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Highly electropositive metal(s) can not ...

Highly electropositive metal(s) can not be commercially extracted by carbon reduction process at high temperature because these :

A

metals combine with carbon to form covalent carbide

B

metals combine with carbon to form ionic carbide

C

`Delta G_(f)` of highly electropositive metal oxide is having low negative value

D

metal oxides are not reduced by carbon

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The correct Answer is:
B
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