engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test General Science Chemistry Electrochemistry
At 298 K, the standard electrode potentials of Cu2+/Cu, Zn2+ /Zn, Fe2+ /Fe and Ag+ /Ag are 0.34 V, -0.76 V, -0.44 V and 0.80 V, respectively.
On the basis of standard electrode potential, predict which of the following reaction can not occur?
1
2CuSO4(aq) + 2Ag(s) → 2Cu(s) + Ag2 SO4(aq)
2
CuSO4(aq) + Zn(s) → ZnSO4(aq) + Cu(s)
3
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
4
FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)