JEE Main 2025 Chemistry question
0.2% (w/v) solution of NaOH is measured to have resistivity 870.0 mΩ m. The molar conductivity of the solution will be × 10² mS dm² mol⁻¹. (Nearest integer)
Answer: 23
Solution
M = 0.05 mol/L; κ = 1/870×10⁻³ = 1.15 Sm⁻¹; Λm = κ×1000/M = 230 S cm² mol⁻¹ = 23×10² mS dm² mol⁻¹.