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Among the following the false statement is -

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

Correct answer: Latex is a colloidal solution of rubber particles which are positively charged

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