How are the less reactive metals extracted?

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Solution

The less reactive metals are extracted by the reduction of their oxides by heat alone.
Example: Mercury(II) sulphide ore is roasted in air when mercury(II) oxide is formed. When this mercury (II) oxide is heated to about 300^o C, it decomposes to form mercury metal.

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How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.

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