Practice question

Given: What is the molar conductivity at infinite dilution for NaCl if the ionic molar conductivities of Na⁺ and Cl⁻ are 50.1 S cm² mol⁻¹ and 76.3 S cm² mol⁻¹ respectively? These values define the system as per NCERT data. Formula: Kohlrausch’s law: Lambda_m⁰ = lambda_{Na^{+⁰ + lambda_{Cl^{-⁰. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Lambda_m⁰ = 50.1 + 76.3 = 126.4 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.