DELETED TOPICS OF CBSE SYLLABUS - CHEMISTRY - (2020-2021)

Hello Students,

 

CBSE has deleted many topics in almost each chapter even some chapters are completely removed from the syllabus. Here I am sharing the list of all the topics removed from Chemistry syllabus of both class XI and class XII. So that even if you following NCERT or any book you can exclude these topics, save your valuable time and score good in Examination.

Deleted Topics of Class XI

S.No.	Name of Chapter	Deleted Topics
1.	Some Basic Concepts of Chemistry	Nature of matter, laws of chemical combination, Dalton's atomic theory: concept of elements, atoms and molecules.
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
3.	Classification of Elements and Periodicity in Properties	Significance of classification, brief history of the development of periodic table,
4.	Chemical Bonding and Molecular Structure	No topic is Deleted
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)
6.	Chemical Thermodynamics	Heat capacity and specific heat capacity, Criteria for equilibrium
7.	Equilibrium	hydrolysis of salts (elementary idea), Henderson Equation
8.	Redox Reactions	applications of redox reactions
9.	Hydrogen	Preparation, properties and uses of hydrogen, hydrogen peroxide - preparation, reactionsand structure and use;
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.
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.
12.	Organic Chemistry: Some basic Principles and Techniques	methods of purification, qualitative and quantitative analysis
13.	Hydrocarbons	free radical mechanism of halogenation, combustion and pyrolysis.
14.	Environmental Chemistry	Entire chapter

Deleted Topics of Class XII Watch the Video

S.No.	Name of Chapter	Deleted Topics
1.	Solid State	Electrical and magnetic properties. Band theory of metals, conductors, semiconductors and insulators and n and p type semi conductors.
2.	Solutions	Abnormal molecular mass, Van't Hoff factor
3.	Electrochemistry	Lead accumulator, fuel cells, corrosion, law of electrolysis (elementary idea), dry cell- electrolytic cells and Galvaniccells,
4.	Chemical Kinetics	Concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.
5.	Surface Chemistry	emulsion - types of emulsions, catalysis: homogenous and heterogeneous, activity and selectivity of solid catalysts; enzyme catalysis,
6.	General Principles and Processes of Isolation of Elements	Complete chapter is deleted
7.	p-Block Elements	Preparation and properties of Phosphine, Sulphuric Acid: industrial process of manufacture, Oxides of Nitrogen (Structure only); Phosphorus - allotropic forms, compounds of Phosphorus: Preparation and properties of Halides and Oxo acids (elementary idea only).
8.	d and f Block Elements	Chemical reactivity of lanthanoids, Actinoids -Electronic configuration, oxidation states and comparison with lanthanoids. Preparation and properties of KMnO4 and K2Cr2O7
9.	Coordination Compounds	Structure and stereoisomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).
10.	Haloalkanes and Haloarenes	Uses and environmental effects of -dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.
11.	Alcohols, Phenols and Ethers	uses with special reference to methanol and ethanol.
12.	Aldehydes, Ketones and Carboxylic Acid	No topic is deleted
13.	Amines	Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.
14.	Biomolecules	Oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen), importance of carbohydrates. Vitamins– classification and functions. Enzymes. Hormones - Elementary idea excluding structure.
15.	Polymers	Complete chapter is deleted
16.	Chemistry in Everyday life	Complete chapter is deleted

 

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Manish Kumar Soni
PGT Chemistry
Kendriya Vidyalaya Sangathan