Chemistry - Electrochemistry Question with Solution | TestHub

Paragraph:Redox reaction play a pivotal role in chemistry and biology. The values of standard redox potential $\left(E^{\circ }\right)$ of two half-cell reactions decide which way the reaction is expected to proceed. A simple example is a Daniel cell in which zinc goes into solution and copper gets deposited. Given below are a set of half-cell reactions (acidic medium) along with their $E^{\circ }(V$ with respect to normal hydrogen electrode) values. Using this data obtain the correct explanations to Questions 14-19. $$\begin{array}{cl}{\mathrm{I}}_2+2e^{-}⟶2{\mathrm{I}}^{-}& E^{\circ }=0.54\\ {\mathrm{Cl}}_2+2e^{-}⟶2{\mathrm{Cl}}^{-}& E^{\circ }=1.36\\ {\mathrm{Mn}}^{3+}+e^{-}⟶{\mathrm{Mn}}^{2+}& E^{\circ }=1.50\\ {\mathrm{Fe}}^{3+}+e^{-}⟶{\mathrm{Fe}}^{2+}& E^{\circ }=0.77\\ {\mathrm{O}}_2+4{\mathrm{H}}^{+}+4e^{-}⟶2{\mathrm{H}}_2\mathrm{O}& E^{\circ }=1.23\end{array}$$