumas method
    • Kjeldahl’s method
  • Quantitative Analysis of Halogens  
    • Carius method
  • 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
    1. Reaction with metals
    2. Reaction with non-metals
    3. Reaction with metal ions and metal oxides
    4. 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:
    1. Nature
    2. Boiling point
    3. The freezing point of water or melting point of ice
    4. Density
    5. Anomalous expansion of water
    6. Latent heat of fusion of ice
    7. Latent heat of vaporization of water
    8. 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
    1. Dissociation of water
    2. Amphoteric nature
    3. Oxidising and reducing nature
    4. Hydrolytic reactions
    5. Formation of hydrates with metal salts
  • Classification of water: Soft and Hard Water  
    • Soft and Hard water
    • Types of Hard water
    1. Temporary Hardness
    2. Permanent Hardness
  • Preparation of Hydrogen Peroxide  
    • Hydrogen peroxide (H2O2)
    • Preparation of hydrogen peroxide (H2O2)
    1. Merck's. process (Laboratory method)
    2. By the action of sulphuric acid or phosphoric acid on hydrated barium peroxide BaO2.8H2O
    3. Industrial method
    4. 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
    1. Decomposition
    2. Oxidizing and reducing nature
    3. Oxidizing character
    4. Reducing character
    5. Bleaching action
    6. 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  
    • Conformations (Ethane)  
      • Conformations
      • Conformations of ethane: Eclipsed and Staggered conformation 
      • Representation: Sawhorse and Newman projections
      • Relative stabilities of the conformations of ethane
  • Physical Properties of Alkanes  
  • Chemical Properties of Alkanes  
  • Alkenes  
    • Definition: Alkenes
    • Structure of Double Bond (Ethene)  
      • Electronic structure of ethene or ethylene
    • Nomenclature  
      • Nomenclature of alkenes
      • Common names
      • IUPAC nomenclature
      • The common and IUPAC names of some alkenes
    • Preparation of Alkenes from Alkynes, Alkyl Halides, Vicinal Dihalides and Alcohols by Acidic Dehydration  
  • Isomerism  
    • Definition: Isomers
  • Alkynes  
    • Definition: Alkynes
    • Nomenclature and Isomerism  
    • Structure of Triple Bond  
    • Preparation of Alkynes  
    • Chemical Properties of Alkynes  
  • Aromatic Hydrocarbons  
    • Nomenclature and Isomerism  
      • Nomenclature of Aromatic hydrocarbons: IUPAC nomenclature
      • Isomerism in Aromatic hydrocarbons
    • Structure of Benzene  
    • Aromaticity (Huckel Rule)  
      • Aromaticity: 
      • Huckel rule and its applications
      • Antiaromaticity
    • Preparation of Benzene  
    • Electrophilic Substitution Reactions  
    • Concept of Reactivity in Electrophilic Substitution ESR  
    • Directive Influence of a Functional Group in Monosubstituted Benzene  
      • Directive effect
      • Activity effects
      • Ortho, para, and meta directing groups
  • 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
    1. Oxides and Hydroxides
    2. Halides - Structure of BeCl2
    3. 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
    1. Oxidation states
    2. Metallic and nonmetallic character
    3. Variation in physical properties
    4. 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
      1. Smoke
      2. Dust
      3. Fumes
      4. Mists
      5. 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
  • International Standards for Drinking Water  
    • Fluoride, Lead, Sulphate, Nitrate, Other metals
  • Environmental Issues  
  • Industrial Waste  
    • Types of industrial waste
    1. Biodegradable wastes
    2. Non-biodegradable wastes
  • Strategies to Control Environmental Pollution  
    • Strategy to control environmental pollution
    1. Incineration
    2. Digestion
    3. Collection and disposal
    4. Sewage treatment
    5. 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

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