______________ is an ore concentrating metallurgical process involving a chemical change?
Correct answer: C. Roasting
- A. Electromagnetic separation
- B. Froth floatation
- C. Roasting
- D. None of these
Explanation
Roasting heats an ore in air and causes chemical reactions such as oxidation, decomposition, or sulphide conversion. Electromagnetic separation and froth flotation are mainly physical separation methods.
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