Question

Crystalline sodium chloride is a bad conductor of electricity while molten NaCl and its aqueous solution conduct electricity. This is because.

• A. Crystalline sodium chloride contains molecules only
• B. The ions present in it are not free to move in solid state.
• C. Sodium chloride is a covalent crystal]
• D. Solid substances do not conduct electricity.

Answer 1

Answer: (B)

The ions present in it are not free to move in solid state.

Answer 2

: $Na^{+}$ and $Cl^{-}$ ions are free to move only in molten state or aqueous solution.