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Types of Element: Metals - Extracting Metals Towards the Top of the Activity Series

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Extracting Metals towards the Top of the Activity Series:-

The metals high up in the reactivity series are very reactive. They cannot be obtained from their compounds by heating with carbon. For example, carbon cannot reduce the oxides of sodium, magnesium, calcium, aluminium, etc., to the respective metals. This is because these metals have more affinity for oxygen than carbon. These metals are obtained by electrolytic reduction.

Sodium is obtained by electrolysis of molten chloride. Sodium is deposited at cathode, whereas chlorine is liberated at the anode. The reaction is given as

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