Molar conductivity (Λm) increases as the concentration of the electrolyte decreases. This is because at lower concentrations, the ions experience less interionic attraction and can move more freely, increasing conductivity per mole of electrolyte.
Among the given concentrations, 0.001 M is the most dilute solution and thus has the highest molar conductivity.
Correct Answer: 0.001 M
If the molar conductivity ($\Lambda_m$) of a 0.050 mol $L^{–1}$ solution of a monobasic weak acid is 90 S $cm^{2} mol^{–1}$, its extent (degree) of dissociation will be:
[Assume: $\Lambda^0$ = 349.6 S $cm^{2} mol^{–1}$ and $\Lambda^0_{\text{acid}}$ = 50.4 S$ cm^{2} mol^{–1}$]