Question

Which of the following statements are true for Leaching?

• A. It involves treatment of ore with a suitable reagent as to make it soluble.
• B. During leaching, impurities remain insoluble and the ore is recovered from solution by using a suitable chemical method.
• C. Gold and silver are extracted from their native ores by Leaching
• D. Leaching offers excellent chemical selectivity and flexibility throughout the process and also minimizes the need for very high temperatures and refractory materials

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A It involves treatment of ore with a suitable reagent as to make it soluble.
B During leaching, impurities remain insoluble and the ore is recovered from solution by using a suitable chemical method.
C Gold and silver are extracted from their native ores by Leaching
D Leaching offers excellent chemical selectivity and flexibility throughout the process and also minimizes the need for very high temperatures and refractory materials

Leaching is defined as a process of treatment of ore with a suitable reagent during which impurities remain insoluble and ore is recovered from solution by a particular chemical method. Do note that sometimes the recovery of the ore could be a direct result of a physical phenomenon (like crystallization).

Further, leaching offers excellent chemical selectivity and flexibility throughout the process and also minimizes the need for very high temperatures and refractory materials.