Poling process is used for :...

Poling process is used for `:`

A

the removal of `Cu_(2)O` from Cu

B

The removal of `Al_(2)O_(3)` from Al

C

the removal of `Fe_(2)O_(3)` from Fe

D

All of these

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The correct Answer is:

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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