Among the following the false statement is :
(1) Latex is a colloidal solution of rubber particles which are positively charged.
(2) Tyndall effect can be used to distinguish between a colloidal solution and a true solution.
(3) Lyophilic sol can be coagulated by adding an electrolyte.
(4) It is possible to cause artificial rain by throwing electrified sand carrying charge opposite to the one on clouds from an aeroplane.
