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Q.

An acidic flux among the following is

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a

CaH2

b

CaO

c

MgO

d

SiO2

answer is C.

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Detailed Solution

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SiO2 is an acidic oxide and used as an acidic flux to remove basic impurities in the form of slag
FeO+SiO2⟶FeSiO3(slag)
SiO2 is used in the extraction of Cu to remove FeO.

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