Among the following the false statement is -
Show Hint
- Lyophilic sol can be coagulated by adding an electrote
- 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
The Correct Option is D
Solution and Explanation
(2) The Tyndall effect (scattering of light by colloidal particles) is shown by colloids and not by true solutions - true.
(3) Charged sand particles thrown from an aeroplane neutralise the charge on cloud droplets and cause artificial rain - true.
(4) Latex is a negatively charged colloidal sol of rubber particles, not positively charged - this statement is false.
Answer: (4) Latex is a colloidal solution of rubber particles which are positively charged
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