Question

Assertion: If ${\lambda }_{N{a}^{+}}^{\circ }+{\lambda }_{C{l}^{-}}^{\circ }$ are molar limiting conductivity of the sodium and chloride ions respectively, then the limiting molar conducting for sodium chloride is given by the equation: ${\lambda }_{NaCl}^{\circ }={\lambda }_{N{a}^{+}}^{\circ }+{\lambda }_{C{l}^{-}}^{\circ }$
Reason:This is according to Kohlrausch law of independent migration of ions.

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

Answer 1

The correct option is A If both assertion and reason are true and the reason is the correct explanation of the 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”.