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General Principles and processes of Isolation of Elements
hard
Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like $CH_4$). This process $X$ is called _________ and the metal contains impurities of $Y$ is _________.
A
$X =$ cupellation, $Y = CuO_2$
B
$X =$ polling, $Y = Cu_2O$
C
$X =$ polling,$ Y = CuO$
D
$X =$ cupellation, $Y = CuO$
Solution
The refining process of blister copper is known as polling.
The $Cu _2 O$ impurities are present in the copper metal.
In presence of heat of molten metals, the green logs liberate hydrocarbon gases which reduce copper oxide into copper.
Standard 12
Chemistry
