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Metallurgy three marks part2

12th Standard EM

    Reg.No. :


answer the following question:
Time : 00:30:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. Explain zone refining process with an example using the Ellingham diagram given below

  2. (A) Predict the conditions under which
    (i) Aluminium might be expected to reduce magnesia.
    (ii) Magnesium could reduce alumina.
    (B) Carbon monoxide is more effective reducing agent than carbon below 983K but, above this temperature, the reverse is true –Explain.
    (c) it is possible to reduce Fe2O3 by coke at a temperature around 1200K

  3. Give the uses of zinc.

  4. Explain the electrometallurgy of aluminium

  5. Explain the following terms with suitable examples.
    (i) Gangue
    (ii) slag

  6. Give the basic requirement for vapour phase refining.

  7. What is cyanide leaching? Give an example

  8. How oxides of metals are reduced by hydrogen?

  9. List the applications of gold

  10. What are the applications of the Ellingham diagram?


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