MHTCET 13 Apr 2026 Shift 1 Paper

Concept:Kohlrausch's law describes how each ion contributes independently to the total molar conductivity of an electrolyte at infinite dilution.Explanation:At infinite dilution, the constituent ions of an electrolyte behave independently of each other.Each ion migrates without being influenced by the nature of the oppositely charged ion (co-ion) with which it was originally associated.Every ion makes a fixed, characteristic contribution to the total molar conductivity of the electrolyte.For a general electrolyte $A_xB_y$, the molar conductivity at infinite dilution is expressed as:$$\Lambda_m^{\circ} = x\lambda_{A^{y+}}^{\circ} + y\lambda_{B^{x-}}^{\circ}$$where $\lambda_{A^{y+}}^{\circ}$ and $\lambda_{B^{x-}}^{\circ}$ are the limiting molar conductivities of the respective ions.The given statement exactly matches this principle of independent migration of ions.Hence, the law is Kohlrausch's law of independent migration of ions.Answer:Option D: Kohlrausch's law of independent migration of ions.