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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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