HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryMetallurgyAchiever Section
Silver is extracted from its native ore by:
A.Formation of soluble complex by dilute solution of✓ Correct
B.Formation of soluble complex by dilute solution of
C.Roasting followed by the self reduction
D.Roasting followed by electrolytic reduction
Explanation
O₂ oxidases silver to silver (l) ion which then produces soluble complex with CN– ions. 2 2 2 2 2 4 1 2 4 2 2 2 2 → Ag NaCN O H O Na Ag CN NaOH Na Ag CN Zn Na Zn CN Ag
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