Central Board of Secondary Education (CBSE) Has Announced that the Examinations from IX th to XIIth taken by dividing the Syllabus into two Parts Term I and Term II. CBSE also released the Syllabus and marking pattern of each chapter of Chemistry of Class 11th. In the Fisrt Term there are Seven Units and Six Units in Term Second. These are listed Below with Marks of Each Unit.
CLASS XI Term-I
| Sr. No. |
UNIT |
Marks |
| 1 |
Some Basic Concepts of Chemistry and Structure of Atom |
11 |
| 2 |
Classification of Elements and Periodicity in Properties |
04 |
| 3 |
Chemical Bonding and Molecular Structure |
06 |
| 4 |
Redox Reactions and Hydrogen |
05 |
| 5 |
Organic Chemistry: Some basic Principles and Techniques |
09 |
|
Total |
35 |
CLASS XI Term-I Syllabus In Details
| Some Basic Concepts of Chemistry |
| 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. |
| Structure of Atom |
| 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, p 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 |
| Classification of Elements and Periodicity in Properties |
| Modern periodic law and the present form
of periodic table, periodic trends in properties of elements -atomic radii, ionic radii, inert gas radii,
Ionization enthalpy, electron gain enthalpy, electronegativity, valency. Nomenclature of elements
with atomic number greater than 100.
|
| Chemical Bonding and Molecular Structure |
| 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.
|
| 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. |
| Hydrogen |
| Position of hydrogen in periodic table, occurrence, isotopes, hydrides-ionic covalent and
interstitial; physical and chemical properties of water, heavy water, hydrogen as a fuel |
| Organic Chemistry: Some basic Principles and Techniques |
| 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. |
| PRACTICALS |
| Term I: A 15-mark Practical would be conducted under the supervision of subject teacher. This
would contribute to the overall practical marks for the subject.
|
CLASS XI Term-II
| Sr. No. |
UNIT |
Marks |
| 1 |
States of Matter: Gases and Liquids
Chemical Thermodynamics
Equilibrium |
15 |
| 2 |
s -Block Elements Some p -Block Elements |
11 |
| 3 |
Hydrocarbons |
09 |
|
Total |
35 |
CLASS XI Term-II Syllabus In Details
| States of Matter: Gases and Liquids |
| 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 behaviour, empirical derivation of
gas equation, Avogadro's number, ideal gas equation and deviation from ideal behaviour. |
| Chemical Thermodynamics |
| 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 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 nonspontaneous processes.
Third law of thermodynamics (brief introduction). |
| Equilibrium |
| Equilibrium in physical and chemical processes, 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, buffer solution, solubility product,
common ion effect (with illustrative examples).
|
| s -Block Elements |
| Group 1 and Group 2 Elements -General introduction, electronic configuration,
occurrence, 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.
|
| Some p -Block Elements |
| General Introduction to p -Block Elements
Group 13 Elements: General introduction, electronic configuration, occurrence, variation of
properties, oxidation states, trends in chemical reactivity, anomalous properties of first element of
the group, Boron - physical and chemical properties.
Group 14 Elements: General introduction, electronic configuration, occurrence, variation of
properties, oxidation states, trends in chemical reactivity, anomalous behaviour of first elements.
Carbon-catenation, allotropic forms, physical and chemical properties.
|
| Hydrocarbons |
| 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), ozonolysis, 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 influence of functional group in monosubstituted
benzene. Carcinogenicity and toxicity.
|
| PRACTICALS |
| At the end of Term II, a 15-mark Practical would be conducted under the supervision of
subject teacher. This would contribute to the overall practical marks for the subject. |
Ncert Book Class 1
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