C-08-Q202mediumsingle_mcqReaction at the cathode in silver electroplating:aAg→AgX++eX−\ce{Ag -> Ag+ + e-}AgAgX++eXbAgX++eX−→Ag\ce{Ag+ + e- -> Ag}AgX++eXcCuX2++2 eX−→Cu\ce{Cu^2+ + 2e- -> Cu}CuX2++2eXdOX2+4 eX−→2 OX2−\ce{O2 + 4e- -> 2O^2-}OX2+4