______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?
Correct answer: C. Limestone
- A. Bauxite
- B. Quartz
- C. Limestone
- D. Manganese
Explanation
Limestone acts as the flux in a blast furnace. It decomposes to lime, which combines with silica and other earthy impurities to form a fusible slag; bauxite, quartz and manganese do not perform this fluxing role here.
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