CBSE Class 11 Chemistry Syllabus 2025-26 - Updated Curriculum

S.No.

Unit

No. of Periods

Marks

1

Some Basic Concepts of Chemistry

12

7

2

Structure of Atom

14

9

3

Classification of Elements and Periodicity in Properties

8

6

4

Chemical Bonding and Molecular Structure

14

7

5

Chemical Thermodynamics

16

9

6

Equilibrium

14

7

7

Redox Reactions

6

4

8

Organic Chemistry: Some Basic Principles and Techniques

14

11

9

Hydrocarbons

12

10

Total

110

70

Unit

Chapter

Topics

I

Some Basic Concepts of Chemistry

General Introduction, Laws of chemical combination, Dalton's atomic theory, Atomic and molecular masses, Mole concept, Chemical reactions, Stoichiometry

II

Structure of Atom

Discovery of subatomic particles, Atomic numbers, Isotopes and isobars, Atomic models (Thomson, Rutherford, Bohr), Dual nature of matter, Quantum numbers, Orbital shapes, Electron filling rules, Electronic configuration

III

Classification of Elements and Periodicity in Properties

Periodic table, Periodic trends (atomic radii, ionisation enthalpy, electron gain enthalpy, electronegativity, valency)

IV

Chemical Bonding and Molecular Structure

Valence electrons, Ionic bonds, Covalent bonds, Bond parameters, Lewis structures, VSEPR theory, Hybridization, Molecular orbital theory (qualitative), Hydrogen bonding

V

Thermodynamics

Systems and surroundings, Work, Heat, Energy, State functions, First law of thermodynamics (internal energy, enthalpy, heat capacity), Hess's law, Enthalpy changes (bond dissociation, combustion, formation, etc.), Second law (brief introduction - entropy), Third law (brief introduction)

VI

Equilibrium

Physical and chemical equilibrium, Law of mass action, Equilibrium constant, Le Chatelier's principle, Ionic equilibrium (acids & bases, strong & weak electrolytes, pH, hydrolysis, buffer solutions), Solubility product, Common ion effect

VII

Redox Reactions

Oxidation, reduction, Redox reactions, Oxidation number balancing

VIII

Organic Chemistry - Some Basic Principles and Techniques

Introduction, Purification methods, Classification & IUPAC nomenclature, Electronic effects (inductive, electromeric, resonance, hyperconjugation), Bond fission (homolytic, heterolytic), Free radicals, Carbocations, Carbanions, Electrophiles, Nucleophiles, Types of organic reactions

IX

Hydrocarbons

Classification, Nomenclature, Isomerism, Conformation (alkanes only), Physical properties, Chemical reactions (halogenation, combustion, pyrolysis for alkanes; addition reactions for alkenes & alkynes; electrophilic substitution for aromatics)

Unit Number

Chapter Name

Deleted Topics

Added Topics

I

Some Basic Concepts of Chemistry

-

-

II

Structure of Atom

- 

Discovery of Electron, Proton, and Neutron - Atomic number, isotopes, and isobars - Thomson's model and its limitations - Rutherford's model and its limitations

III

Classification of Elements and Periodicity in Properties

- 

Significance of classification, a brief history of the development of the periodic table

IV

Chemical Bonding and Molecular Structure

-

-

V

Chemical Thermodynamics

-

-

VI

Equilibrium

-

-

VII

Redox Reactions

-

-

VIII

Organic Chemistry: Some Basic Principles and Techniques

-

-

IX

Hydrocarbons

-

-

Unit

Chapter Name

Deleted Topics

Content in Deleted Chapters

Chemistry – Part I

Unit V: States of Matter: Gases and Liquids

Entire Chapter

Three states of matter - Intermolecular interactions - Types of bonding (ionic, covalent) - Melting and boiling points - Role of gas laws (Boyle's law, Charles' law, Gay-Lussac's law, Avogadro's law) in understanding molecules - Ideal behaviour of gases - Empirical derivation of the gas equation - Avogadro's number - Ideal gas equation - Deviations from ideal behaviour - Liquefaction of gases - Critical temperature - Kinetic energy and molecular speeds (basic concepts) - Liquid state properties (vapour pressure, viscosity, surface tension - qualitative only)

