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NEET2012ChemistryElectrochemistryActual

Molar conductivities ( _m^ ) at infinite dilution of NaCl , HCl and CH ₃ COONa are 126.4, 425.9 and 91.0 ~S ~cm cmol ⁻¹ respectively. ^ _m for CH ₃ COOH will be

Options

  1. A425.5 ~S ~cm ^2 ~mol ⁻¹
  2. B180.5 ~S ~cm ^2 ~mol ⁻¹
  3. C290.8 ~S ~cm ^2 ~mol ⁻¹
  4. D390.5 ~S ~cm ^2 ~mol ⁻¹

Correct answer

D. 390.5 ~S ~cm ^2 ~mol ⁻¹

Step-by-step solution

aligned & CH ₃ COONa + HCl NaCl + CH ₃ COOH & 91+425.9=126.4+x & x=516.9-126.4 & =390.5 ~S ~cm ^2 ~mol ⁻¹ & aligned

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