A) remove all impurities from ores
B) reduce metal oxide
C) remove silica
D) remove silica and undesirable metal oxides
Correct Answer: C
Solution :
Flux is an external material that is added during smelting to convert infusible impurities into an easily fusible material known as slage. It is used to remove silica, \[\text{Si}{{\text{O}}_{\text{2}}}\text{.}\]
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