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In the extraction of ‘Cu’ from low grade oxide ores, the ore is leached out by using

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dil acids

$H_{2}$

answer is A.

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Detailed Solution

The copper from low grade ores and scraps is extracted by hydrometallurgy. It is leached out using acid or bacteria.

formic acid can be utilised as an organic leaching reagent in the leaching process of other ores that are similar in structure and composition to malachite.

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