During the electrolytic refining of blister copper, an 'anode mud' or 'anode sludge' is deposited beneath the impure copper anode. Which of the following sets of elements are predominantly recovered f

Question

During the electrolytic refining of blister copper, an 'anode mud' or 'anode sludge' is deposited beneath the impure copper anode. Which of the following sets of elements are predominantly recovered from this anode mud?

Prashant Kotian · Accepted Answer

Correct answer: B. In electrolytic refining, the anode is made of impure copper. During electrolysis, more electropositive impurities (Fe, Zn, Ni) dissolve into the electrolyte solution as ions, while less electropositive, noble impurities (Ag, Au, Pt) do not dissolve and fall to the bottom as anode mud.

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