Which method will you use to reduce the following ? (i) Oxides of less reactive metals (ii) Oxides of moderately reactive metals (iii) Oxides of highly reactive metals. explain by giving a suitable example.

Which method will you use to reduce the following ? (i) Oxides of les

1.	Which method will you use to reduce the following ? (i) Oxides of less reactive metals (ii) Oxides of moderately reactive metals (iii) Oxides of highly reactive metals. explain by giving a suitable example.
Answer» Solution :(i) `2HgO overset("Heat")rarr 2Hg + O_(2)` `2Cu_(2)O + Cu_(2)S overset("Heat")rarr 6Cu + SO_(2)` (ii) Reduction using carbon `ZnO + C rarr Zn + CO` Sometimes, some highly reactive METALS are used as reducing AGENTS. e.g., `3MnO_(2) + 4Al rarr 3Mn + 2Al_(2)O_(3) + "heat"` or `Fe_(2)O_(3) + 2Al rarr 2Fe + Al_(2)O_(3) + "heat"` (ii) Electrolytic reduction e.g., Na, Mg and Ca are obtained by electrolysis of their molten chlorides.