Question: Engineering Chemistry : Dec 2013 - First Year Engineering (Set A) (Semester 1) | Rajiv Gandhi Proudyogiki Vishwavidyalaya (RGPV)

Engineering Chemistry - Dec 2013

First Year Engineering (Set A) (Semester 1)

(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.

Answer any one question from 1 & 2

1 (a) Define softening of water. Describe the Zeolite method of softening of hard water with the help of neat and labelled diagram.(6 marks) 1 (b) What is boiler corrosion. Discuss its causes?(4 marks) 1 (c) Write short note on any two-
i) Caustic embrittlement
ii) Chlorination
iii) CaCO3 equivalent
(4 marks)
10 (a) Define spectroscopy discuss the principle and working of NMR spectroscopy.(6 marks) 10 (b) Write short note on application of UV spectroscopy.(4 marks) 10 (c) Write short note on any two-
i) Stretching and Bending vibrations
ii) Chromophores
iii) Significance of IR spectroscopy
(4 marks)
2 (a) Define hardness of water. Discuss the internal treatment method of water softening.(6 marks) 2 (b) What is Boiler Trouble? Explain the causes of scale formation.(4 marks) 2 (c) A sample of water on analysis was found to contain the fllowing Ca(HCO3)2 = 4 mg/l, Mg(HCO3)2= 6 mg/l, CaSO4 = 8 mg/l, MgSO4 = 10 mg/l. Calculate the temporary, permanent and total hardness of water in ppm, °Cl and °Fr.(4 marks)

Answer any one question from 3 & 4

3 (a) Define calorific value. How it is determine by bomb calorimeter?(6 marks) 3 (b) Discuss the parameters of ultimate analysis of coal?(4 marks) 3 (c) Write short note on any two-
i) Anti knock compound
ii) Octane No
iii) Carbanization
(4 marks)
4 (a) Describe the Otto-Hoffmann's method for the manufacture of coke. Write the recovery of by products.(7 marks) 4 (b) On burning 0.83 g of a solid fuel in a bomb calorimeter, the temperature of 3500g of water increases from 26.5° C to 29.2° C. Water equivalent of calorimeter and latent heat of steam are 385g and 587 cal/g respectively. If the fuel contains 0.7% hydrogen, calculate its gross and net calorific value?(7 marks)

Answer any one question from 5 & 6

5 (a) Define lubricant. Discuss the classification of lubricants.(6 marks) 5 (b) Write short note on any two:
i) Saponification value
ii) Thermal spalling
iii) Blended oil
(4 marks)
5 (c) Explain cement manufacture by wet process.(4 marks) 6 (a) Define lubrication. Describe hydrodynamic mechanism of lubrication.(6 marks) 6 (b) What are refractories. Describe the properties of refractories.(4 marks) 6 (c) An oil sample under test has a Saybolt universal viscosity same as that of Standard Gulf oil (low viscosity standard) and Pennsylvanian oil (high viscosity index standard) at 100°F are 61758 and 420 respectively. Calculate viscosity index of the sample oil.(4 marks)

Answer any one question from 7 & 8

7 (a) Define polymerisation. Explain free radicals mechanism of polymerisation.(6 marks) 7 (b) Write preparation, properties and uses of buna-N.(4 marks) 7 (c) Explain condensation polymerisation with two examples.(4 marks) 8 (a) Discuss the classification of polymers on the basis of molecular forces.(6 marks) 8 (b) Explain polyvinyl chloride is stronger and tougher than polyethylene.(4 marks) 8 (c) Write short note on any two-
i) Vulcanisation
ii) Phenolic Resin
iii) Nylon-6,6
(4 marks)

Answer any one question from 9 & 10

9 (a) Discuss in brief the type of molecular vibrations.(6 marks) 9 (b) Explain Gas Liquid Chromatography.(4 marks) 9 (c) Write short note on any two-
i) Lambert Beer law
ii) Chemical shift
iii) Partition chromatography
(4 marks)

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