The Schulze-Hardy rule states that the greater the valency of the flocculating ion added, the greater its power to cause precipitation. Which of the following would be the MOST effective in coagulating a negatively charged arsenic sulfide ($As_2S_3$) sol?

Emulsions can be destroyed by

The coagulation values in millimoles per litre for the electrolytes NaCl, BaCl2, and AlCl3 used for the coagulation of a negatively charged sol are 52, 0.69, and 0.093 respectively. Arrange these electrolytes in the increasing order of their coagulating power.

Which is the wrong pair?

(i) Starch solution : sol (ii) Aq. NaCl : true solution (iii) milk : emulsion (iv) Aq. ${\rm{BaS}}{{\rm{O}}_4}$ : true solution

Which of the following statements is incorrect regarding the coagulation power of ions?

The formation of colloid from suspension is

An example of dispersion of a liquid in a gas is

Which is not shown by sols?

In a stable colloidal solution, the zeta potential is expected to be:

Addition of ${\rm{FeC}}{{\rm{l}}_3}$ to ${{\rm{K}}_4}\left[ {{\rm{Fe}}{{\left( {{\rm{CN}}} \right)}_6}} \right]$ in dilute and cold solution gives :

Which of the following is not the property of hydrophilic sol.?