Question

With reference to extraction of metal, answer the following:

What is the process of removing impurity from crude metal called?

Options

• Roasting

• Calcination

• Refining

• Concentration

Answer 1

Refining

Explanation:

Refining is the process of removing impurities from crude (impure) metal to obtain metal in its pure form. This is usually the final step in the extraction of metals. Common methods include electrolytic refining, poling, and distillation, depending on the metal involved.