Before introducing FeO in blast furnace, it is converted to Fe2O3 by roasting so that

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It may not be removed as slag with silica

It may not evaporate in the furnace

Presence of it may increase the m.pt. of change

None.

answer is A.

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Detailed Solution

FeO is capable forming slag with SiO2 SiO2+FeO→FeSiO3

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