Question

extraction of metals from its Ores present in the earth crust

Answer 1

The method used to extract metals from the ore in which they are found depends on their reactivity. For example, reactive metals such as aluminium are extracted byelectrolysis, while a less-reactive metal such as iron may be extracted by reduction with carbon or carbon monoxide.

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Answer 2

It is simply known as extraction of minerals or extraction of minerals from an ore.