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

For $As_2S_3$ sol, the most effective coagulating agent is

Gelatin is mostly used in making ice cream in order to

The flocculation value of $HCl$ for arsenic sulphide sol is $30 \; mmol \; L^{-1}$. If $H_{2}SO_{4}$ is used for the flocculation of arsenic sulphide,the amount,in grams,of $H_{2}SO_{4}$ in $250 \; mL$ required for the above purpose is (molecular mass of $H_{2}SO_{4} = 98 \; g/mol$)

The most effective coagulating agent for antimony sulphide sol is

How are colloids classified on the basis of
$(i)$ physical states of components
$(ii)$ nature of dispersed phase and
$(iii)$ interaction between dispersed phase and dispersion medium?