Practice question

Given: What is the conductivity of a 0.02 M NaCl solution at 298 K if its molar conductivity is 115 S cm² mol⁻¹? These values define the system as per NCERT data. Formula: Lambda_m = kappa/c × 1000, kappa = Lambda_m × c/1000. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: kappa = 115 × 0.02/1000 = 0.0023 S cm^{-1 = 2.3 × 10⁻³ S cm^{-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.