One of the methods of purification of leach liquor is ion exchange, wh

1.	One of the methods of purification of leach liquor is ion exchange, which involves
A.	exchange between two liquid phases.
B.	exchange between a gaseous phase and a liquid phase.
C.	exchange between a liquid phase and an organic resin phase.
D.	exchange between a solid phase and a gas phase.
Answer» D. exchange between a solid phase and a gas phase.

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One of the methods of purification of leach liquor is ion exchange, which involves

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