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Cyanide or Macarthur Forrest Process

The metal ext...

Question

The metal extracted by leading with a cyanide is:

A

A l

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B

N a

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C

A g

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D

C u

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Solution

The correct option is B $A g$
The metal extracted by leaching with a cyanide is silver.
The reactions involved in the process are shown below.
$A g_{2} S + 4 N a C N ⇌ 2 N a [A g (C N)_{2}] + N a_{2} S$
$2 N a [A g (C N)_{2}] + Z n \to N a_{2} [Z n (C N)_{4}] + 2 A g ↓$

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