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Which method of refining nickel is represented by the following equation?
$Ni$ (impure) $+ 4CO$ $\xrightarrow{320 \ K} Ni(CO)_4$ $\xrightarrow{420 \ K} Ni$ (pure) $+ 4CO$

Which metal is ultrapurified by carbon monoxide?

$A$ metal which is refined by poling is

In order to refine "blister copper",it is melted in a furnace and stirred with green logs of wood. The purpose is:

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Refining using the liquation method is the most suitable for metals with:

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