Which of the following ores are extracted by electrolysis of their fused compounds

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Extraction of Metals at the bottom of the activity series (Ag, Hg etc)

Extraction of Metals at the top of the activity series (K, Na, Ca, Mg and Al)

Extraction of Metals in the middle of the activity series (Zinc, iron, tin, lead and copper)

Extraction of Metals having oxide ores, sulphide ores, carbonate ores

answer is B.

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Detailed Solution

K, Na, Ca, Mg and Al are highly reactive metals. The ores of highly reactive metals are not easily fusible. The temperature required for the reduction is to high and more expensive.

To make the process economical and comfortable, the only method possible is to extract the highly reactive metals by electrolysis of their fused compounds.

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