chemistry UNIT V (16 marks)First year student question bank

  1. What are refractories? How are they calssified? Discuss the requisites of refractory materials.
  2. What are the characteristic properties of good refractory materials/ Give the specific application of acidic, basic and neutral refractory materials?
  3. Explain the manufacture, properties and uses of any one of  acidic and basic refractories.
  4. Write the preparation, properties and uses of high alumina bricks.
  5. Bring out a detailed discussion on magnesite bricks.
  6. What are the general methods of preparation of refractories?
  7. What are abrasives? How are they classified? Give their uses.
  8. Write a note on synthetic abrasives.
  9. What are the different types of abrasives? Describe a process of manufacture of carborundum. Mention its uses.
  10. How is SiC manufactured?
  11. What are abrasives? How are they classified? Write briefly on grinding wheels.
  12. How is abrasive paper or cloth manufactured?
  13. Compare the structure of graphite and molybdenum disulphide and their uses in lubrication. What are greases? When are they used? Give the preparation of Lithium grease.
  14. What are greases? When are they used? Explain the structure of any one solid lubricant.
  15. Write the detailed account on the graphite.
  16. Indicate the preparation and uses of lithium grease.
  17. Write notes on flash and fire point of a lubricant.
  18. Explain the significance of solid lubricants with example.
  19. Write detailed notes on lubricants.
  20. Explain the following properties of lubricants and give their significances

a) Flash and fire point b) Cloud and pour point.
  1. Write an essay on solid lubricants with emphasis on their classification,       

      mechanism of action, examples and applications.
  1. Discuss four important characteristics of lubricants.
  2. How are lubricants classified? Mention the additives added to the lubricants and give their functions.
  3. Bring out the differences between hydrocarbon lubricants and vegetable oil lubricants.
  4. Explain with examples, the action of corrosion resistant, anti-oxidant and viscosity index improving additives in the case of lubricating oils.
  5. Discuss any four important properties of a good lubricant. Write briefly on synthetic lubricants.
  6. Explain the terms "Cloud and pour points" "flash and fire point".
  7. Explain the term "viscosity index used in lubricant technology.
  8. Give an account of the important properties of lubricating oil.
  9. Discuss the important properties of lubricants and indicate the significance of these properties.
  10. Name any four additives for lubricating oils. Indicate their function.
  11. Explain the mechanism of lubrication.
  12. Give a comparative account of different types of lubrication.
  13. What are carbon nanotubes? Explain their types.
  14. Write synthesis, properties and applications of carbon nanotubes.
  15. Write notes on the followings with examples.

a)   The role of CNTs in catalysis.

      CNTs in storage devices.

      38. Explain the structure of CNTs.
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