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Silver metal is extracted from Ag(2) S b...

Silver metal is extracted from `Ag_(2) S` by cyanide process. The one is concentrated through froth floation process. The concentrated ore is the leached and solution is r ed with reducing agents to get spongy silver which then purified by fusion with an oxidant followed by electrolysis.
Leaching of `Ag_(2)S` is carried out by heating it with a dilute solution of

A

NaCN alone

B

NaCN in presence of `O_(2)`

C

HCI

D

NaOH

Text Solution

Verified by Experts

The correct Answer is:
B
Leaching of `Ag_(2)S: 2Na[Ag(CN)_(2)]`
`4g_(4)S+4NaCN hArr 2Na Ag(CN)_(2)+Na_(2)S`
`4Na_(2)S+5O_(2)+2H_(2)O to 2Na_(2)SO_(4)+4NaOH+2S`
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