The ion having highest mobility in aqueous solution is-

Be²⁺

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Mg²⁺

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Ca²⁺

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Ba²⁺

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Solution

The correct option is D
Ba²⁺

Though $B a^{2 +}$ is the heaviest ion but it is least hydrated. As a result, its size becomes lesser than any other hydrated alkaline earth metal cation and hence has the highest ionic mobility.

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The ion having highest mobility in aqueous solution is-

The correct option is D Ba2+ Though Ba2+ is the heaviest ion but it is least hydrated. As a result, its size becomes lesser than any other hydrated alkaline earth metal cation and hence has the highest ionic mobility.

The correct option is D
Ba²⁺

Though $B a^{2 +}$ is the heaviest ion but it is least hydrated. As a result, its size becomes lesser than any other hydrated alkaline earth metal cation and hence has the highest ionic mobility.