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General Principles and processes of Isolation of Elements
normal
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
Similar Questions
Match List$-I$ with List$-II$ and select the correct answer using the codes given below the lists :
| List $-I$ | List $-II$ |
| $(a)$ van Arkel method | $1.$ Manufacture of caustic soda |
| $(b)$ solvay process | $2.$ Purifaction of titanium |
| $(c)$ Curpellation | $3.$ Manufacture of $Na_2CO_3$ |
| $(d)$ Poling | $4.$ Purifaction of copper |
| $5.$ Refiining of silver |
Codes :
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