Which metal cannot be extracted by carbon reduction process

Asked by admin @ 20/08/2021 in Science viewed by 340 People

Why do the metals with reactivity cannot be extracted by reduction of oxides

Answered by admin @ 20/08/2021

Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal.

The metal oxide loses oxygen, and is therefore reduced. The carbon gains oxygen, and is therefore oxidised.

Using iron as an example:

iron oxide + carbon → iron + carbon dioxide

2Fe2O3(s) + 3C(s) → 4Fe(l) + 3CO2(g)

The source of carbon for this reduction is coke, obtained by heating coal in the absence of oxygen. Note that the iron is liquid when it is formed, due to the very high temperature at which the reaction takes place.

Some metals, such as aluminium, are so reactive that their oxides cannot be reduced by carbon.

Which metal cannot be extracted by carbon reduction process

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