Question

The process by which metals like gold and silver are refined or purified is called:

• A. electrolysis
• B. electroplating
• C. electrorefining
• D. purification

Answer 1

The correct option is C electrorefining

Electrorefining of metals is a process of obtaining pure metal from the impure one by the process of electrolysis.

It use electroplating on a large scale and are important techniques for the economical and straightforward purification of non-ferrous materials.

The most common electrorefined metals are lead, copper, gold, silver, zinc etc.