Q.
Before introducing FeO in blast furnace, it is converted to Fe2O3 by roasting so that
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a
It may not be removed as slag with silica
b
It may not evaporate in the furnace
c
Presence of it may increase the m.pt. of change
d
None.
answer is A.
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Detailed Solution
FeO is capable forming slag with SiO2 SiO2+FeO→FeSiO3
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