VTU Engineering Chemistry - May 2016 Exam Question Paper

VTU First Year Engineering (C Cycle) (Semester 1)
Engineering Chemistry
May 2016

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1(a) Explain the construction and working of silver-silver chloride electrode.

5 M

1(b) What are ion selective electrodes? Discuss the construction and working of a glass electrode.

6 M

1(c) Explain the construction and working of Zinc-Air cell.

5 M

2(a) Derive Nerst expression for single electrode potential.

5 M

2(b) Explain the following battery characteristics;
(i) Energy efficiency
(ii) Shel life
(iii) Cycle life

6 M

2(c) Explain the construction and working of Methanol - Oxygen fuel cell with H2SO4 electrolyte.

5 M

3(a) Explain electrochemical theory of corrosion with an example.

5 M

3(b) Discuss the differntial metal corrosion with an example.

5 M

3(c) What is electroless plating ? Mention the difference between electoplating and electroless plating.

6 M

4((c) Discuss the process of Galvanization of Iron sheet.

5 M

4(a) Discuss the following factor influencing nature of electrodeposit.
i) Brighteners
ii) Levellers and
iii) p^H

6 M

4(b) Explain electroplating of Decorative chromium .

5 M

5(a) How Calorific value of soild fuel is determined using bomb calorimeter?

5 M

5(b) What is meant by cracking? Desirbe with neat diagram, fluidized bed cracking method .

6 M

5(c) Explain the construction and working of photovoltaic cell .

5 M

6(a) 0.75g of coal containing 2 percentage hydrogen, when burnt in a bomb calorimeter, increased the tempreature of 2.7kg water from 27.2 degreeC. If the water equivalent of calorimeter is 1.2kg . Calculate gross and net calorific value (specific heat of water 4.187kj/kgdegree/C,latent heat of steam 2457kJ/kg).

6 M

6(b) Explain production of solar grade silicon by union carbide process.

5 M

6(c) Discuss the zone refining process purification of silicon .

5 M

7(a) Explain free radical mechanism of addition polymerization of vinyl chloride .

5 M

7(b) Give the synthesis and application of the following polymers;
i)PMMA
ii) polycarbonate .

6 M

7(c) What are polymer composites ? Explain synthesis , properties and application of Kevlar.

5 M

8(a) A polymer sample contains 200 molecules of molecular mass 2000, 300 molecules of molecular mass 3000 and 500 molecules of molecular mass 5000 . Calculate number average and weight average molecular masses of the polymer.

6 M

8(b) What is glass transition tempreature ? Explain any THREE factors that influence the glass transition tempreature.

5 M

8(c) What are conducting polymer ? Give the mechanism of conduction in polyaniline and two applications.

5 M

9(a) Explain the scale and sludge formation in boiler.

6 M

9(b) What is desalination ? Explain reverse osmosis process of desalination of sea water.

5 M

9(c) Explain synthesis of nano-material by sol-gel process.

5 M

10(a) Define COD. Calculate COD of 25CC of an effluent sample which requires 8.3CC of 0.001MK₂Cr₂O₇ for its complete oxidation.

5 M

10(b) Explain treatment of sewage by activated sludge process .

6 M

10(c) Explain synthesis of nano material by precipitation method .

5 M

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