Periclase refractory contains mainly________________?
Correct answer: B. MgO
- A. CaO
- B. MgO
- C. Al2O3
- D. SiO2
Explanation
Periclase is essentially crystalline magnesium oxide, MgO, obtained from magnesite or other magnesium-bearing materials. Thus MgO, rather than CaO or silica, is its main constituent.
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