Q.

Poling process is used for:

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a

Removal of Cu from Cu2O

b

Removal of Al from Al2O3

c

Removal of Fe from Fe2O3

d

All of these

answer is A.

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Detailed Solution

it is used for removing Cu and Cu2O3Cu2O+CH4⟶6Cu+CO+2H2OIn the poling method, metals having oxide impurities are purified. Here the molten impure metal is stirred with green poles of wood. These poles are a rich source of hydrocarbon gases. These hydrocarbon gases reduce oxides (impurities), e.g., in the purification of Blister copper.
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