The correct order of conductivity of ions in water is:
The correct order of conductivity of ions in water is:
Option 1 -
Rb⁺ > Na⁺ > K⁺ > Li⁺
Option 2 -
Cs⁺ > Rb⁺ > K⁺ > Na⁺
Option 3 -
K⁺ > Na⁺ > Cs⁺ > Rb⁺
Option 4 -
Na⁺ > K⁺ > Rb⁺ > Cs⁺
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1 Answer
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Correct Option - 2
Detailed Solution:In an aqueous medium, all alkali metal cations are converted into their hydrated form. More intensely positive cations have more hydration, and hence the size of the cation increases after hydration. Therefore, the Li? cation has a larger size in hydrated form and the least conductivity. The order of conductivity of alkali metal ions is: Li? < Na? < K? < Rb? < Cs?
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