which of the following is not the characteristic of ionic solids?

Options

A. Very low value of electrical conductivity in the molten state
B. Brittle strong forces of interactions
C. Very strong forces of interactons
D. Anisotropic nature

Explanation

To determine which of the following is not a characteristic of ionic solids, we can analyze each option provided:

1. **Very low value of electrical conductivity in the molten state**: Ionic solids are known to conduct electricity when they are melted (in the molten state) because the ions are free to move. Therefore, this statement is incorrect regarding ionic solids, as they actually have high electrical conductivity in the molten state.

2. **Brittle forces of interactions**: Ionic solids are typically brittle due to the strong electrostatic forces between the oppositely charged ions. When stress is applied, these solids tend to shatter rather than deform. This statement is true for ionic solids.

3. **Very strong forces of interactions among the ionic solids**: The forces of attraction between ions in ionic solids are indeed very strong due to the electrostatic interactions. This characteristic is true for ionic solids.

4. **Anisotropic nature**: Ionic solids can exhibit anisotropic properties, meaning their physical properties can vary depending on the direction in which they are measured. This statement is also true for ionic solids.

Now, summarizing the analysis:

- Option 1 is not a characteristic of ionic solids because they have high electrical conductivity in the molten state.
- Options 2, 3, and 4 are characteristics of ionic solids.

Thus, the answer is **Option 1**.