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What chemical process is used for obtain...

What chemical process is used for obtaining a metal from its oxide?

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The chemical process used for obtaining a metal from its oxide is called reduction.
The reducing agent used for the reduction of the metal oxide depends upon the reactivity of the given metal.
For example,
(i) Metals low in the activity series can be reduced to metals by heating alone their oxide.
(ii) The metals in the middle of the reactivity series, such as iron, zinc, lead, copper etc. are reduced to the metal by heating their oxide with carbon.
(iii) The metals high up in the reactivity series for example, carbon are obtained by electrolytic reduction.
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