MCQ
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: If $\lambda^\circ_{\text{Na}^+}$ and $\lambda^\circ_{\text{Cl}^-}$ are molarlimiting conductivities of the sodiumandchlorideionsrespectively, then the limiting molar conductivity for sodium chloride is given by the equation$, \wedge^\circ_{\text{NaCl}}=\lambda^\circ_{\text{Na}^{+}+}\lambda^\circ_{\text{Cl}^{-}}$
Reason: This is according to Kohlrausch law of independent migration of ions.
  • Assertion and reason both are correct statements and reason is correct explanation for assertion.
  • B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  • C
    Assertion is correct statement but reason is wrong statement.
  • D
    Assertion is wrong statement but reason is correct statement.

Answer

Correct option: A.
Assertion and reason both are correct statements and reason is correct explanation for assertion.
According to Kohlrausch law, "limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte."

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