Which one of the following is not a method of concentration of metals?

Gravity separation

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Froth flotation process

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Electromagnetic separation

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Smelting

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Solution

The correct option is B Smelting
Smelting is not a method of concentration of metals.

Smelting is a process of extraction of metal in its molten state by any reducing agent in the presence of flux.

For example: oxides of less electropositive metals like Pb, Zn, Fe, Cu are reduced by any other reducing agents.

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