chemistry chapter one creative three mark questions

12th Standard EM

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Chemistry

Use blue pen only
Time : 00:30:00 Hrs
Total Marks : 30

    Part - A

    Answer all the questions

    10 x 3 = 30
  1. Explain alkali leaching in the extraction of aluminum,

  2. How is acid leaching done for the sulphide ores?

  3. Before reduction, the ore is first convertedI into the oxide of metal of interest. Gtve reason

  4. Explain roasting with an example.

  5. Explain calcination with an example.

  6. What is vapour phase method?

  7. Distinguish Roasting and Calcination

  8. Write the complete set of reactions occurring in the zone of reduction in the blast furnace in the metallurgy of iron.

  9. What is the role of depressants in froth flotation process?

  10. Define the term slag.

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