WBCHSE Class 11 Chemistry Syllabus 2020-21

Chemistry is an interesting subject which benefits students to learn and understand the complete chemical changes taking place in our life. Browse through West Bengal Board Class 11 Chemistry Syllabus and understand the concepts covered under the subject. Chemistry is a well-known branch of science that deals with the study of composition, structure, properties, and interaction of matter. There are different branches of chemistry such as organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, biochemistry, etc. The best way to get an overview of the topics and concepts taught in Class under the subject for the academic year is to have a look at the latest WBCHSE Class 11 Chemistry Syllabus.

WBCHSE Class 11 Chemistry Syllabus for the present academic year are designed by the subject experts on the basis of all important topics. The Class 11 Chemistry Syllabus for the present academic year includes all the necessary and important topics including classification of elements and periodicity, S block elements, Organic chemistry- basic principles and lot more.

We at BYJU’S provide the syllabus for WBCHSE Class 11 Chemistry along with the mark-wise weightage for every chapter, so that students can have a good idea about the pattern of the exam.

Download West Bengal Board Class 11 Reduced Chemistry Syllabus 2021-22

The syllabus has been reduced for the academic year 2021-22. Find the details below:

Unit wise Marking Scheme From 2021-22 Syllabus

Unit Name Marks
Unit I: Some Basic Concepts of Chemistry 04
Unit II: Structure of Atom 06
Unit III: Classification of Elements and Periodicity in properties 04
Unit IV: Chemical bonding and Molecular Structure 05
Unit V: State of Matter; Gases and Liquids 04
Unit VI: Thermodynamics 06
Unit VII: Equilibrium 06
Unit VIII: Redox Reactions 03
Unit IX: Hydrogen 03
Unit X: s-Block Elements 05
Unit XI: Some p-Block Elements 07
Unit XII: Organic Chemistry: some basic Principles and Techniques 07
Unit XIII: Hydrocarbons 10
Total 70

Students of Class 11 West Bengal Board can go through the details of the reduced Chemistry syllabus 2021-22 given below:

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 subshetls, 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, electro negativity, 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 homo nuclear diatomic molecules(qualitative idea only), Hydrogen bond.
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 4.U and 4.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).
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.
s-Block Elements: Group I 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 top -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.
Organic Chemistry: Some basic Principles and Techniques: General introduction, classification and 1 UPAC nomenclature of organic compounds. Electronic displacements in a covalent bond: inductive effect, electrometric effect, resonance and hyper conjugation. Homolytic and heteroiytic fission of a covalent bond: free radicals, carbonations, carbanions, electrophiles and nucleophiles, types of organic reactions.
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 prope11ies, 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 electrophonic substitution. Nitration, sulphonation, halogenation, Friedel Craft’s alkylation and acylation, directive inOuence of functional group in monosubstituted benzene. Carci_nogenicity and toxicity.

Meanwhile, find below the details of the deleted sections from units VII and XIII from the previous year’s syllabus.

(* Unit VII and XIII are deleted for the academic year 2020-21) 

West Bengal Board Class 11 Chemistry Reduced Practical syllabus 2020-21

  1. Volumetric Analysis                   (Marks 10)
  2. Salt Analysis                                (Marks 08)
  3. Content Based Experiments     (Marks 06)
  4. Class Record or Viva-voce or Laboratory Performance in demonstration   (Marks 06)

A. Basic Laboratory Techniques(any one)                (Marks 03)

a) Cutting glass tube and glass rod

b) Bending a glass tube

c) Boring a cork


B. Purification of Chemical Substances

Crystallisation of impure sample, any one of the following-alum, copper sulphate      (Marks 03)

C. Quantitative Estimation(any one)                             (Marks 03)

a) Preparation of standard solution of Oxalic Acid

b) Preparation of standard solution of Sodium Carbonate

D. Volumetric Analysis(any one)                                  (Marks 10)

a) Determination of strength of a given solution of Sodium Hydroxide by titrating it against standard Oxalic Acid solution

b) Determination of strength of a given solution of Hydrochloric acid by titrating it against standard Sodium Carbonate solution

E. Qualitative Analysis                                                            (Marks 08)

Determination of one Anion and one Cation in a given salt:

F. Class Record or Laboratory Performance in demonstration                   (Marks 03)

G. Viva-voce                                                    (Marks 03)

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