MetallurgyHard
Question
The metal extracted by leaching with a cyanide is
Options
A.Mg
B.Ag
C.Cu
D.Na
Solution
Silver ore forms a soluble complex with NaCN from which silver is precipitated using scrap zinc.
Ag2S + 2NaCN → Na[Ag(CN)2]
Ag2S + 2NaCN → Na[Ag(CN)2]
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