Surface Chemistry

goals
$Fe(OH)_3$ sol is :
The emulsifying agent forms an interfacial film between suspended particles and the medium. The principal emulsifying agents for $O/W$ emulsions are?
The emulsifying agent forms an interfacial film between suspended particles and the medium. The principal emulsifying agents for $O/W$ emulsions are?
Adsorption is the presence of excess concentration of any particular component at the surface of liquid or solid phase as compared to bulk. This is due to presence of residual forces at the surface of body. In the adsorption of hydrogen gas over a sample of charcoal, $1.12$ $cm^3$ of $H_2$(g) measured over S.T.P. was found to adsorb per gram of charcoal. Consider only monolayer adsorption. Density of $H_2$ is $0.07$ g/cc.
In another experiment, same $1$ gram charcoal adsorbs $100$ ml of $0.5$ M $CH_3COOH$ to form monolayer and thereby the molarity of $CH_3COOH$ reduces to $0.49$.
Consider the following sequence of reaction:
[Red Hot Coke$+$Steam]  $\xrightarrow {\displaystyle \text{y}{(\text{catalyst})}}$ X $\rightarrow$ Y $+$ Z $\xrightarrow [\displaystyle \text{cold water}]{\displaystyle \text{pressure}}$W(gas)