CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals2 Marks
Question
What chemical process is used for obtaining a metal from its oxide?
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Answer
solution Metal oxides can be converted to metal by a process called reduction. For example, Zinc oxide is reduced to metallic zinc by heating with carbon.
$ZnO(s)+C(s) \rightarrow Zn(s)+CO(g)$
Besides carbon, highly reactive metals like sodium, calcium, aluminium etc. are used as reducing agents. These displace metals of low reactivity from their oxide, e.g.,
$Fe_2 O_3(s)+2 Al(s) \rightarrow 2 Fe(l)+Al_2 O_3(s)+\text { Heat }$
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