07a1bs04 Applied Chemistry

Code No. 07A1BS04 4

UNIT-3 & APPLIED CHEMISTRY

1. What is corrosion? How it is different from erosion? Explain wet corrosion with an example. 2. What is the chemical composition of the corrosion product of iron? Explain dry corrosion with an example. 3. With suitable examples explain briefly the electrochemical corrosion. 4. Write a brief note on (i) cathodic protection (ii) cementation. 5. Write down the factors that affect the rate of corrosion of a metal and Explain any two briefly. 6. Explain the following briefly with suitable examples (i) Sacrificial anode (ii) Cementation. 7. Explain the mechanism of wet corrosion with a suitable example. 8. Write a brief note on (i) Metal cladding (ii) Galvanisation 9. .What are chemical conversion coatings? Explain with examples 10. Explain with examples how do you protect a metal or an alloy by (i) sacrificial anode (ii) impressed current 11. List out the important methods of surface preparation and Explain any one in detail. 12. Explain how you protect a metal by (i) Inhibitors (ii) Proper design 13. Explain briefly the electrochemical theory of corrosion. 14. Distinguish anodic coatings from cathodic coatings with suitable examples. 15. Write brief note on (i) galvanic corrosion (ii) concentration cell corrosion with suitable examples. 16. Write short notes on (i) Sheradizing (ii) Phosphate coatings. 17. Briefly explain the hydrogen evolution type of corrosion with an example. 18. Write a brief note on (i) cathodic protection (ii) anodic protection. 19. Write a brief note on surface preperation and its significance. 20. Write a brief note on Metallic coatings. -oOo-

Code No. 07A1BS04

UNIT-5 APPLIED CHEMISTRY

1. 2. 3. 4.

List out the types of polymerization and describe any one with an example. Differentiate between addition polymerization and condensation polymerization. What is co-polymerisation? Give an example. Write down the monomers of the following (i) Nylon 6.6 (ii) Buna N (iii) Bakelite (iv)Nylon 6(v) Natural rubber 5. What is natural rubber? Explain the vulcanization of rubber. 6. What are the properties of natural rubber? How these properties are modified after vulcanization? 7. Differentiate the properties of natural rubber and vulcanized rubber In a tabular form. 8. Write a brief note on synthetic rubbers with an example? 9. Diffrentiate between thermoplastics and thermosetting plastics. 10. What is compounding of plastics? Explain the function of each constituent used in compounding of plastics. 11. List out the various methods of fabrication of plastics and explain any one in detail. 12. Classify the following as to thermoplastics/thermosetting plastics? Nylon (ii) Bakelite (iii) Natural rubber (iv) polyester (v) Thiokol 13. Explain briefly the mechanism of addition polymerization with a suitable example. 14. Describe the preparation of bakelite and its engineering applications 15. Briefly describe the preparation and uses of Teflon. 16. Name the monomer of natural rubber describe the process of vulcanization. 17. Differentiate between addition and condensation polymerization with an example.. 18. Name the monomer of the following polymers and mention their Engineering applications. (i) Teflon (ii) bakelite. 19. Explain extrusion moulding of plastics with a neat diagram. 20. Write a brief note on synthetic rubbers with an example. -oOo-