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Refining methods: zone refining, van Arkel, Mond process, electrolytic refining
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Single correct option
Difficulty 1 of 3
mt170
Molten impure copper containing cuprous oxide is stirred with green wood poles. The refining method is called
A
zone refining
B
cupellation
C
liquation
D
poling
Answer: D
Hydrocarbon gases from the green wood reduce the dissolved
Cu
X
2
O
to copper. Stirring with poles is therefore called poling.
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