Science steam class 11 syllabus 2020-21

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Science steam chemistry 

course structure class - XI 

(Theory 2020-2021)

UNIT NO	TITLE	NO OF PERIODS	MARKS
Unit 1	Some basic concept of chemistry	10	UNIT 1 & UNIT 2  TOTAL IS 11
Unit2	Structure of Atom	12
Unit 3	Classification of elements & periodicity in properties	06	04
Unit 4	Chemical bonding & molecular structure	14	UNIT 4 , 5,6,7 TOTAL IS 21
Unit 5	States of matter	09
Unit 6	Chemical thermodynamics	14
Unit 7	Equilibrium	12
Unit 8	Redox Reaction	04	UNIT 8,9,10,11 TOTAL IS 16
Unit 9	Hydrogen	04
Unit 10	s- block elements	05
Unit 11	Some p-block elements	09
Unit 12	Organic chemistry	10	UNIT 12 , 13 TOTAL IS 18
Unit13	hydrogen	10
	TOTAL	119	70

Unit 1

Some Basic Concepts of Chemistry 10 Periods 

General Introduction: Importance and Scope of Chemistry.

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 

12 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 sp and d orbitals, rules for filling electrons in orbitals - Aufbau principle, 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 

6 Periods

Modern periodic law and the present form of periodic table, periodic trends in properties of elements -atomic radii, ionic radil, 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 band, 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 sp and d orbitals and shapes of some simple molecules, molecular orbital theory of homonuclear diatomic molecules qualitative idea only), Hydrogen bond.

Unit V: States of Matter: Gases and Liquids 9 Periods 

Three states of matter, intermolecular interactions, types of bonding, melting and boiling points, role of gas laws in elucidating the concept of the molecule, Boyle's law, Charles law, Gay Lussac's law  , Avogadro's law, ideal behavior, empirical derivation of gas equation, Avogadro's number, ideal gas equation and deviation from ideal behavior.

Unit VI: Chemical Thermodynamics 14 Periods

Concepts of System and types of systems, surroundings, work, heat, energy, extensive and intensive properties, state functions.  First law of thermodynamics -internal energy and enthalpy, measurement of AU and AH, 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.  Third law of thermodynamics (brief introduction)

Unit Vll: Equilibrium 12 Periods 

Equilibrium in physical and chemical processes, dynamic nature of equilibrium, law of mass action, equilibrium constant, factors affecting equilibrium 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, buffer solution, solubility product, common ion effect (with illustrative examples).

Unit VIII: Redox Reactions 04 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.

Unit lX: Hydrogen 04 Periods 

Position of hydrogen in periodic table, incident, isotopes, hydrides - lonic covalent and interstitial;  physical and chemical properties of water, heavy water, hydrogen as a fuel.

Unit X: s - Block Elements (Alkali and Alkaline Earth Metals) 5 Period 

Group 1 and Group 2 Elements General introduction, electronic configuration, incident, anomalous properties of the first element of each group, diagonal relationship, trends in the variation of properties (  such as ionization enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and halogens, uses.

Unit XI: Some p - Block Elements 9 Periods 

General Introduction to p - Block Elements Group 13 Elements: General Introduction, electronic configuration, affecting, variation of properties, oxidation states, trends in chemical reactivity, anomalous properties of first element of the group,  Boron - physical and chemical properties.  14 Elements: General introduction, electronic configuration, proceeding, variation of properties, oxidation oxidation states, trends in chemical reactivity, anomalous behavior of first elements, carbon - catenation, allotropic forms, physical and chemical properties 

Unit Xll: Organic Chemistry - Some Basic Principles  and Techniques 10 Periods 

General Introduction, 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.  Group 

Unit XIII: Hydrocarbons 10 Periods 

Classification of Hydrocarbons Aliphatic Hydrocarbons: 

Alkanes - Nomenclature, isomerism, conformation (ethane only), physical properties, chemical reactions.

 Alkenes Nomenclature, structure of double bond (ethene) geometrical isomerism, physical properties, methods of  preparation, chemical reactions addition of hydrogen, halogen, water, hydrogen halides (Markovnikov's addition and peroxide effect), ozanolysis, oxidation, mechanism of electrophilic addition 

Alkynes - 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 effect of functional group in monosubstituted benzene.  Carcinogenicity and toxicity.

practicals 

Evaluation Scheme for Examination	marks
Volumetric Analysis	08
Salt Analysis	08
Control based Experiment	06
Project	04
Class record & viva	04