Q.

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

1 Solubility in water
 
2 Electrical conductivity in solid state  
3 High melting and boiling points  
4 Electrical conductivity in molten state  

Ans.

(2)

Ionic compounds conduct electricity in aqueous solution or molten state. In solid state, they are non-conductors of electricity because of the absence of free ions.