Q.

In the metallurgy of iron, the upper layer obtained in the bottom of blast furnace mainly contains:

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a

CaSiO3

b

spongy iron

c

Fe2O3

d

FeSiO3

answer is A.

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Detailed Solution

CaO+SiO2→CaSiO3 (slag) (Haematite ore contains silica as impurities). Slag being lighter and insoluble in molten metal floats over and thus forms upper layer.
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