Match the following columns.
 

	Column I		Column II
A.	Ionic solids	1	Giant molecules
B.	Network solids	2	Volatile liquids or soft solids at room temperature
C.	Metallic solids	3	No free ions to move in solid state
D.	Hydrogen bonded molecular solid	4	Positive ions surrounded by sea of electrons.

In ionic solids, strong coulombic forces binds the ions together, so they are not free to move. However, in aqueous state or in molten state, these forces get weaker or and ions get free to move so they can conduct electricity. 
Network solids are in fact giant molecules due to their large three dimensional structure. In metallic solids, positive ions are surrounded by the sea of electrons.
Hydrogen bonded molecular solids may be volatile liquids or soft solids at room temperature.