Answer 1

Ionic compounds	Covalent compounds
These contain electrovalent or ionic bond.	These contain covalent bond.
They are generally crystalline solids.	They are generally volatile liquids or gases.
They have high melting and boiling points.	They have low melting and boiling points.
They are bad conductors of electricity in solid state but are good conductors in the molten or aqueous states.	They do not conduct electricity.
They are generally soluble in water but insoluble in organic solvents.	They are generally soluble in organic solvents but insoluble in water.
They consist of ions. So, their reactions in solutions are fast.	They consist of molecules. So, their reactions in solutions are slow.