Which of the following reactions occurs at the cathode of a common dry cell?
- A$Mn \to Mn^{2+} + 2e^-$
- B$2MnO_2 + Zn^{2+} + 2e^- \to ZnMn_2O_4$
- C$2ZnO_2 + Mn^{2+} + 2e^- \to MnZn_2O_4$
- D$Zn \to Zn^{2+} + 2e^-$
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Given the data at $25\, ^oC$:
$Ag + I^{-} \rightarrow AgI + e^-$,$E^o = 0.152\, V$
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What is the value of $\log K_{sp}$ for $AgI$? $(2.303\, RT/F = 0.059\, V)$
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