Engineering FE Engineering Common Sem 2 Engineering Chemistry II May 2019 R16 Question Paper - Mumbai University | munotes

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Q2 Attempt any three questions out of remaining five 3.Figure to the right indicates full marks 1 Answer any five from the following 15
- (a) Define octane number and write its significance
- (b) What is the difference between anodic and cathodic coatings?
- (c) Calculate higher calorific value of a coal sample containing C=85% H=1% N=1.5% O=5% and remaining being ash
- (d) Write the composition, properties and uses of commercial brass
- (e) Explain the principle “Inherently Safer Chemistry of Accident Prevention” in green
- (f) Write the classification of composite materials
- (g) What are functions of pigments in paints? 2 (a) Define corrosion. Explain the mechanism of wet corrosion with respect to neutral and 6
- (b)i) of coal sample on combustion gave 0.3 gm of barium sulphate precipitate. 3 Calculate the percentage of sulphur in the sample
- ii) What are the industrial applications of super critical CO2? 2
- (c). What are large particle reinforced composite materials? Explain with the help of examples. 4 3 (a) What is cracking? Explain in detail fixed bed catalytic cracking. 6
- (b)i) What are shape memory alloys ?What are their applications ? 3
Q11 How does the presence of humidity affect the rate of corrosion? 2 marks
- (c) Calculate the percentage atom economy of the following reaction with respect to the 4 (a) What is anodic protection method of corrosion control? Explain with the help of a neat 6
- (b)i) What are the industrial applications of the products from natural materials ? 3
- ii) What are the functions of matrix phase of composite materials? 2
- (c) Write a note on heat resisting steel. 4 5 (a) A sample of coal was found to contain C=90% and remaining being 6 nitrogen.Calculate weight and volume of air required for complete combustion of | kg of coal sample.(M.W.of air=28.949)
- (b)i) “The noble metals do not undergo corrosion” .Justify the statement. 3
- ii) What are the applications of fuel cell? 2
- (c) Explain with suitable equations ,conventional and green synthesis of adipic acid. 4 6 (a) What is powder metallurgy? Explain powder injection moulding method with the help of a 6
- (b)i) What are the characteristics of composite materials ? 3 it) What are the characteristics of a paint film? 2
- (c) What is biodiesel? Write the advantages of biodiesel. 4

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