First slide

Conductivity , Molar conductivity and Equivalent Conductivity

Question

The ionic conductance of the following cations in a given concentration are in the order

Easy

A

Li⁺ < Na⁺ < K⁺ < Rb⁺
B

Li⁺ > Na⁺ > K⁺ > Rb⁺
C

Li⁺ < Na⁺ > K⁺ > Rb⁺
D

Li⁺ = Na⁺ < K⁺ < Rb⁺

Solution

In a given concentration means aqueous solution.
In aqueous solution Size of hydrated ions depends on degree of Hydration which inturn depends on size of cation.
Degree of Hydration $\propto$ 1/size of ion
Size of Hydrated ion $\propto$ degree of Hydration
Larger the size of hydrated ion lesser is the ionic mobility and lesser is the ionic conductance.

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