• # question_answer 43) ${{E}^{O-}}$values of some redox couples are given below. On the basis of these values choose the correct option.${{E}^{O-}}$values:$B{{r}_{2}}/B{{r}^{-}}=+1.90;A{{g}^{+}}/Ag(s)=+0.80;$ $C{{u}^{2+}}/Cu(s)=+\,0.34;{{I}_{2}}(s)/{{I}^{-}}=+0.54$ (a) Cu will reduce $B{{r}^{-}}$(b) Cu will reduce$\text{Ag}$ (c) Cu will reduce ${{I}^{-}}$                                                     (d) Cu will reduce $B{{r}_{2}}$

(d)$Cu+B{{r}_{2}}\to C{{u}^{2+}}+2B{{r}^{-}}$ $E_{\operatorname{Re}dox\,process}^{{}^\circ }=E_{\operatorname{Re}duced\,species}^{{}^\circ }-E_{OXidised\,species}^{{}^\circ }$ $=+1.90-(+0.34)=+1.56V$ Positive value shows that the redox process is feasible.