MHT CET202014 Oct 2020Morning ShiftChemistryElectrochemistryActual
What is the molar conductivity at infinite dilution of CaCl ₂ , if the molar conductivity of Ca ²⁺ ion and Cl ⁻ ion at infinite dilution is 119 and 71 ⁻¹ ~cm ² mol ⁻¹
Options
- A431 0 ⁻¹ ~cm ² ~mol ⁻¹
- B341 0 ⁻¹ ~cm ² ~mol ⁻¹
- C261 0 ⁻¹ ~cm ² ~mol ⁻¹
- D126 0 ⁻¹ ~cm ² ~mol ⁻¹
Correct answer
C. 261 0 ⁻¹ ~cm ² ~mol ⁻¹
Step-by-step solution
By Kohlrausch Law of independent migration of ions, aligned _ 0 ( CaCl ₂ ) &= _ Ca ²⁺ ⁰+2 _ Cl ⁻ ⁰ &=119+2(71) &=261.0 ⁻¹ ~cm ² ~mol ⁻¹ aligned