Question:
The metal extracted by leaching with a cyanide is
The metal extracted by leaching with a cyanide is
Updated On: May 15, 2024
- $Al$
- $Ag$
- $Cu$
- $Na$
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The Correct Option is B
Solution and Explanation
Silver are forms a soluble complex with NaCN form which silver is precipitated using scrap zinc.
(i) $Ag _{2} S +2 NaCN \longrightarrow Na \left[ Ag \left( CN _{2}\right] Zn \right.$
(ii) $Na _{2}\left[ Zn \left( CN _{k}\right]+ Ag \downarrow\right.$
Sodium argentocyanide (soluble)
(i) $Ag _{2} S +2 NaCN \longrightarrow Na \left[ Ag \left( CN _{2}\right] Zn \right.$
(ii) $Na _{2}\left[ Zn \left( CN _{k}\right]+ Ag \downarrow\right.$
Sodium argentocyanide (soluble)
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Concepts Used:
Refining
Refining is an industrial process of reducing the impurities of a substance. In simpler terms, refining is a process of purification of metals to remove the impurities from them to obtain the metals in the purest form.
Refining Methods of Metals
There are various methods used in the refining process of metals. They are listed below-
- Distillation
- Liquidation
- Poling
- Oxidation
- Electrolytic refining
- Zone refining
- Vapour phase refining
- Van-Arkel method
- Chromatographic method
Check: Zone Refining