Question:
In electrorefining of copper some gold is deposited at
In electrorefining of copper some gold is deposited at
Updated On: Jul 28, 2022
- cathode
- anode mud
- cathode mud
- electrode
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The Correct Option is B
Solution and Explanation
In electrolytic refining of copper some gold is deposited below anode. Impure copper usually contains $Ag,\, Au,\, Ni,\, Zn,\, Fe,\, Pb,\, Sn$ etc, as impurity. Impure metal is taken as anode dipped in the acidified solution of copper sulphate. The impurities of $Ni$, Fe and $Zn$ pass into solution as sulphate while impurity of $Ag,\, Au$ and $Sn$ etc. Are thrown down as anode mud below anode.
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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