Check deleted portion of CBSE 12th Chemistry Syllabus 2020-21. The board has reduced CBSE 12th Chemistry Syllabus 2020-21 by 30%. In this article, we have provided the details of the topics which have been deleted by the Central Board of Secondary Education. Links to access other important articles and the latest CBSE Syllabus are also available here.
Learn about the deleted topics of CBSE Class 12th Chemistry Syllabus 2020-21. In this article, you will also find links to access revised CBSE 12th Chemistry Syllabus 2020-21.
Students preparing for CBSE 12th Chemistry board exam 2020-21 are advised to make a note of all the changes in latest CBSE 12th Chemistry Syllabus 2020-21.
Unit Name – Solid State
Portion Reduced – Electrical and magnetic properties. Band theory of metals, conductors, semiconductors and insulators and n and p type semi conductors.
Unit Name – Solutions
Portion Reduced – Abnormal molecular mass, Van’t Hoff factor
Unit Name – Electrochemistry
Portion Reduced – Lead accumulator, fuel cells, corrosion, law of electrolysis (elementary idea), dry cell- electrolytic cells and Galvaniccells,
Unit Name – Chemical Kinetics
Portion Reduced – Concept of collision theory (elementary idea, no mathematical treatment), activation energy, Arrhenius equation.
Unit Name – Surface Chemistry
Portion Reduced – emulsion – types of emulsions, catalysis: homogenous and heterogeneous, activity and selectivity of solid catalysts; enzyme catalysis,
Unit Name – General Principles and Processes of Isolation of Elements
Portion Reduced – Entire unit
Unit Name – p-Block Elements
Portion Reduced – 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).
Unit Name – d and f Block Elements
Portion Reduced – Chemical reactivity of lanthanoids, Actinoids -Electronic configuration, oxidation states and comparison with lanthanoids. Preparation and properties of KMnO4 and K2Cr2O7
Unit Name – Coordination Compounds
Portion Reduced – Structure and stereoisomerism, importance of coordination compounds (in qualitative analysis, extraction of metals and biological system).
Unit Name – Haloalkanes and Haloarenes
Portion Reduced – Uses and environmental effects of -dichloromethane, trichloromethane, tetrachloromethane, iodoform, freons, DDT.
Unit Name – Alcohols, Phenols and Ethers
Portion Reduced – uses with special reference to methanol and ethanol.
Unit Name – Aldehydes, Ketones and Carboxylic Acid
Portion Reduced – None
Unit Name – Amines
Portion Reduced – Diazonium salts: Preparation, chemical reactions and importance in synthetic organic chemistry.
Unit Name – Biomolecules
Portion Reduced – Oligosaccharides (sucrose, lactose, maltose), polysaccharides (starch, cellulose, glycogen), importance of carbohydrates. Vitamins– classification and functions. Enzymes. Hormones – Elementary idea excluding structure.
Unit Name – Polymers
Portion Reduced – entire chapter
Unit Name – Chemistry in Everyday life
Portion Reduced – entire chapter
Following portions should be considered deleted.
A. Surface Chemistry
a. Preparation of one lyophilic and one lyophobic sol Lyophilic sol – starch, egg albumin and gum Lyophobic sol – aluminium hydroxide, ferric hydroxide, arsenous sulphide.
b. Dialysis of sol-prepared in (a)above.
c. Study of the role of emulsifying agents in stabilizing the emulsion of different oils.
B. Chemical Kinetics
a. Effect of concentration and temperature on the rate of reaction between Sodium Thiosulphate and Hydrochloric acid.
b. Study of reaction rates of any one of the following:
i) Reaction of Iodide ion with Hydrogen Peroxide at room temperature using different concentration of Iodideions.
ii) Reaction between Potassium Iodate, (KIO3) and Sodium Sulphite: (Na2SO3)using starch solution as indicator (clock reaction).
C. Thermo chemistry
Any one of the following experiments
i) Enthalpy of dissolution of Copper Sulphate or Potassium Nitrate.
ii) Enthalpy of neutralization of strong acid (HCI) and strong base(NaOH).
iii) Determination of enthaply change during interaction (Hydrogen bond formation) between Acetone and Chloroform.
D. Electrochemistry Variation of cell potential in Zn/Zn 2+|| Cu2+/Cu with change in concentration of electrolytes (CuSO4 or ZnSO4) at room temperature.
G. Preparation of Organic Compounds Preparation of any one of the following compounds
ii) Di-benzal Acetone
Aniline yellow or 2 – Naphthol Anilinedye
CBSE Class 12 Chemistry Syllabus 2020-21 – Students must go through the prescribed CBSE syllabus for class 12 Chemistry to start preparation for theory and practical exam. CBSE class 12 Chemistry syllabus 2020-21 comprises chapters and topics to be studied to ace the exam.
Related Links for Students –
CBSE Class 12 Physics Syllabus 2020-21 and more updates
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