Q48 / 180 · AIIMS 2018 (27 May) · Chemistry

Assertion : Molar conductivity of a weak electrolyte at infinite dilution cannot be determined experimentally. Reason : Kohlrausch law helps to find the molar conductivity of a weak electrolyte at infinite dilution.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • Correct answer
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

In the plot of molar conductivity versus concentration, for weak electrolyte the extrapolation to zero concentration is not possible.

Hence, the correct answer is option: 'B'.

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