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Extraction of gold and silver involves l...

Extraction of gold and silver involves leaching the metal with `CN^(-)` ion. The metal is recovered by (1) Displacement of metal by some other metal from the complex ion (2) Roasting of metal complex (3) Calcination followed by roasting (4) Thermal decomposition of metal complex

A

displacement of metal by some other metal from the complex ion

B

roasting of metal complex

C

calcination followed by roasting

D

thermal decomposition of metal complex

Text Solution

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The correct Answer is:
A
Extraction of gold and silver involves leaching the metals with `CN^(-)` ion. The metal is recovered displacement of metal by some other metals from the complex ion.
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