AP EAMCET · Chemistry · General Principles and Processes of Isolation of Metals
Which of the following is not added during the extraction of silver by cyanide process?
- A \(\mathrm{NaCN}\)
- B Air
- C \(\mathrm{Zn}\)
- D \(\mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3\)
Answer & Solution
Correct Answer
(D) \(\mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3\)
Step-by-step Solution
Detailed explanation
In the extraction of silver from cyanide process (also Mac-Arthur Forrest process), the siliver compound dissolve in \(\mathrm{NaCN}\) solution forming a soluble complex salt, in presence of air, then silver is precipitated from this complex salt by the addition of…
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