First slide

General methods of extraction of elements from the earth crust

Question

Highly electropositive metals can not be extracted by carbon reduction process because these:

Moderate

A

Metals combine with carbon to form carbides
B

Metals do not react with carbon
C

Metal oxides are not reduced by carbon
D

Loss of metal is more by vaporisation

Solution

highly electropositive metals are soft metals and have weak metallic bond strength, due to which they vapourise easily compared to other metals

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