Practice question

Given: What is the molar conductivity at infinite dilution for MgSO₄ if the ionic molar conductivities of Mg²⁺ and SO₄²⁻ are 106.0 S cm² mol⁻¹ and 160.0 S cm² mol⁻¹ respectively? These values define the system as per NCERT data. Formula: Kohlrausch’s law: Lambda_m⁰ = lambda_{Mg^{2+⁰ + lambda_{SO_4^{2-⁰. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Lambda_m⁰ = 106.0 + 160.0 = 266.0 S cm² mol^{-1 . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.