CBSE Class 12 Chemistry Deleted Syllabus Portion for 2020-21

CBSE Class 12 Chemistry Deleted Syllabus Portion for 2020-21

CBSE Class 12 Chemistry Syllabus 2020-21 pdf download

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.

CBSE Class 12 Chemistry Deleted Syllabus Portion for 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.

CBSE Class 12 Syllabus 2020-21 (Reduced): All Subjects

CBSE Class 12 Chemistry Deleted Syllabus Portion for 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

i) Acetanilide

ii) Di-benzal Acetone

iii) p-Nitroacetanilide

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

CBSE class 11 syllabus 2020-21

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