WBBSE Class 11 Chemistry Syllabus 2024-25: Download FREE PDF

UNIT

No.

TOPICS

CONTACT HOURS

MARKS

Unit - 1

Some Basic Concepts of Chemistry:

Laws of chemical combination. 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.  Different

concentration terms of solutions and related calculations.

07

03

Unit - 2

Structure of Atom:

Bohr’s model and its limitations, concept of shell and sub-shells, the dual nature of matter and light, de Broglie’s relationship. Heisenberg uncertainty principle, Schrödinger wave equation (elementary idea only). Concept of orbitals, quantum numbers, shapes of s, p and d orbitals, rules for filling electrons in orbitals: Aufbau principle, Pauli exclusion principle and Hund’s rule, exchange energy, electronic configuration of atom, stability of half-filled,

completely filled orbitals.

12

06

Unit - 3

Classification of Elements and Periodicity in Properties:

Modern periodic law and the present form of the periodic table, periodic trends in properties of elements – atomic radii, ionic radii, van der Waals’ radii, ionization enthalpy, electron gain enthalpy, electronegativity, valency. Nomenclature of elements with atomic number greater than 100.

07

04

Unit - 4

Chemical Bonding and Molecular Structure:

Valence electrons, ionic bond, bond parameters, covalent bond, Lewis structure, polar character of covalent bond, covalent character of ionic bond, valence bond theory, resonance, geometry of covalent molecules, VSEPR theory, concept of hybridisation, involving s, p and d orbitals and shapes of some simple molecules, intermolecular interactions, Hydrogen bonding, Molecular orbital theory of homonuclear diatomic molecules (H₂, He₂, O₂, N₂, F₂ – qualitative idea only)

13

06

UNIT

No.

TOPICS

CONTACT HOURS

MARKS

Unit - 5

States of Matter — Solids and Gases:

Classification of solids (elementary idea): molecular, ionic, covalent and metallic solids, amorphous and crystalline solids (elementary idea), unit cell in two-dimensional and three-dimensional lattices, packing efficiency, calculation of density of unit cell, packing in solids, voids, number of atoms per unit cell in a cubic unit cell, point defects.

Kinetic theory of gas, molecular speeds, Dalton’s law of partial pressure, Graham’s law, deviation of ideal behaviour and van der Waals’ equation,

Liquefaction of gases, critical temperature.

09

04

Unit - 6

s-Block Elements (Group 1 and Group 2 elements):

Electronic configuration, occurrence, trends in the variation of properties (such as ionization enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and halogens, hydrides (ionic, covalent and interstitial), hydrogen peroxide (preparation, properties, structure & use.),

hydrogen as a fuel. Biological importance of Na, K, Mg, Ca.

10

05

Unit - 7

p-Block Elements (Group 13 and Group 14 elements):

General introduction to p-block elements, electronic configuration, occurrence, variation in properties, oxidation states, and trends in chemical reactivity of group 13 and 14 elements.

Group 13: Boron: physical and chemical properties of compounds of Boron: Boron oxides, boric acid, borates and B₂H₆

Aluminium: Reactions of Al with acid and alkali, uses of Al, Preparation and uses of LiAlH₄ and Al₂O₃.

Group 14: Carbon: catenation, allotropic forms, nano carbon, graphene, physical and chemical properties of two oxides of carbon- CO and CO₂, Silicon: some compounds of silicon and their important uses –

Silicon tetrachloride (Structure, preparation, hydrolysis and reduction reaction

only), silicates [structure of open chain silicates constructing of (SiO3)^2n–

n

ions], use of zeolites,

12

07

UNIT

No.

TOPICS

CONTACT HOURS

MARKS

Unit - 1

Thermodynamics:

Concepts of system (including types of system), surroundings. Work, heat, energy, extensive and intensive properties, state function, Zeroth law of thermodynamics and definition of temperature. The first law of thermodynamics – internal energy change (∆U) and enthalpy change (∆H), Enthalpy of bond dissociation, combustion, formation, atomization, ionization, solution and sublimation. Transformation of state. Hess’s law of constant heat summation, Born Haber Cycle and its application. 2^nd law of thermodynamics, the introduction of entropy as a state function, Gibbs energy change for

spontaneous and non-spontaneous processes, criteria for equilibrium.

12

07

Unit - 2

Equilibrium:

Equilibrium in physical and chemical processes, dynamic nature of equilibrium, law of mass reaction, equilibrium constant, factors affecting equilibrium – Le Chatelier’s principle; ionic equilibrium, ionization of acids and bases, strong and weak electrolytes, degree of ionization of polybasic acids, acid strength, concept of pH Henderson Equation. Hydrolysis of salts (elementary idea). Buffer solutions, solubility product, common ion effect (with illustrative

examples).

10

06

Unit - 3

Redox Reactions:

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 in permanganometry and

dichromatometry

05

03

Unit - 4

Organic Chemistry: Some basic principles:

General introduction, classification and IUPAC nomenclature of organic compounds.

Electronic displacements in a covalent bond: inductive effect, resonance and hyperconjugation. Homolytic and Heterolytic fission of a covalent bond: free radicals, carbocations, carbanions electrophiles and nucleophiles, types of organic reactions. Elementary idea of addition, elimination and substitution

reactions.

12

07

UNIT

No.

TOPICS

CONTACT HOURS

MARKS

Unit - 5

Hydrocarbons: Classification of hydrocarbons

Alkanes – Nomenclature, isomerism, conformations (ethane only), physical properties (up to 6 carbons) and chemical reactions including halogenations, free radical mechanism, combustion and pyrolysis.

Alkenes – Nomenclature, structure of double bond (ethene), geometrical isomerism, physical properties (up to 3 carbons) methods of preparation; chemical reactions; addition of hydrogen, halogen, water hydrogen halides (Markovnikov’s addition and peroxide effect), ozonolysis, oxidation, mechanism of electrophilic addition.

Alkynes – Nomenclature, structure of triple bond (ethyne), physical properties (up to 3 carbons) 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, halogenations, Friedel-Crafts alkylation

and acylation, carcinogenicity and toxicity.

14

08

Unit - 6

Environmental Chemistry:

Environmental pollution – air, water and soil pollution (cause and effects), Primary and secondary pollutants (solid and liquid), chemical reactions in the atmosphere, smog, pollution due to industrial wastes; solid waste management (elementary idea only), SPM, RSPM, green chemistry as an alternative tool for reducing pollution. Water preservation and protection,

Strategy for control of environmental pollution.

07

04