Extraction of gold and silver involves leaching the metal with CN^– ion. The metal is recovered by ________________.
Extraction of gold and silver involves leaching the metal with CN– ion. The metal is recovered by ________________.
(i) displacement of metal by some other metal from the complex ion.
(ii) roasting of metal complex.
(iii) calcination followed by roasting.
(iv) thermal decomposition of metal complex.
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