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State briefly the principles which serve...

State briefly the principles which serve as the basis for the following operations in metallurgy?
(i) Froth floatation process
(ii) Zone refining (iii) Refining by liquation.

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State briefly the principles which serve as basis for the following operations in metallurgy : (i) Froth floatation process (ii) Zone refining (iii) Refining by liquation

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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. Describe the leaching of aluminium ore.

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  2. Explain the basic principles of the following metallurgical operations...

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  3. State briefly the principles which serve as the basis for the followin...

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  4. Write the chemical reactions which take place in the following operati...

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  5. Write the chemical reactions which take place in the following operati...

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  6. Write the chemical reactions which take place in the following operati...

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  7. What chemical principle is involved in choosing a reducing agent for g...

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  8. Describe the role of the following: NaCN in the extraction of silve...

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  9. Describe the role of the following: Cryolite in the extraction of a...

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  10. Give reason : Reduction of Cr(2) O(3) with Al is thermodynamically fea...

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  11. Account for the following facts: (a) The reduction of a metal oxide ...

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  12. Account for the following facts : pine oil is used in froth floatat...

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  13. Name the method used for the refining of (i) nickel (ii) zirconium.

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  14. The extraction of Au by leaching with NaCN involves both oxidation and...

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  15. Describe how the following changes are brought about: Pig iron into...

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  16. Describe how the following changes are brought about: Zinc oxide to...

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  17. Describe how the following changes are brought about: Impure titani...

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  18. What is the utility of air blast in the extraction of iron in blast fu...

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  19. What is 'anodisation'? Give an example of the process.

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  20. Describe the role of the following: lodine in the refining of titan...

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