Extraction of gold and silver involves leaching with \( \mathrm{CN}^{-} \)ion. Silver is later r...

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Extraction of gold and silver involves leaching with \( \mathrm{CN}^{-} \)ion. Silver is later recovered by:
(NEET 2017)
\( \mathrm{P} \)
(a) distillation
(b) zone refining
W
(c) displacement with \( \mathrm{Zn} \)
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