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In which of the following isolation no r...

In which of the following isolation no reducing agent is required

A

iron from haematite

B

aluminium from bauxite

C

mercury from cinnabar

D

zinc from zinc blends

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The correct Answer is:
C
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MOTION-METALLURGY-EXERCISE 2 (LEVEL - I)
  1. Blister Cu is about

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  2. Which one of the following is not a method of concentrain of ore?

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  3. In which of the following isolation no reducing agent is required

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  4. Chemical leaching is useful in the concentration of:

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  5. The element which could be extracted by electrolytic reduction of its ...

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  6. When roasting is carried out: (P) sulphde ore sare converted into ox...

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  7. The form of iron obtained from blast furnace is:

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  8. Which of the following is not an ore:

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  9. Which one of the following statements is not correct

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  10. In the extraction of nickel of Mond's process, the metal is obtained b...

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  11. B4C (boron carbide) is used except:

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  12. Froth floatation process is based on

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  13. When ZnS and PbS minearls are present together, then NaCN is added to ...

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  14. When copper is purified by electrorefining process, noble metals like ...

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  15. Formation of volatile Ni(CO)(4) and then its subsquent decomposition i...

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  16. Match column–I (process) with column–II (electrolyte) : Column–I (p...

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  17. (I) FeCr2 O4 + NaOH + air to (A) + Fe2O3 (II) (A) + (B) to NaCr2O7 ...

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  18. (I) FeCr2 O4 + NaOH + air to (A) + Fe2O3 (II) (A) + (B) to NaCr2O7 ...

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  19. (I) FeCr2 O4 + NaOH + air to (A) + Fe2O3 (II) (A) + (B) to NaCr2O7 ...

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  20. (I) FeCr2 O4 + NaOH + air to (A) + Fe2O3 (II) (A) + (B) to NaCr2O7 ...

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