What is formed when a lyophilic sol is added to an emulsion?

Albumin has a gold number of $0.09$. What is the minimum amount of albumin (in $mg$) required to protect the coagulation of $40 \ mL$ of gold sol from $4 \ mL$ of $10 \% \ NaCl$ solution?

Gold sol is not a

The volume of a colloidal particle,$V_C$,as compared to the volume of a solute particle in a true solution,$V_S$,could be:

The coagulating power of electrolytes having ions $Na^{+}$, $Al^{3+}$, and $Ba^{2+}$ for $As_{2}S_{3}$ sol increases in the order

Which of the following statements is true for a lyophobic sol?