The standard electrode potential of M+/M in aqueous solution does not depend on

Strategy: The standard electrode potential is determined by the total energy change involved in transferring a metal atom from the solid phase to an aqueous ion. This is typically analyzed using a Born-Haber cycle.

The Electrochemical Cycle (Born-Haber):

1. Sublimation: $\ce{M(s) \rightarrow M(g)}$ (Involves Enthalpy of Sublimation)
2. Ionization: $\ce{M(g) \rightarrow M^+(g) + e^-}$ (Involves Ionization Enthalpy of the gaseous atom)
3. Hydration: $\ce{M^+(g) \rightarrow M^+(aq)}$ (Involves Enthalpy of Hydration)

Analysis of Options:

• (a), (b), (d) are all direct steps in this cycle.
• (c) Ionization of a solid metal atom: This is not a meaningful thermodynamic step because ionization occurs in the gas phase after sublimation. Acids/Potential cycles don't measure the "ionization of a solid".

$\boxed{\text{Answer: (c) Ionisation of a solid metal atom}}$