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In the extraction of gold, the cyanide s...

In the extraction of gold, the cyanide solution acts as a

A

leaching agent that dissolves the impurities

B

Flux

C

leaching agent that acts a complex forming reactant

D

reducing agent that converts the metal oxide or sulphide into the metal

Text Solution

Verified by Experts

The correct Answer is:
C
When the gold pass into the solution of sodium or potassium cyanide forming the respective soluble complex cyanides while the impurities remain unaffected which are filtered off.
`4Au+8KCN+O_(2)+2H_(2)Orarr underset("Pot.dicyanoaurate(I) (solubl e compl ex"))(4K[Au(CN)_(2)]+4KOH`
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In the extraction of gold the gas used is

Statement-1:In cyanide process for the extraction of gold and silver from their natives, ores, the cuanide solution acts as a reducing agent to reduce the gold and siver compound present in the ores into the metallic states. Statement-2:In the extraction of gold and silver, the cyanide solution acts as complexing ragent in the presence of air and form their respective soluble complexes.

Write the chemical reaction involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction.

A2Z-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS-Metallurgy Of Cu, Fe, Ag, Al, Zn, And Au
  1. Magnesium is extracted from ore carnallite by :

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  2. Consider the following steps: Cu(2)Soverset("roa st i n air")rarrAov...

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  3. In the extraction of gold, the cyanide solution acts as a

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

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  5. Ag(2)S +NaCN rarr (a) (a) +Zn rarr (d) (b) is a metal. Hence (a) a...

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  6. NaC1 and CaC1(2)are added to fused MgC1(2)in the electrolysis of Mgc1(...

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  7. Red bauxite contains chief impurity of ferric oxide but contains some ...

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  8. The puddler's candles are produced due to the burning of

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  9. Which one of the following metals cannot be extracted by carbon reduct...

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  10. The mette is impure substance obtained during the extraction of

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  11. In electrolysis of A1(2)O(3)by Hall-Heroult process:

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  12. During the extraction of gold the following reactions takes place Au...

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  13. Native silver metel froms a water solube, complesx with a dilute aqueo...

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  14. Aluminium metal is purified by:

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  15. Extraction of Ag from sulphide ore and removal of unreacted silver bro...

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  16. In the electrolytic refining of zinc,

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  17. Silver can be separated form lead by:

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

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  19. when compared to DeltaG^(@) for the formation of A1(2)O(3) the Deltag^...

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  20. The method of zone relining of metal is based on the principle of AIFM...

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