Which of the following oxides is not present in hematite iron ore ?
Correct answer: C. Cobalt oxide
- A. Titanium oxide
- B. Calcium oxide
- C. Cobalt oxide
- D. Manganese oxide
Explanation
Hematite is mainly Fe2O3 and may contain common gangue or impurity oxides such as TiO2, CaO, and MnO. Cobalt oxide is not a usual constituent listed for hematite ore, making it the best choice.
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