Most important five mark questuions in chemistry chapter one metallurgy

12th Standard EM

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Chemistry

Use blue pen only
Time : 00:25:00 Hrs
Total Marks : 25
    Answer all the following questions
    5 x 5 = 25
  1. Describe the role of the following in the process mentioned.
    (i) Silica in the extraction of copper.
    (ii) Cryolite in the extraction of aluminium.
    (iii) Iodine in the refining of Zirconium.
    (iv) Sodium cyanide in froth floatation.

  2. Explain the principle of electrolytic refining with an example.

  3. The selection of reducing agent depends on the thermodynamic factor: Explain with an example.

  4. Give the limitations of Ellingham diagram

  5. Write a short note on electrochemical principles of metallurgy.

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TN 12th Standard EM Chemistry free Online practice tests

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