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Account for the following facts: (a) T...

Account for the following facts:
(a) The reduction of a metal oxide is easier if the metal formed is in the liquid state at the temperature of reduction.
(b) Limestone is used in the manufacture of pig iron from haematite.
(c) Pine oil is used in the froth flotation process used to concentrate sulphide ores.

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ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (SHORT ANSWER QUESTIONS)
  1. Describe the role of the following: Cryolite in the extraction of a...

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

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

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

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  5. Name the method used for the refining of (i) nickel (ii) Titanium.

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

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

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

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

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

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

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

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  13. Describe the role of the following: Cryolite in the metallurgy of A...

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  14. Explain the role of each of the following in the extraction of metals ...

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  15. Explain the role of each of the following in the extraction of metals ...

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  16. Explain the role of each of the following in the extraction of metals ...

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  17. State the role of depressant in froth floatation process.

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  18. What is the function of SiO(2) in the metallurgy of copper?

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  19. State the role of graphite rod in the electrolytic reduction of alu...

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  20. Write down the reactions taking place in different zones in the blast ...

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