Question

Consider the half-cell reduction reaction

Mn²⁺ + 2e^- → Mn, E° = - 1.18 V

Mn²⁺  → Mn³⁺ + e^-, E° = - 1.51 V

The E° for the reaction 3Mn²⁺ → Mn° + 2Mn³⁺, and possibility of the forward reaction are respectively

(a) - 4.18 V and yes 

(b) + 0.33 V and yes

(c) + 2.69 V and no

(d) - 2.69 V and no

Answer 1

Correct option (d) - 2.69 V and no

Explanation :

Since the E^o value is negative, so the process is non-spontaneous.