Single Choice

Size of hydrated ion of $$Li^+ and Be^{2+} $$ is :

A$$Li^{+}\, <\, Be^{2+}$$
Correct Answer
B$$Li^{+}\, >\, Be^{2+}$$
C$$Li^{+}\, = \, Be^{2+}$$
DNone of these

Solution

The hydration energies of alkali metal ions decrease with increase in ionic size. The size of alkali metal ions in aqueous solution(hydrated ion) is in the following order $$Cs^{+}\, <\, Rb^{+}\, <\, K^{+}\, <\, Na^{+}\, <\, Li^{+}$$
so as the size of the ion increases the hydrated ion size decreases.
So the correct order $$Li^{+}\, <\, Be^{2+}$$ Hence, option A is correct,

SIMILAR QUESTIONS

s - block Elements (Alkali and Alkaline Earth Metals)

The lightest metal among the following is:

s - block Elements (Alkali and Alkaline Earth Metals)

Compare the solubility and thermal stability of alkali metals carbonates with those of the alkaline earth metals nitrates.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following oxides is most acidic in nature?

s - block Elements (Alkali and Alkaline Earth Metals)

The correct order of solubility of the following compound in water is:

s - block Elements (Alkali and Alkaline Earth Metals)

Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates, (b) Carbonates, (c) Sulphates.

s - block Elements (Alkali and Alkaline Earth Metals)

The hydroxides and carbonates of sodium and potassium are easily soluble in water while the corresponding salts of magnesium and calcium are sparingly soluble in water. Explain?

s - block Elements (Alkali and Alkaline Earth Metals)

$$CaCl_2$$ is preferred over $$NaCl$$ for clearing ice on roads on particularly in very cold countries. This is because:

s - block Elements (Alkali and Alkaline Earth Metals)

Alkaline earth metals are better reducing agents than alkali metals.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following groups of elements have chemical properties that are most similar :

s - block Elements (Alkali and Alkaline Earth Metals)

If $$X$$ and $$Y$$ are the second ionisation potentials of alkali and alkaline earth metals of same period, then :

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