Question

Which one of the following property is generally not exhibited by ionic compounds?

Options

• solubility in water.

• electrical conductivity in solid state.

• high melting and boiling points.

• electrical conductivity in molten state.

Answer 1

Electrical conductivity in solid state.

Explanation:

In the solid state, the constituent positive and negative ions are tightly held together in a fixed crystal lattice structure by strong electrostatic forces. Because these ions are locked in place and cannot move freely, they are unable to carry an electric current. Ionic compounds only become good conductors when they are melted (molten) or dissolved in water, which breaks the rigid structure and allows the charged ions to move freely.