**Molar conductivity** $\Lambda$ is defined as:
A$\Lambda = \kappa^2 c$
B$\Lambda = c / \kappa$
C$\Lambda = \kappa / c$
D$\Lambda = \kappa \cdot c$
Answer & Solution
Correct answer: C. $\Lambda = \kappa / c$
Molar conductivity = conductivity divided by molar concentration: $\Lambda = \kappa/c$. In common units, $\Lambda = 1000\,\kappa/c$ when $\kappa$ is in Ω⁻¹ cm⁻¹ and $c$ in mol L⁻¹.
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