January 28, 2014

Senior Inter Chemistry Weightage Analysis - Surface Chemistry, Metallurgy and Electro Chemistry

Electro Chemistry: Probable weightage of the lesson "Electro Chemistry and Chemical Kinetics" is 2 + 8 = 10
marks. From Electro Chemistry learn examples in boxes: 3.1, 3.2, 3.3, 3.7, 3.8, 3.10, Intext questions 3.6, 3.10, 3.23, Chapter end questions 4, 5, 6, 8, 13, 14, 23, 53, 54, 55, 63. Products formed during electrolysis of fused or aqueous electrolytes are important for 2 marks. Faraday's laws (statements & problems), Kohlrausch law & problems, Example in Box: 3.20, chapter end questions: 33, 40, 48, Nernst equation & problems are very important for 4 marks.

From "Chemical Kinetics" learn chapter end questions: 17, 19, 24, 48 and 53 for 2 marks. Order & Molecularity (definition, differences, examples of 0, 1st, 2nd order), Factors influencing rate of reaction are important for 4
marks. Collision theory of reaction rates is given previously for 8 marks.

Surface Chemistry

One 4 marks or two 2 marks questions are coming from the lesson "Surface Chemistry". Hardy Schulze rule, Brownian movement, Tyndall effect, promoters, poisons in catalysis, Electrophoresis, Coagulation, Gold number, Adsorbate, Adsorbent, dispersed phase, dispersion medium (identification in fog, smoke, milk, blood, etc) are very important
for 2 marks.

Emulsions, Catalysis (definitions, types, examples), physical adsorption & chemical adsorption (definition, differences, examples,) micelle & cleaning action of soap, Freundlinch adsorption isotherm, Lyophilic & Lyophobic colloids are very important for 4 marks.

General Principles of Metallurgy

One 2 marks, one 4 mark questions from "General principles of metallurgy" are given in the model paper.
Learn composition of brass and german silver, poling, zone refining, flux, matte, blister copper, gangue, slag, role of cryolite in the extraction of Al, difference between cast iron and pig iron for 2 marks.

Froth flotation, roasting, calcination, extraction of Cu, Al, Fe, ellingham diagram, limitations, applications, working of blast furnace are important for 4 marks.

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