Which of the following statements are true about peptization? A. A colloidal sol is converted into precipitate B. It is done in the presence of a small electrolyte C. Charges develop on the precipitate during this process D. The charges developed during this process further breaks up into smaller particles of the size of colloids.

Which of the following properties of colloids involve scattering of lights?

The volume of colloidal particle $V_c$ as comapred to the volume of solute particle in a true solution $V_s$ could be

Zeta potential ( or electrokinetic potential ) is the

${10}^{-4}$ g of gelatin is required to be added to 100 $c{m}^3$ of a stanadard gold solution to just prevent its precipitation by addition of 1 $c{m}^3$ of 10% NaCl solution to it. Hence, gold number of gelatin is?

Which of the following does not affect the Brownian movement:

Arrange the following in the decreasing order of their coagulation power: $A{l}^{3+},N{a}^{+},C{a}^{2+}$ 

Ferric chloride is added to stop bleeding because

Milk can be preserved by adding a few drops of

Silver iodide is used in bringing about artificial rain because silver iodide