Which of the following has the minimum flocculation value for a positively charged sol?

The white of an egg is partly coagulated by heating,which can be converted back into a colloidal sol by adding some pepsin and a little $HCl$. This process is called:

Which of the following can stabilize gold sol from coagulation by $NaCl$ solution?

Given below are two statements:
Statement $I :$ Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.
Statement $II :$ For stabilisation of an emulsion,excess of electrolyte is added.
In the light of the above statements,choose the most appropriate answer from the options given below:

In a multimolecular colloidal sol,the atoms or molecules are held together by which forces?

The correct statements about the properties of colloidal solutions are:
$A$. Tyndall effect is used to distinguish between a colloidal solution and a true solution
$B$. Zeta potential is related to movement of colloidal particles
$C$. Brownian motion in colloidal solution is faster if the viscosity of the solution is very high.
$D$. Brownian motion stabilises the sols