A button cell used in watches function as following. Zn_(s)+Ag_2O_(s)+H_2O_(l)⇌2Ag_(s)+Zn^{2+}_(aq)+2OH^{-}_(aq) If half cell potentials are Zn^{2+}_(aq)+2e^{-}\toZn_(s);E^\circ=-0.76V Ag_2O_(s)+H_2O_(l)+2e^{-}\to2Ag_(s)+2OH^{-}_(aq).E^\circ=0.34V The cell potential will be (2013 NEET)

Class 12 NEET Chemistry Electrochemistry Questions

Question : 33 of 74

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A button cell used in watches function as following.

Zn(s)+Ag2O(s)+H2O(l)⇌2Ag(s)+Zn(aq)2++2OH(aq)−
If half cell potentials are
Zn(aq)2++2e−→Zn(s);E°=−0.76V
Ag2O(s)+H2O(l)+2e−→2Ag(s)+2OH(aq)−.E°=0.34V

The cell potential will be

(2013 NEET)

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