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NEET CHEMISTRYElectrochemistryEasy

Question

A button cell used in watches functions as following: Zn(s)+Ag2O(s)+H2O(l)2Ag(s)+Zn2+(aq)+2OH(aq)\text{Zn}(s) + \text{Ag}_2\text{O}(s) + \text{H}_2\text{O}(l) \rightleftharpoons 2\text{Ag}(s) + \text{Zn}^{2+}(aq) + 2\text{OH}^-(aq) If half-cell potentials are: Zn2+(aq)+2eZn(s)E=0.76 V\text{Zn}^{2+}(aq) + 2e^- \rightarrow \text{Zn}(s) \quad E^\circ = -0.76 \text{ V} Ag2O(s)+H2O(l)+2e2Ag(s)+2OH(aq)E=0.34 V\text{Ag}_2\text{O}(s) + \text{H}_2\text{O}(l) + 2e^- \rightarrow 2\text{Ag}(s) + 2\text{OH}^-(aq) \quad E^\circ = 0.34 \text{ V} The cell potential will be:

A

0.42 V

B

0.84 V

C

1.34 V

D

1.10 V

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NEET CHEMISTRY: "A button cell used in watches functions as following: $\text{Zn}(s) + \text{Ag}_2\text{O}(s) + \text{H}_2\text{O}(l) \r..." — Solved MCQ | TopperSquare