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Which metal is leached from its ore by t...

Which metal is leached from its ore by the use of `KCN`

A

Copper

B

Zinc

C

Gold

D

Iron

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Verified by Experts

The correct Answer is:
C
Native gold is leached using dilute solution of `KCN`
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ALLEN-METALLURGY-EXERCISE-02
  1. Which of the following metal can not be extracted by smelting process

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  2. The reduction of Cr(2)O(3), by heating it with aluminium is known as

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  3. Which metal is leached from its ore by the use of KCN

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  4. Name the flux to remove the impurity of SiO(2)

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  5. Mercury containers are made of

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  6. Autoreduction process is used in the extraction of

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  7. When Alumina is electrolysed in presence of cryolite, the gas liberate...

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  8. In the extraction of copper, metal is formed in the Bessemer converter...

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  9. x,y and z in the following processes are respectively (i) P(2)O(5) +...

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  10. Which of the following process involves smelting

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  11. Out of the following which ores are calcinated during extraction (a)...

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  12. Which of the following match are incorrect

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  13. Valachite on calcination gives rarr 'A' + CO(2) +H(2)O. Compound 'A' o...

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  14. Which of the following ores are calcinared during extraction

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  15. Which method of purification is represented by the following equations...

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  16. Which are correctly is matched

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  17. Which of the following reaction is a part of Serpeck's process

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  18. (xiv) Following equation represents a method of purification of nickel...

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  19. Which substance is used as basic refractory material in furnace

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  20. Carbon cannot be used in the reduction of A1(2)O(3) because:

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