a
an alloy of calcium and iron
b
coke
c
impure iron
d
calcium trioxosilicate (IV)
Explanation
Correct Option
dVideo Explanation
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Discussions (4)
Parkzih
2 years ago
Yes, the correct answer is D: Calcium, because......
Calcium oxide reacts with silicon dioxide to give silicate melts and runs down through the furnace to form a layer on top of the molten iron. It can be tapped off from time to time as slag.
King33Victor
3 weeks ago
option D is very correct
here is a logic behind it.
if there is no decomposition of CaCO3 in the blast furnace to remove impurities, there will be no slag.
