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The carbon-based reduction method is NOT...

The carbon-based reduction method is NOT used for the extraction of

A

tin from ` SnO _ 2 `

B

iron from ` Fe_2O_ 3 `

C

aluminium from alumina

D

magnesium from ` MgCO_3.CaCO_3 `

Text Solution

Verified by Experts

The correct Answer is:
C, D
Highly electropositive metals like Al and Mg are not obtained by reduction of their oxides with carbon since they form their corresponding carbides. Instead they are obtained by electrolytic reduction of their fused salts, i.e., Al from fused ` Al_ 2 O _ 3 ` and Mg from fused ` MgCl _ 2 `
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