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CBSE Class 12 Chemistry Deleted Syllabus Portion for 2020-21

Class -XII S No Unit Portion to be Reduced 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.

15 Polymers entire chapter 16 Chemistryin Everydaylife entire chapter Practical 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.

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