Multiple choice

Which of the following options is the process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide?

  1. Calcination

  2. Roasting

  3. Electrolysis

  4. None of these
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A Correct answer
Explanation

Calcination is the process of heating a carbonate ore strongly in the absence of air. This converts carbonate ores like zinc carbonate (ZnCO3) into metal oxides (ZnO) and carbon dioxide. Roasting is similar but done in the presence of air, producing sulfur dioxide for sulfide ores. Electrolysis is an entirely different process using electricity.

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