1.

During the process of electrolyic refining of copper some metals present as impurity settle as anode mud. These areA. `Fe`and `Ni`B. `Ag`and `Au`C. `Sn`and `Ag`D. `Pb`and `Zn`

Answer» Correct Answer - D
The impurities of more electropositive metals remain as ions in the bath whereas impurities of less electropositive metals `(Ag`and `Au)` remain unionized and settle down under the anode as anode mud or anode sludge.


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