Chemical method used in concentration of ore is known as ___________.

bleaching

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leaching

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roasting

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calcination

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Solution

The correct option is D leaching
Leaching is a chemical method of concentration of ores. It involves the treatment of the ore with a suitable reagent so as to make it soluble while impurities remain insoluble. The ore is recovered from the solution by suitable chemical method. Copper is recovered from chemical solutions by leaching processes such as solvent extraction.

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