Chemistry – Part II

Unit IX: Hydrogen

Entire Chapter

Position of hydrogen in the periodic table - Occurrence and isotopes - Preparation, properties, and uses of hydrogen - Hydrides (ionic, covalent, and interstitial) - Physical and chemical properties of water, heavy water, and hydrogen peroxide (preparation, reactions, structure, and uses) - Hydrogen as a fuel

Chemistry – Part II

Unit X: s-Block Elements

Entire Chapter

Group 1 and Group 2 elements: electronic configuration, occurrence, anomalous properties of the first element in each group, diagonal relationships - Trends in properties (ionisation enthalpy, atomic and ionic radii) - Trends in chemical reactivity with oxygen, water, hydrogen, and halogens - Uses of elements and some important compounds (Sodium Carbonate, Sodium Chloride, Sodium Hydroxide, Sodium hydrogen carbonate, Calcium Oxide, Calcium Carbonate) - Biological importance of Sodium, Potassium, Magnesium, and Calcium

Chemistry – Part II

Unit XI: Some p-Block Elements

Entire Chapter

General introduction to p-block elements - Group 13 elements: electronic configuration, occurrence, variation of properties, oxidation states, trends in reactivity, anomalous properties of Boron - Physical and chemical properties of Boron and some important compounds (Borax, Boric acid, Boron Hydrides) - Reactions of Aluminium with acids and alkalis, uses - Group 14 elements: electronic configuration, occurrence, variation of properties, oxidation states, trends in reactivity, anomalous behaviour of the first element (Carbon) - Carbon catenation, allotropic forms (graphite, diamond), physical and chemical properties, uses of oxides - Important compounds of Silicon and their uses (Silicon Tetrachloride, Silicones, Silicates, Zeolites)

Chemistry – Part II

Unit XIV: Environmental Chemistry

Entire Chapter

Environmental pollution (air, water, and soil) - Chemical reactions in the atmosphere - Smog, major atmospheric pollutants - Acid rain - Ozone and its reactions, effects of ozone depletion - Greenhouse effect and global warming - Pollution from industrial wastes - Green chemistry for pollution reduction - Strategies for environmental pollution control

Component

Marks

Volumetric Analysis

8

Salt Analysis

8

Content-Based Experiment

6

Project Work

4

Class Record and Viva

4

Total

30

Domain

Marks

Percentage

Remembering and Understanding

Exhibit memory of previously learned material by recalling facts, terms, basic concepts, and answers. Demonstrate understanding of facts and ideas by organising, comparing, translating, interpreting, giving descriptions, and stating main ideas

28

40%

Applying

Solve problems in new situations by applying acquired knowledge, facts, techniques, and rules in a different way.

21

30%

Analysing, Evaluating, and Creating

Examine and break information into parts by identifying motives or causes. Make inferences and find evidence to support generalisations. Present and defend opinions by making judgments about information, validity of ideas, or quality of work based on a set of criteria. Compile information together in a different way by combining elements in a new pattern or proposing alternative solutions.

21

30%

S.No.

Related Topic Pages for Class 11 Chemistry

1.

Class 11 Chemistry Periodic Table

2.

Class 11 Chemistry Redox Reactions Types

3.

Class 11 Chemistry Equilibrium Types

S.No.

Related Study Materials Links for Class 11 Chemistry

1.

CBSE Class 11 Chemistry NCERT  Books

2.

CBSE Class 11 Chemistry NCERT Solutions

3.

CBSE Class 11 Chemistry NCERT Important Questions

4.

CBSE Class 11 Chemistry NCERT Revision Notes

5.

CBSE Class 11 Chemistry Sample Papers