1.

poling process is used forA. the removal of `Cu_(2)O` from CuB. The removal of `Al_(2)O_(3)` from AlC. the removal of `Fe_(2)O_(3)` from FeD. All of these

Answer» Correct Answer - A
When impure metal has impurity of its ow metal oxide. Then poling process is used e.g. impure Cu and Sn are purified by this method.


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