JEE Main20253 Apr 2025Morning ShiftChemistryElectrochemistryActual
Correct order of limiting molar conductivity for cations in water at 298 K is :
Options
- AH ⁺ Na ⁺ K ⁺ Ca ²⁺ Mg ²⁺
- BH ⁺ Ca ²⁺ Mg ²⁺ K ⁺ Na ⁺
- CMg ²⁺ H ⁺ Ca ²⁺ K ⁺ Na ⁺
- DH ⁺ Na ⁺ Ca ²⁺ Mg ²⁺ K ⁺
Correct answer
B. H ⁺ Ca ²⁺ Mg ²⁺ K ⁺ Na ⁺
Step-by-step solution
Limiting Molar Conductivities of Ions: - H : 349.8 Scm ^2 ~mol ⁻¹ - Na ⁺: 50.11 Scm ^2 ~mol ⁻¹ - K ⁺: 73.52 Scm ^2 ~mol ⁻¹ - Ca ⁺²: 119 Scm ^2 ~mol ⁻¹ - Mg ⁺²: 106.12 Scm ^2 ~mol ⁻¹ Therefore correct order of limiting molar conductivity of cations will be - H Ca ⁺² Mg ⁺² K ⁺ Na ⁺