Chemistry - Metallurgy Question with Solution | TestHub

ChemistryMetallurgyExtraction of MetalsMedium2 minQB

ChemistryMediumsingle choice

Which of the following is NOT related to extraction of metal from silver glance :-

Answer:

Solution:

The extraction of silver from silver glance (Ag₂S) involves the cyanide process.

1. Leaching: Ag₂S reacts with NaCN to form a soluble dicyanoargentate(I) complex. Air acts as an oxidizing agent.

$A g_{2} S + 4 N a CN + \frac{1}{2} O_{2} + H_{2} O \to 2 N a [A g (CN)_{2}] + 2 N a O H + S$

2. Reduction: Silver is precipitated from the complex by reduction with zinc dust.

$2 N a [A g (CN)_{2}] + Z n \to N a_{2} [Z n (CN)_{4}] + 2 A g$

Thermal decomposition of the cyanide complex is NOT part of this process.

Stream:JEESubject:ChemistryTopic:MetallurgySubtopic:Extraction of Metals

⏱ 2mℹ️ Source: QB

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