__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.

A. Bauxite

B. Limestone

C. Quartz

D. Manganese

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  5. Prussian blue is chemically represented by
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  14. Use of hydrated lime in water treatment
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  16. Use of chlorine in the treatment of sewage
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  19. Phthalic anhydride is used
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