Hydration Energy (Group 1)

Q.

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?

1. K
2. Rb
3. Li
4. Na

Q.

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resin follows the order:

1. $L{i}^{+}<K^{+}<N{a}^{+}<R{b}^{+}$

2. $R{b}^{+}<K^{+}<N{a}^{+}<L{i}^{+}$

3. $K^{+}<N{a}^{+}<R{b}^{+}<L{i}^{+}$

4. $N{a}^{+}<L{i}^{+}<K^{+}<R{b}^{+}$

Q. Which of the following has the highest ionic mobility in an aqueous solution?

1. $L{i}^{+}$
2. $R{b}^{+}$
3. $N{a}^{+}$
4. $K^{+}$

Q. Sodium sulphate is soluble in water but barium sulphate is sparingly soluble because:

1. The hydration energy of $N{a}_{2}S{O}_4$ is more than its lattice energy
2. The lattice energy of $BaS{O}_4$ is more than its hydration energy
3. The lattice energy has no role to play in solubility
4. The lattice energy of $N{a}_{2}S{O}_4$ is more than its hydration energy

Q. The mobility of metal ions in an aqueous medium $(L{i}^{⨁},N{a}^{⨁},K^{⨁},R{b}^{⨁})$ in an electric field, follows the order:

1. $L{i}^{⨁}>N{a}^{⨁}>K^{⨁}>R{b}^{⨁}$
2. $R{b}^{⨁}>N{a}^{⨁}=K^{⨁}>L{i}^{⨁}$
3. $L{i}^{⨁}<N{a}^{⨁}<K^{⨁}<R{b}^{⨁}$
4. $N{a}^{⨁}=K^{⨁}>R{b}^{⨁}>L{i}^{⨁}$

Q. Which of the following has the highest ionic mobility in an aqueous solution?

1. $L{i}^{+}$
2. $R{b}^{+}$
3. $N{a}^{+}$
4. $K^{+}$