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Which of the following metal is leached ...

Which of the following metal is leached by Cyanide process

A

Na

B

Cu

C

AI

D

Ag

Text Solution

Verified by Experts

The correct Answer is:
D
Among the given, Ag-metal is leached by cyanide process.
`4Ag(s)+8CN^(-)+O_(2)+2H_(2)O`
`to [Ag(CNl)_(2)]+4overset(-)(O)H`
The pure metal is noe displaced from the solution by active metal like Zn(zinc)
`[2Ag(CN)_(2)]^(-)+Zn to 2Ag(s) darr +[Zn(CN)_(4)]^(2-)`
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