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COMEDK · Chemistry · 18. Electrochemistry

Given below are 2 statements: Assertion and Reason. Choose the correct option.
Assertion: When Molar conductivity for a strong electrolyte is plotted versus \(\sqrt{C}(\mathrm{~mol} / \mathrm{L})^{1 / 2}\), a straight line is obtained with intercept equal to Molar conductivity at infinite dilution for the electrolyte and Slope equal to \(-\mathrm{A}\). All electrolytes of a given type have the same \(\mathrm{A}\) value.
Reason: At infinite dilution, strong electrolytes of the same type will have different number of ions due to incomplete dissociation.

  1. A Assertion is correct but Reason is incorrect statement.
  2. B Assertion is incorrect but Reason is correct statement.
  3. C Both Assertion and Reason are incorrect statements.
  4. D Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Verified Solution

Answer & Solution

Correct Answer

(A) Assertion is correct but Reason is incorrect statement.

Step-by-step Solution

Detailed explanation

The molar conductivity of a strong electrolyte varies with concentration according to the Kohlrausch equation: \(\Lambda_m = \Lambda_m^{\circ} - A\sqrt{C}\). This equation represents a straight line when \(\Lambda_m\) is plotted against \(\sqrt{C}\), where the intercept is…