Question

When is ore subjected to leach?

• A. When the ore is an immiscible liquid
• B. When the impurity is immiscible
• C. When both ore and impurity are in soluble in water
• D. When only impurity is soluble in water

Answer 1

Answer:

D. When only impurity is soluble in water

• Leaching is used when only the impurity is soluble in water, while the valuable ore remains insoluble. This process washes away the unwanted waste easily.

• When only impurity is soluble in water (or when the ore is insoluble and impurities dissolve,)