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Which metal is extracted using a hydrome...

Which metal is extracted using a hydrometallurgical process involving complexation ?

A

Mg

B

Au

C

Sn

D

Zn

Text Solution

Verified by Experts

The correct Answer is:
B
`4Au + 8CN^(-) + 2H_(2)O rarr 4[Au(CN)_(2)]^(-)` (soluble complex) `+4OH^(-)`
`2[Au(CN)_(2)]^(-) + Zn rarr 2Au + [Zn(CN)_(4)]^(2-)`
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PHYSICS WALLAH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Level II
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  4. The iron obtained from the blast furnace is called:

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  6. The metal which is obtained from both sea- water and ores form the ea...

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

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  9. Electrolyte reduction method is used in the extraction of

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  10. In extraction of iron, limestone is used for

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  11. Aluminium metal is purified by :

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  12. High purity copper metal is obtained by

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  13. Crystallisation method is used for

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  14. The process of zone refining is used for :

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  15. Dolomite is mineral whose formula is:

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  18. Slag formed during smelting process in the extraction of Fe (from haem...

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