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Question

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

A
CaSiO3
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B
Spongy iron
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C
Fe2O3
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D
FeSiO3
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Solution

The correct option is A CaSiO3
CaO+SiO2CaSiO3 (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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