Fusion of bauxite and ________________ produces high alumina cement?
Correct answer: B. Limestone
- A. Alum
- B. Limestone
- C. Coke
- D. Quartz
Explanation
High-alumina cement is made by fusing bauxite, rich in alumina, with limestone, which supplies calcium oxide. Coke and quartz do not provide the required cement-forming composition.
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