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Q.

Which of the following statements is not correct for leaching?

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a

Ore should be soluble in a suitable solvent.

b

It is done for low grade ores.

c

Leaching of ${Al}_{2} O_{3}$ from bauxite is based on amphoteric nature of bauxite.

d

None of the above

answer is D.

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Detailed Solution

Leaching ore should not be soluble in a suitable solvent and done for low-grade ore.

An ore is a rock that contains sufficient amounts of a metal or a metal combination to make it economically viable to extract the metal: Only a minor portion of the metal or its compound can be found in low-grade ores. A higher proportion can be found in high-grade ores.

A substance that may react as both an acid and a base is called amphoteric. ${Al}_{2} O_{3}$ , as an illustration.

Hence, all Statements are not correct for leaching

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Which of the following statements is not correct for leaching?