Question

Ionic compounds do not conduct electricity in solid state. Identify the correct reason.

• A. Absence of oppositely charged ions in solid state
• B. Absence of mobile ions in solid state
• C. Absence of forces of attraction between ions in solid state
• D. Absence of free electrons in solid state

Answer 1

The correct option is B Absence of mobile ions in solid state

Ions in an ionic lattice are fixed at their positions and can only oscillate about their mean positions. Hence, in the solid state, the ions are not free to move. While in molten form, these ions can freely move in the solution which also allows the passage of electricity. The right reason is the absence of mobile ions in the solid state.