CY2111 Engineering Chemistry I - November/December 2010 Question Paper - JPR Notes

Anna University

B.E./B.Tech.Degree Examinations, November/December 2010

Regulations 2008

First Semester

Common to all branches (except Marine Engineering)

CY2111 Engineering Chemistry I

Time: Three Hours                                            Maximum: 100 Marks

Answer ALL Questions

Part A - (10 x 2 = 20 Marks)

1. Define alkalinity. List the different types of alkalinity.

2. What is calgon conditioning?

3. Differentiate between addition and condensation polymerization techniques.

4. What are FRPs? Name any two important FRPs.

5. What are the different types of adsorption?

6. What do you understand by `purification by absorption?

7. What are non-conventional energy sources? Give two examples.

8. Write the chemical reactions taking place at cathode and anode in a hydrogenoxygen fuel cell.

9. How is unsatisfactoriness under load measured?

10. Define ash and fire points of a lubricant.

Part B - (5 x 16 = 80 Marks)

11.  (a) (i) Explain the steps involved in domestic water treatment. (Marks 8)

(ii) Define hardness. Classify the types of harnesses. How are they estimated?

(Marks 8)

OR

11. (b) (i) Discuss in detail the disadvantages, which are caused by the use of hard

water in boilers with special reference to foaming, corrosion, scale and sludge formation and caustic embrittlement. (Marks 10)

(ii) Discuss in detail desalination of water by reverse osmosis. List its advantages and limitations. (Marks 6)

12. (a) (i) How are the following polymers prepared? (Marks 8)

(1) Teflon

(2) Polystyrene

(3) PET

(4) Nylon 6, 6.

(ii) Explain the mechanism of free radical addition polymerization. (Marks 8)

OR

12. (b) (i) What is vulcanization of rubber? List out the changes caused due to the

vulcanization of rubber. (Marks 8)

(ii) What are synthetic rubbers? How is butyl rubber prepared? (8)

13. (a) (i) Explain the effect of pressure on adsorption. (Marks 8)

(ii) Explain the assumptions of Langmuir's adsorption theory. (Marks 8)

OR

13. (b) (i) It i s stated that `Solid surfaces can adsorb dissolved solutes from solutions. Give an example of such a case. What are the commonly encountered adsorption isotherms applicable for adsorption of solutes from solutions? Explain the effect of concentration of solute in the solution. (Marks 8)

(ii) Discuss the role of adsorption in catalysis. (Marks 8)

14. (a) (i) What is nuclear discussion? Explain the nuclear fission of 235U as a source of energy. (Marks 8)

(ii) Explain the principle of operation of solar cells. (Marks 8)

OR

14. (b) (i) Outline the construction and working of a lead-acid battery. (Marks 8)

(ii) Explain the Construction of a nickel-cadmium cell and give its cell reaction. (Marks 8)

15. (a) (i) Explain any five properties of refractories? (Marks 10)

(ii) What are abrasives? How are they classified? Give one example for each. (6)

OR

15. (b) (i) Give the structures of graphite and molybdenum disulphide. How do they

function as lubricants? (Marks 8)

(ii) Write a note on the applications of carbon nano tubes. (Marks 8)