Chemistry - Jun 2012
First Year Engineering (Semester 1)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1(a) Define corrosion.Write difference between Dry & wet corrosion. (7 marks) 1(b) Discuss soda-lime process.(3 marks) 1(c) Explain reverse osmosis in detail(4 marks) 2(a) What are constituents of paint?Give examples & write their fuctions.(7 marks) 2(b) Give process & advantages of electroless plating. (3 marks) 2(c) Write differences between temporary & permanent hardness. (4 marks) 3(a) Write a note on special paints.(3 marks) 3(b) What is a refractory? Give different types of refractories. (4 marks) 3(c) Discuss galvanizing & Tinning.(7 marks) 4(a) Define:flash point, fire point, pour point, cloud point(4 marks) 4(b) What is ozone depletion? (3 marks) 4(c) What is air pollution? What are the factors res ponsible? Explain role of fuel in air pollution? (7 marks) 5(a) Define polymer. What is degree of polymerization? (3 marks) 5(b) Discuss factors affecting corrosion(4 marks) 5(c) What are metallic coating?Expalin methos of cleaning base metal before electoroplating. (7 marks) 6(a) Explain: What is sand blasting? (3 marks) 6(b) Write a note on Portland cement.(4 marks) 6(c) Discuss manufacture of ethyl alcohol from molases by fermentation(7 marks) 7(a) What is chromatography?What are the types?Expla in paper chromatograph(7 marks) 7(b) Draw instrumentation of UV-specroscopy(3 marks) 7(c) Discuss melt spinning of fibres.(4 marks)