CBSE Syllabus For Chemistry Class 11 | Deleted Syllabus | New Syllabus | Detailed Full New Syllabus | Deleted Portions of Chemistry Class 11 Session 2020-21

Revised CBSE Syllabus For Class 11 Chemistry 2020-2021: 

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Deleted Portions/Topics of Chemistry Class 11

 

Unit 1 : Some Basic Concepts of Chemistry 

Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules. 

Unit 2 : Structure of Atom 

Discovery of Electron, Proton and Neutron, atomic number, isotopes and isobars. Thomson's model and its limitations , Rutherford's model and its limitations 

Unit 3 : Classification of Elements and Periodicity in Properties 

Significance of classification, brief history of the development of periodic table.

Unit 4 : Chemical Bonding and Molecular Structure 

-- (Nothing Deleted)

Unit 5 : States of Matter: Gases and Liquids 

liquefaction of gases, critical temperature, kinetic energy and molecular speeds (elementary idea), Liquid State- vapour pressure, viscosity and surface tension (qualitative idea only, no mathematical derivations) 

Unit 6 : Chemical Thermodynamics 

Heat capacity and specific heat capacity, Criteria for equilibrium 

Unit 7 : Equilibrium

hydrolysis of salts (elementary idea), Henderson Equation 

Unit 8 : Redox Reactions

Applications of redox reactions 

Unit 9 : Hydrogen

Preparation, properties and uses of hydrogen, hydrogen peroxide -preparation, reactionsand structure and use; 

Unit 10 : s -Block Elements

Preparation and Properties of Some Important Compounds: Sodium Carbonate, Sodium Chloride, Sodium Hydroxide and Sodium Hydrogen carbonate, Biological importance of Sodium and Potassium. Calcium Oxide and Calcium Carbonate and their industrial uses, biological importance of Magnesium and Calcium. 

Unit 11 : Some p -Block Elements 

Some important compounds: Borax, Boric acid, Boron Hydrides, Aluminium: Reactions with acids and alkalies, uses.

Carbon: uses of some important compounds: oxides. Important compounds of Silicon and a few uses: Silicon Tetrachloride, Silicones, Silicates and Zeolites, their uses. 

Unit 12 : Organic Chemistry: Some basic Principles and Techniques 

methods of purification, qualitative and quantitative analysis 

Unit 13 : Hydrocarbons

Free radical mechanism of halogenation, combustion and pyrolysis. 

Unit 14 : Environmental Chemistry 

Entire chapter Deleted.

Practical 

The following portion to be deleted 

C. Experiments based onpH 

a) Any one of the following experiments: 

● Determination of pH of some solutions obtained from fruit juices, solution of known and 

varied concentrations of acids, bases and salts using pH paper or universal indicator. 

● Comparing the pH of solutions of strong and weak acids of same concentration. 

● Study the pH change in the titration of a strong base using universal indicator. 

b) Study the pH change by common-ion in case of weak acids and weak bases. 

D. Chemical Equilibrium 

One of the following experiments: 

a) Study the shift in equilibrium between ferric ions and thiocyanate ions by increasing/decreasing 

the concentration of either of theions. 

b) Study the shift in equilibrium between [Co(H2O)6]2+ and chloride ions by changing the 

concentration of either of the ions.

Revised CBSE Syllabus For Class 11 Chemistry 2020-2021

Chemistry is an important subject for CBSE Science Stream. It is an essential subject for those students who want to pursue Chemical engineering or medical degree.

HRD Minister Ramesh Nishank announced a major CBSE syllabus reduction with 30% of the syllabus slashed for the year 2020-21 on July 7 which was soon followed by an official notification by CBSE on the same.

You should have a clear concept in CBSE Class 12 Chemistry to score better grades in the 12th CBSE Board exam. You should have a depth concept on Class 11 and Class 12 Chemistry to score better marks in the various entrance exam.

With a better concept on the latest syllabus, you can secure good marks.

You already know CBSE updates its syllabus almost every year to provide the students the latest syllabus.

Here you can check CBSE new syllabus for Class 11 Chemistry and NCERT Textbook based on the latest syllabus

New latest Syllabus of Chemistry Class 11

Unit  I : Some Basic ConceptsofChemistry       

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

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.

Unit III : 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.

Unit IV : 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.

Unit V : 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 behavior.

Unit VI : 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 ΔU and ΔH, 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 VII : 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).

