Multiple choice

What is the process of purifying impure metals called?

  1. Refining

  2. Roasting

  3. Regulating

  4. None of these
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A Correct answer
Explanation

Refining is the final process in metallurgy where impure metal (obtained from reduction of ore) is purified to remove residual impurities and obtain the pure metal. Different refining methods include liquation, distillation, poling, electrolytic refining, and zone refining. Roasting is an earlier process that converts sulfide ores to oxides, not a purification method. Regulating is unrelated to metallurgy.

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