Punjab Board PSEB Class 11 Chemistry Syllabus 2025-26, Download FREE PDF

Board Name

Punjab School Education Board (PSEB)

Class

11

Subject

Chemistry

Total Marks

100

Theory Marks

70

Practical Marks

25

Internal Assessment

05

Paper Duration

3 Hours

Unit I: Some Basic Concepts of Chemistry 12 Periods 

• General Introduction: Importance and scope of chemistry. 

• Development 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 and molar mass, percentage composition, empirical and molecular formula, chemical reactions, stoichiometry and calculations based on stoichiometry. 

Unit II: Structure of Atom 14 Periods 

Bohr's model and its limitations, concept of shells and subshells, dual nature of matter and light, de Broglie's relationship, Heisenberg uncertainty principle, concept of orbitals, quantum numbers, shapes of s, Pauli's exclusion principle and Hund's rule, electronic configuration of atoms, stability of half-filled and completely filled orbitals.  

Unit III: Classification of Elements and Periodicity in Properties 8 Periods 

Modern periodic law and the present form of periodic table, periodic trends in properties of elements-atomic radii, ionic, inert gas radii, ionization enthalpy, electron gain enthalpy, electronegativity, valency. Nomenclature of elements with atomic number greater than 100

Unit IV: Chemical Bonding and Molecular Structure 14 Periods 

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, concept of hybridization, involving s, p and d orbitals and shapes of some simple molecules, molecular orbital theory of homonuclear diatomic molecules (qualitative idea only), hydrogen bond.

Unit V: Chemical Thermodynamics 16 Periods

Concepts of System and types of systems, surroundings, work, 2025-26 heat, energy, extensive and intensive properties, state functions. First law of Thermodynamics internal energy and enthalpy, heat capacity and specific heat, measurement of <U and <H, Hess's law of constant heat summation, enthalpy of bond dissociation, combustion, formation, atomization, sublimation, phase transition, ionization, solution and dilution. Second law of Thermodynamics (brief introduction). Introduction of entropy as a state function, Gibb's energy change for spontaneous and non-spontaneous processes, criteria for Equilibrium. Third law of thermodynamics (brief introduction).

Unit-VI: Equilibrium 14 Periods 

Equilibrium in physical and chemical process, dynamic nature of equilibrium, law of mass action, equilibrium constant, factors affecting equilibrium-Le Chatelier's principle, ionic equilibrium-ionization of acids and bases, strong and weak electrolytes, degree of ionization, ionization of poly basic acids, acid strength, concept of pH, Henderson Equation, hydrolysis of salts (elementary idea), buffer solution, solubility product, common hydrolysis of salts (elementary idea), buffer solution, solubility product, common ion effect (with illustrative examples).

Unit VII: Redox Reactions 06 Periods 

Concept of oxidation and reduction, redox reactions, oxidation number, balancing redox reactions, in terms of loss and gain of electrons and change in oxidation number, applications of redox reactions.

Unit VIII: Organic Chemistry-Some Basic Principles and Techniques 14 Periods 

General introduction, methods of purification, qualitative and quantitative analysis, classification and IUPAC nomenclature of organic compounds. Electronic displacements in a covalent bond: inductive effect, electromeric effect, resonance and hyper conjugation. Homolytic and heterolytic fission of a covalent bond: free radicals, carbocations, carbanions, electrophiles and nucleophiles, types of organic reactions.

Unit IX: Hydrocarbons 12 Periods 

Classification of Hydrocarbons Aliphatic Hydrocarbons: 

• Alanes-Nomenclature, isomerism, conformation (ethane only), physical properties, chemical reactions including free radical mechanism of halogenation, combustion and pyrolysis. 

• Alkenes-Nomenclature, structure of double bond (ethane), geometrical isomerism, physical properties, methods of preparation, chemical reactions: addition of hydrogen, halogen, water, hydrogen halides (Markownikov's addition and peroxide effect), ozonolysis, oxidation, mechanism of electrophilic addition. 

• Alynes-Nomenclature, structure of triple bond (ethyne), physical properties, methods of preparation, chemical reactions: acidic character of alkynes, addition reaction of -hydrogen, halogens, hydrogen halides and water. Aromatic Hydrocarbons: Introduction, IUPAC nomenclature, benzene: resonance, aromaticity, chemical properties: mechanism of electrophilic substitution. 

• Nitration, sulphonation, halogenation, Friedel Craft's alkylation and acylation, directive influence of functional group in monosubstituted benzene. Carcinogenicity and toxicity.

Evaluation Scheme for Examination

Marks

Volumetric Analysis

07

Salt analysis

07

Content Based Experiment

05

Project Work

03

Class record and viva

03

Total 

25