The cell reaction of the galvanic cell Cu(s)|Cu^ 2+ (aq) |Hg^ 2+ (aq)|Hg(l) is

MHT CET Chemistry question

The cell reaction of the galvanic cell \mathrm{Cu(s)|Cu^{2+}(aq)\|Hg^{2+}(aq)|Hg(l)} is

(A)\mathrm{Hg + Cu^{2+} \to Hg^{2+} + Cu}
(B)\mathrm{Hg + Cu^{2+} \to Cu^+ + Hg^+}
(C)
(D)\mathrm{Cu + Hg^{2+} \to Cu^{2+} + Hg}Correct

Answer: (D)

Solution

In the cell notation the left electrode is the anode, where Cu is oxidised to , and the right electrode is the cathode, where is reduced to Hg, so the net reaction is

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Question ID VK-066961