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The common depressant used in froth floa...

The common depressant used in froth floatation process for separation of ZnS and PbS is :

A

Eucalyptus oil

B

Sodium sulphide

C

Sodium cyanide

D

Lime

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Verified by Experts

The correct Answer is:
C
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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Multiple Choice Questions - Level - II
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  2. The process of removal of impurities form a crude metal is called :

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  3. The common depressant used in froth floatation process for separation ...

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  4. When copper ore is mixed with silica in a reverberatory furnace copper...

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  5. Which of the following reactions is an example of auto reduction ?

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  6. In the extraction of copper from its sulphide ore, the metal is formed...

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  7. Electrolytic refining is used to purify which of the following metal...

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  8. Extraction of gold and silver involves leaching the metal with CN^- io...

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  9. Coke is used in metallurgical process process chiefly as

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  10. Which of the following statement is not true ?

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  11. In the equation , 4M +8CN^(-) +2H2O+O2 rarr 4[M(CN)2]^(-)+4OH^(-), the...

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  12. Identify the reaction that does not take place in a blast furnace.

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  13. The temperature of the slag zone in the metallurgy of iron using blast...

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  14. Which of the following methods is used for obtaining aluminium metal ?

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  15. The metal used to recover copper from a solution of copper sulphate is

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  16. Which of the following pair of metals is purified by Van Arkel method ...

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  17. Duralumin is used in aircraft industry for its light weight and high s...

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  18. Which one of the following is true in electrolytic refining ?

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  19. In the extraction of copper from its sulphide ore, the metal is formed...

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  20. The reduction of zinc oxide with coke occurs at temperature

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