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Which of the following option is correct regarding ${Li}^{+}$ and ${Be}^{2 +}$ ?

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Size of ${Li}^{+} < {Be}^{2 +}$

Hydration energy of ${Li}^{+}$ and ${Be}^{2 +}$ are equal

${Li}^{+}$ and ${Be}^{2 +}$ having same molar conductivity in aqueous solution

Size of ${Li}^{+} > {Be}^{2 +}$

answer is D.

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Detailed Solution

Beryllium atom's nucleus will exert more stress on the outermost electrons, thus compressing the space between itself and electrons. Therefore, Lithium has a bigger atomic radius than beryllium. Thus,

Size of ${Li}^{+} > {Be}^{2 +}$

Hence, the correct option is D.

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