Out of these alkali metal ions in aqueous solutions, which is the best conductor of electricity?

L i^{+}

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N a^{+}

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K^{+}

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C s^{+}

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Solution

The correct option is D $C s^{+}$
$C s^{+}$ is least hydrated due to bigger in size. So, it moves rapidly in aqueous solution and best conductor of electricity.
So, the correct answer is 'Cs^+'.

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Similar questions

L i^{+} < N a^{+} < K^{+} < R b^{+} < C s^{+}

Comment on each of the following observations:

(a) The mobilities of the alkali metal ions in aqueous solution are Li⁺ < Na⁺ < K⁺< Rb⁺ < Cs⁺

(b) Lithium is the only alkali metal to form a nitride directly.

L i^{+} < N a^{+} < K^{+} < R b^{+} < C s^{+}

E^{⊖}

M^{2 +} (a q) + 2 e^{-} \to M (s)

M = C a, S r

B a

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