Chemistry · Importance of coordination compounds (in qualitative analysis, extraction of metals and in biological systems)
Silver can be obtained from silver glance by:
Silver can be obtained from silver glance by:
- A. from floatation followed by polling
- B. leaching by \( N a C N \) followed by thermal reduction
- C. leaching by \( \left(N a C N+O_{2}\right) \) followed cupellation
- D. None of these
Step-by-step solution
Silver glance (Ag2S) is extracted by leaching with sodium cyanide in presence of oxygen to form soluble complex Na[Ag(CN)2]. The solution is then treated with zinc to precipitate silver, which is further purified by cupellation. Thus, option C correctly describes the cyanide leaching with O2 followed by cupellation.
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