Question

What is the process of leaching in case of low grade copper ores?

• A. Leaching is carried out with $NaOH$ and $O_2$
• B. Leaching is carried out with $NaCN$
• C. Leaching is carried out with acids in presence of $O_2$
• D. Leaching is carried out by boiling the ore with water

Answer 1

Answer: (C)

Leaching is carried out with acids in presence of $O_2$

Leaching of low grade copper ores is carried out with acid or bacteria, when copper goes into solution as $C{u}_{\left(aq\right)}^{2+}+H_{2\left(g\right)}\to C{u}_{\left(s\right)}+2H_{\left(aq\right)}^{+}$