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A flux is chemical leaning agent, flowing agent or purifying agent. They may have more than one function at a time. They are used in both extractive metallurgy and metal joining. Which of the following is an example of acidic flux?

(a) SiO

(b) CaO 

(c) MgO 

(d) None of these

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Correct option: (a) SiO2

Acidic flux is used to remove basic impurity. Here, SiO2 is an acidic flux.

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