Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Electro Chemistry

Question:

The correct SI unit of molar conductivity is

Options:

$S\, cm^{-1}\, mol^{-1}\, L$

$S\, cm^{-1}\, mol^{-1}$

$S\, m^{-1}\, mol^{-1}$

$S\, m^{-1}\, mol$

Correct Answer:

$S\, m^{-1}\, mol^{-1}$

Explanation:

The correct answer is Option (3) → $S\, m^{-1}\, mol^{-1}$

  • Molar conductivity (Λₘ) is given by:
    Λₘ = κ × (1000 / C)

  • Where:

    • κ (conductivity) → S m⁻¹

    • C (concentration) → mol m⁻³

So,

  • Λₘ = S m⁻¹ × m³ mol⁻¹

  • = S m² mol⁻¹