Which phenomenon is used to distinguish colloids from true solutions?

Solvent hating colloids are :

Colloidal solution commonly used in treatment of eye disease is :

For the coagulation of a positive sol, arrange the following anions in increasing order of their flocculating power: $PO_4^{3-}$, $SO_4^{2-}$, $Cl^{-}$

The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively. Which of the following statements is not correct?

Colloidal solution of arsenioussulphide can be prepared by :

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of ${\rm{A}}{{\rm{s}}_{\rm{2}}}{{\rm{S}}_{\rm{3}}}$ are given belowI) ${\rm{(}}NaCl{\rm{)}}\,{\rm{ = }}\,{\rm{5.2}}$ II) ${\rm{(}}BaC{l_2}{\rm{)}}\,{\rm{ = }}\,0.69$ III) ${\rm{(}}MgS{O_4}{\rm{)}}\,{\rm{ = }}\,0.22$ The correct order of their coagulating power is

The capacity of an ion to coagulate a colloidal solution depends on :

Which is not a colloidal solution of a liquid in another liquid?

The concentration of electrolyte required to coagulate a given amount of ${\rm{A}}{{\rm{s}}_2}{{\rm{S}}_3}$ sol is minimum in the case of

Which has least gold number?