Lattice Energy

Q. Ionic compounds having a higher lattice energy than solvation energy are readily soluble

1. True
2. False

Q. Which of the following alkaline earth metal sulphates has its hydration energy greater than its lattice energy?

1. $BaS{O}_4$
2. $SrS{O}_4$
3. $BeS{O}_4$
4. $CaS{O}_4$

Q. For two ionic compounds XY and AB, the data of their lattice energy and hydration energy is given as:
$\begin{array}{ccc}\text{Compound}& \text{Lattice energy (kJ/mol)}& \text{Hydration energy(kJ/mol)}\\ XY& 400& 1000\\ AB& 600& 2000\end{array}$
What will be the correct order of solubility in water?

1. AB > XY
2. XY > AB
3. XY = AB
4. Can't be predicted

Q. The order of solubility in water for sodium phosphate, sodium sulphate and sodium chloride is:

1. sulphate > phosphate > chloride
2. chloride > sulphate > phosphate
3. chloride > phosphate > sulphate
4. phosphate > chloride > sulphate

Q.

Property of the alkaline earth metals that increases with their atomic number:

1. Ionization energy

2. Solubility of their sulphates in water

3. Electronegativity

4. Solubility of their hydroxides in water

Q.

Property of the alkaline earth metals that increases with their atomic number:

1. Solubility of their hydroxides in water

2. Solubility of their sulphates in water

3. Ionization energy

4. Electronegativity

Q.

Which compound will show the highest lattice energy?

1. RbF

2. CsF

3. KF

4. NaF

Q. Select the incorrect stattement(s):

1. Lattice energy $\propto \frac{1}{r^2}$. {where r is the interionic distance}
2. Lattice energy $\propto q_1{q}_2$. {where $q_1$ and $q_2$ are the charges of co-ions}
3. Ionic mobility of the ions in aqueous state $\propto \frac{1}{radiusofionsingaseousstate}$
4. Heat of formation of a compound depends on the number of steps involved in its formation reaction

Q. Which of the following compound has the highest lattice energy?

1. $NaCl$
2. $CaO$
3. $KCl$
4. $MgO$

Q. Assertion: Lattice energy of $CaO$ is higher than that of $NaCl$.

Reason: The lattice energy of an ionic compund is directly proportional to the product of the charges of ions.

1. Both the assertion and the reason are true but the reason is not the correct explanation of the assertion
2. The assertion is true but the reason is false
3. Both the assertion and the reason are true and the reason is the correct explanation of the assertion
4. Both the assertion and the reason are false