Question

Sodium chloride has a crystalline structure made up of $N{a}^{+}$ and $C{l}^{-}$ ions. Why does $NaCl$ not conduct electricity in solid state?

• A. Solids do not conduct electricity
• B. The ions of $NaCl$ become mobile only in molten state and are not free to move in solid state
• C. The crystalline structure does not have ions.
• D. When a bond is formed between ions they lose their charges

Answer 1

Answer: (B)

Due to electrostatic force of attraction, the ions do not move when electric current is applied in solid state. The ions become mobile when melted or dissolved in a polar solvent and conduct electricity.