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Metallurgy two marks part2

12th Standard EM

    Reg.No. :
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Chemistry

answer the following question
Time : 00:30:00 Hrs
Total Marks : 20
    Part-A
    10 x 2 = 20
  1. What is the difference between minerals and ores?

  2. What are the various steps involved in extraction of pure metals from their ores?

  3. What is the role of Limestone in the extraction of Iron from its oxide Fe2O3?

  4. Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

  5. Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

  6. Describe a method for refining nickel

  7. Why is the froth floatation method selected for the concentration of sulphide ores?

  8. What is Ellingham diagram? or
    What does Ellingham diagram represent?

  9. Define metallurgy.

  10. Define roasting,

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