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Silica reacts with what to give out fayalite?

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in Casting-Forming-Welding I by (687k points)
Silica reacts with what to give out fayalite?

(a) Iron

(b) Iron Sulphate

(c) Iron Oxide

(d) Iron Carbide

I have been asked this question in an internship interview.

I'd like to ask this question from Mold-Metal Reaction in division Mold and Mold Making of Casting-Forming-Welding I

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Best answer
Correct choice is (c) Iron Oxide

The best I can explain: In the formation of the compound fayalite (FeOSiO2), Iron oxide reacts with silica to give out the compound fayalite or iron chrysolite.

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