Extraction of gold and silver involves leaching with CN ^ - ion. Silver is later recovered by

NEET 2017 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)NEET 2017

Not in JEE Main or NEET syllabus

Extraction of gold and silver involves leaching with ion. Silver is later recovered by

(1)Liquation
(2)Distillation
(3)Zone refining
(4)Displacement with ZnCorrect

Answer: (4)

Solution

In the cyanide (MacArthur-Forrest) process the native ore is leached with dilute NaCN in the presence of air: , giving the soluble complex sodium dicyanoargentate(I). The metal is recovered by displacement

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Question ID VK-092104