Which one of the following ores is concentrated by chemical leaching method?

Galena

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Copper pyrite

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Cinnabur

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Argentite

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Solution

The correct option is D Argentite
Gold and silver ores are concentrated by leaching. In this method, the ore is treated with a suitable reagent in which ore is soluble but impurities do not. Thus, impurities are removed by filtration.
Among galena $(P b S),$ copper pyrites $(C u F e S_{2}),$ cinnabar $(H g S)$ and argentite $(A g_{2} S)$ argentite being silver ore is concentrated by chemical leaching method.

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