Question:

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