Question

The cell reaction of the galvanic cell: $ Cu(s)/C{{u}^{2+}}(aq)|\,|H{{g}^{2+}}(aq)|Hg(l) $

• A. $ Hg+C{{u}^{2+}}\to H{{g}^{2+}}+Cu $
• B. $ Hg+C{{u}^{2+}}\to C{{u}^{+}}+H{{g}^{+}} $
• C. $ Cu+Hg\to CuHg $
• D. $ Cu+H{{g}^{2+}}\to C{{u}^{2+}}+Hg $

Answer 1

Answer: (D)

Galvanic cell is $ Cu(s)/C{{u}^{2+}}(aq)||\,H{{g}^{2+}}(aq)|Hg $ In the above cell oxidation of copper and reduction of mercury takes place. Its cell reaction is written as: $ Cs(s)+H{{g}^{2+}}(aq)\xrightarrow{{}}C{{u}^{2+}}(aq)+Hg $