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Question

Blister copper is refined by stirring molten impure metal with green logs of wood because such woods liberate gases (like CH4 ). This process X is called , and it is used to purify the metal that initially contain impurities of the oxide Y. X and Y can be:

A
X = poling, Y=SnO2
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B
X = cupellation. Y = CuO
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C
X = cupellation, Y = ZnO
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D
X = poling, Y = CuO
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Solution

The correct option is D X = poling, Y = CuO
Poling is a purification process which is used for metals which contain their own oxide as an impurity

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