Question

Slag formed in blast furnace, removes the impurity of

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• A. $FeO$
• B. $Si{O}_2$
• C. $C{O}_2$
• D. $CaO$

Answer 1

The correct option is B $Si{O}_2$

In the blast furnace, $Si{O}_2$ is removed as calcium silicate.
$\underset{\text{Flux}}{CaO}+\underset{\text{Impurity}}{Si{O}_2}\to \underset{\text{Slag}}{CaSi{O}_3}$