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MHT CET Chemistry question

ChemistryElectrochemistryMHT CET

A button cell used in watches functions as following Zn(s) + Ag_2O(s) + H_2O(l) \rightleftharpoons 2Ag(s) + Zn^{2+}(aq) + 2OH^-(aq) If half-cell potentials are ; Ag_2O(s) + H_2O(l) + 2e^- \rightarrow 2Ag(s) + 2OH^-(aq); The cell potential will be [MHTCET 2013]

Answer: (A)

Solution

; 0.42 V and 0.84 V are

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Question ID VK-066999