STANDARD Chemistry Standard Electrode Potentials MCQ Question
E°{Mn³⁺/Mn²⁺} is highly positive than that of E°{Cr³⁺/Cr²⁺} or E°_{Fe³⁺/Fe²⁺} because
Mn²⁺ (d⁵) can be easily oxidised to Mn³⁺(d⁴) due to low ionisation enthalpy
Ionisation enthalpy of Mn is much larger due to stable half filled d⁵ electronic configuration of Mn²⁺
Correct Answer
Detailed Explanation
The Mn²⁺ ion has a stable half-filled d⁵ configuration, making it more favorable to oxidize to Mn³⁺, which has a less stable d⁴ configuration.
Found an issue with this question?
Related Questions
More from Electrochemistry
The molar conductivity of 0.007 M acetic acid is 20 S cm² mol⁻¹. What is the dissociation constant of acetic acid? Choose the correct option. [Λ°_H⁺ =...
An electric charge of 5 Faradays is passed through three electrolytes AgNO₃, CuSO₄ and FeCl₃ solution. The grams of each metal liberated at cathode wi...
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...
More from
Calculate the dissociation constant \( K_a \) for acetic acid given that its conductivity is \( 4.95 \times 10^{-5} \text{ S cm}^{-1} \) at a concentr...
Match Column-I with Column-II. Column-I Column-II (a) Cathode reaction (i) Cu 2+ (aq) + 2e – → Cu (s) (b) Anode reaction (ii) Cu(s) ...