$E^{\circ}$ values of some redox couples are given below. On the basis of these values choose the co

Question

$E^{\circ}$ values of some redox couples are given below. On the basis of these values choose the correct option.\ $E^{\circ}$ values : $\mathrm{Br}_2 / \mathrm{Br}^{-}=+1.90 ; \mathrm{Ag}^{+} / \mathrm{Ag}_{(s)}=+0.80$;\ $\mathrm{Cu}^{2+} / \mathrm{Cu}_{(s)}=+0.34 ; \mathrm{I}_{2(s)} / \mathrm{I}^{-}=+0.54 \mathrm{~V}$

Professor PC Thomas Classes · Answer

(d) : More positive the value of $E^{\circ}$, greater is the tendency of the species to get reduced. On the basis of the given $E^{\circ}$ values, $\mathrm{Br}_2$ is having highest $E^{\circ}$ value ( +1.90 ) hence, Cu will easily reduce $\mathrm{Br}_2$.