Which of the following is an acidic flux?

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Question

(A) flux is a substance added to the furnace to remove gangue (impurities) from the ore. Acidic flux is used to remove basic impurities. $SiO_2$ (sili

Vedclass · Accepted Answer

$SiO_2$

Vedclass · Answer

(A) flux is a substance added to the furnace to remove gangue (impurities) from the ore. Acidic flux is used to remove basic impurities. $SiO_2$ (silica) is an acidic oxide and acts as an acidic flux. It reacts with basic impurities like $CaO$ to form slag: $CaO + SiO_2 \rightarrow CaSiO_3$ (slag). Therefore,$SiO_2$ is the correct answer.

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