Which of the following statements is not true for ionic compounds ?

Options

A. High melting point
B. Less lattice energy
C. Less solubility in organic compounds
D. Soluble in water

Answer

To determine which statement is not true for ionic compounds, we will analyze the properties of ionic compounds based on the provided options.

### Step-by-Step Solution:

1. **Understanding Ionic Compounds**: Ionic compounds are formed by the electrostatic attraction between cations (positively charged ions) and anions (negatively charged ions). This strong attraction leads to the formation of stable compounds.

2. **High Melting Point**: Ionic compounds generally have high melting points due to the strong electrostatic forces of attraction between the ions. This means a significant amount of energy is required to break these forces. Therefore, the statement regarding high melting points is true.

3. **Lattice Energy**: Lattice energy is the energy required to separate one mole of an ionic solid into its gaseous ions. It is a measure of the strength of the forces between the ions in an ionic compound. Stronger ionic bonds result in higher lattice energy. If a statement claims that ionic compounds have less lattice energy, it contradicts the established understanding of ionic bonds. Hence, this statement is false.

4. **Solubility in Organic Compounds**: Ionic compounds are typically polar due to the presence of charged ions. Most organic compounds are non-polar. According to the principle "like dissolves like," ionic compounds will have less solubility in non-polar organic solvents. This statement is true.

5. **Solubility in Water**: Ionic compounds are soluble in water, which is a polar solvent. The polar nature of water allows it to interact with the charged ions, facilitating their dissolution. Therefore, this statement is also true.

6. **Conclusion**: Among the statements analyzed, the one that is not true for ionic compounds is the one that states they have less lattice energy.

### Final Answer:
The statement that is not true for ionic compounds is: **"less lattice energy."**

---