A) An acidic flux is needed
B) A basic flux is needed
C) Both acidic and basic flux are needed
D) Neither of them is needed
Correct Answer: B
Solution :
\[\underset{\text{Acidic}\,\text{impurity}}{\mathop{Si{{O}_{2}}}}\,+\underset{\text{Basic}\,\text{flux}}{\mathop{CaO}}\,\to \underset{\text{Slag}}{\mathop{CaSi{{O}_{3}}}}\,\]
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