Which of the following ionic species has largest size?

R b^{+} (a q)

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L i^{+} (a q)

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N a^{+} (a q)

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K^{+} (a q)

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Solution

The correct option is B $L i^{+} (a q)$
We know that, down the group atomic size increases. Li⁺ is the smallest ion hence it gets heavily hydrated which then makes Li⁺(aq) the largest cation among the given ionic species.

Thus, option B is correct.

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Similar questions

ionic species having largest size:

A. Li+(g)

B.Na+ (aq)

C. Rb+(aq)

D. Li+(aq)

{C s}_{a q}^{+} < {R b}_{a q}^{+} < K_{a q}^{+} < {N a}_{a q}^{+}

N a_{(a q)}^{+}

K_{(a q)}^{+}

r_{N a^{+} (a q)} > r_{k^{+} (a q)}

H C l (a q) + H_{2} O (a q) ⇌ H_{3} O^{+} (a q) + C l^{-} (a q)

N H_{3} (a q) + H_{2} O (a q) ⇌ N H_{4}^{+} (a q) + O H^{-} (a q)

H C l (a q) + H_{2} O (a q) ⇌ H_{3} O^{+} (a q) + C l^{-} (a q)

N H_{3} (a q) + H_{2} O (a q) ⇌ N H_{4}^{+} (a q) + O H^{-} (a q)

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