Question

Extraction of gold and silver involves leaching with CN⁻ ion. Silver is later recovered by ______.

Options

• Liquation

• Distillation

• Zone refining

• Displacement with Zn

Answer 1

Extraction of gold and silver involves leaching with CN⁻ ion. Silver is later recovered by displacement with Zn.

Explanation:

Extraction of gold and silver involves leaching with the cyanide ion (CN⁻). In this process, silver is later recovered by displacement with zinc (Zn). Zinc displaces silver from its complex, allowing silver to be recovered. This method is well known in the cyanide process for silver extraction. Thus, silver is recovered by displacement with Zn after leaching with cyanide ion.