05. SURFACE CHEMISTRY (HM)
Explanation:
$\underset{\begin{smallmatrix}
\text{(Dispersed}\, \\
\,\,\,\,\,\,\,\,\,\text{phase)}
\end{smallmatrix}}{\mathop{\text{Liquid}}}\,\,\,\,+\,\,\,\underset{\begin{smallmatrix}
\text{(Dispersion}\, \\
\,\,\,\,\,\text{medium}
\end{smallmatrix}}{\mathop{\text{Solid}}}\,=\underset{\text{(Colloid)}}{\mathop{\text{Gel}}}\,$(e.g. Butter)