NEET 2022 Chemistry Standard Electrode Potentials MCQ Question
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 CANNOT occur?
FeSO₄(aq) + Zn(s) → ZnSO₄(aq) + Fe(s)
2CuSO₄(aq) + 2Ag(s) → 2Cu(s) + Ag₂SO₄(aq)
CuSO₄(aq) + Zn(s) → ZnSO₄(aq) + Cu(s)
CuSO₄(aq) + Fe(s) → FeSO₄(aq) + Cu(s)
Correct Answer
Detailed Explanation
The reaction in option B cannot occur because silver (Ag) has a higher reduction potential than copper (Cu), meaning Ag cannot displace Cu from its salt.
Found an issue with this question?
Related Questions
More from Electrochemistry
Calculate the emf of the cell in which of the following reaction takes place Ni(s) + 2Ag⁺(0.002M) ⟶ Ni²⁺(0.160M) + 2Ag(s) Given that E°cell = 1.05V
The molar conductance of NaCl, HCl and CH₃COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm² mol⁻¹ respectively. The molar conductance of CH...