Question

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

• A. Solubility in water
• B. Electrical conductivity in solid state
• C. High melting and boiling points
• D. Electrical conductivity in molten state

Answer 1

The correct option is B Electrical conductivity in solid state

Ionic compounds such as $NaCl$ have high melting point and high boiling point.

They are generally soluble in water than other organic solvents since water being polar covalent in nature breaks the ionic bonds.

Ionic compounds are good conductors of electricity in their molten state but not in their solid-state.

Reason :

Ionic compounds are formed due to the transfer of one or more electrons from one atom to the other and these ions possess more attractive force when compared to their repulsive forces.

The ions arrange in such a way that they possess minimum potential energy giving a crystalline structure.

Thus, the ions are unable to migrate and cannot conduct electricity.

Hence the correct option is B.