Question:
Copper is extracted from copper pyrites by
Copper is extracted from copper pyrites by
Updated On: Apr 18, 2024
- Thermal decomposition
- Reduction by coke
- Electrometallurgy
- Auto reduction
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The Correct Option is D
Solution and Explanation
The formula of copper pyrites is $CuFeS _{2} .$ In auto reduction, the sulphide ores of the metals which are less electropositive like $Hg , Pb$ and $Cu$ are heated in the air so as to convert a part of it to its oxides. These oxides then react with the remaining sulphide ore in the absence of air, to give the metal and sulphur dioxide. The corresponding reaction is:
$Cu _{2} O +(1 / 2) Cu _{2} S \rightarrow 3 Cu +(1 / 2) SO _{2}$
$Cu _{2} O +(1 / 2) Cu _{2} S \rightarrow 3 Cu +(1 / 2) SO _{2}$
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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