Medium
In the electrolytic refining of blister copper,the total number of main impurities,from the following,removed as anode mud is .... .
$Pb, Sb, Se, Te, Ru, Ag, Au$ and $Pt$
$Pb, Sb, Se, Te, Ru, Ag, Au$ and $Pt$
- A$5$
- B$6$
- C$4$
- D$3$
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