Unit VIII : 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.

Unit IX : 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.

Unit X : s‐Block Elements (Alkali and Alkaline Earth Metals)

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.

Unit XI : 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.

Unit XII : Organic Chemistry ‐Some Basic Principles and Techniques

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

Unit XIII : 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 electrophilicaddition.

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.

PRACTICAL SYLLABUS 

Micro‐chemical methods are available for several of the practical experiments, wherever possible such techniques should be used.

A. Basic Laboratory Techniques

1. Cutting glass tube and glassrod

2. Bending a glasstube

3. Drawing out a glassjet

4. Boring a cork

B. Characterization and Purification of Chemical Substances

1. Determination of melting point of an organiccompound.

2. Determination of boiling point of an organiccompound.

3. Crystallization of impure sample of any one of the following: Alum, Copper Sulphate, BenzoicAcid.

C. Quantitative Estimation

i. Using a mechanical balance/electronicbalance.

ii. Preparation of standard solution of Oxalicacid.

iii. Determination of strength of a given solution of Sodium hydroxide by titrating it against

standard solution of Oxalicacid.

iv. Preparation of standard solution of Sodiumcarbonate.

v. Determination of strength of a given solution of hydrochloric acid by titrating it against

standard Sodium Carbonatesolution.

D. Qualitative Analysis 

a) Determination of one anion and one cation in a given salt

Cations‐ Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+, Ni2+, Zn2+, Co2+, Ca2+, Sr2+, Ba2+, Mg2+, NH +

Anions – (CO3)2‐, S2‐, NO2‐ , SO32‐, SO2‐ , NO ‐ , Cl‐ , Br‐, I‐, PO43‐ , C2O2‐    ,CH3COO‐

(Note: Insoluble salts excluded)

b) Detection of ‐Nitrogen, Sulphur, Chlorine in organic compounds.

c) PROJECTS

Scientific investigations involving laboratory testing and collecting information from other sources.

A few suggested Projects

• Checking the bacterial contamination in drinking water by testing sulphideion

• Study of the methods of purification ofwater

• Testing the hardness, presence of Iron, Fluoride, Chloride, etc., depending upon the regional variation in drinking water and study of causes of presence of these ions above permissible limit (if any).

• Investigation of the foaming capacity of different washing soaps and the effect of addition of Sodium carbonate on it.

• Study the acidity of different samples of tea leaves.

• Determination of the rate of evaporation of different liquids

• Study the effect of acids and bases on the tensile strength of fibers.

• Study of acidity of fruit and vegetable juices.

Note: Any other investigatory project, which involves about 10 periods of work, can be chosen with the approval of the teacher.

Practical Examination for Visually Impaired Students

Class XI

Note: Same Evaluation scheme and general guidelines for visually impaired students as given for Class XII may be followed.

A. List of apparatus for identification for assessment in practicals (All experiments)

Beaker, tripod stand, wire gauze, glass rod, funnel, filter paper, Bunsen burner, test tube, test tube stand,dropper, test tube holder, ignition tube, china dish, tongs, standard flask, pipette, burette, conical flask, clamp stand, dropper, wash bottle

• Odour detection in qualitative analysis

• Procedure/Setup of the  apparatus

B. List of Experiments

A. Characterization and Purification of Chemical Substances

           1. Crystallization of an impure sample of any one of the following: copper sulphate, benzoicacid

B. Experiments based on pH

            1. Determination of pH of some solutions obtained from fruit juices, solutions of known and varied concentrations of acids, bases and salts using pH paper

            2. Comparing the pH of solutions of strong and weak acids of same concentration.

C. Quantitative estimation

            1. Preparation of standard solution of oxalic acid.

            2. Determination of molarity of a given solution of sodium hydroxide by titrating it against standard solution of oxalic acid.

D. Qualitative Analysis

            1. Determination of one anion and one cation in a given salt

            2. Cations ‐NH+4 

                Anions – (CO3)2‐, S2‐, (SO3)2‐, Cl‐, CH3COO‐

                (Note: insoluble salts excluded)

            3. Detection of Nitrogen in the given organic compound.

            4. Detection of Halogen in the given organic compound.

Note : The above practicals may be carried out in an experiential manner rather than recording observations.

Prescribed Books:

1. Chemistry Part – I, Class‐XI, Published by NCERT.

2. Chemistry Part – II, Class‐XI, Published by NCERT.