Assertion (A) : Molar conductivity decreases with increase in concentration. Reason (R) : When concentration approaches zero, the molar conductivity is known as limiting molar conductivity.

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Assertion-ReasonVariation of Molar Conductivity with ConcentrationCBSE PYQ

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In a plot of Λm against the square root of concentration (C1/2) for strong and weak electrolyte, the value of limiting molar conductivity of a weak electrolyte cannot be obtained graphically. Suggest a way to obtain this value. Also state the related law, if any.

TextVariation of Molar Conductivity with ConcentrationKohlrausch's Law of Independent Migration of Ions

The conductivity of 2·5 × 10⁻⁴ M methanoic acid is 5·25 × 10⁻⁵ S cm⁻¹ and its Λ°ₘ has a value 400 S cm² mol⁻¹. Calculate its molar conductivity and degree of dissociation.

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Variation of Molar Conductivity with Concentration