The colloidal solution of gelatin is known as:

Select the incorrect statement.

At the isoelectric point,the concentration of $H^+$ ions in colloidal particles is such that the particles:

$100 \; mL$ of $5 \% \; (w/v)$ solution of $NaCl$ in water was prepared in a $250 \; mL$ beaker. Albumin from the egg was poured into the $NaCl$ solution and stirred well. This resulted in a/an:

Tyndall effect is observed only when:
$(i)$ the diameter of the dispersed particles is not much smaller than the wavelength of the light used.
$(ii)$ the refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.
$(iii)$ the size of the particles is generally between $10^{-11} \ m$ and $10^{-9} \ m$ in diameter.
$(iv)$ the dispersed phase and the dispersion medium can be seen separately in the system.

The colloidal solution used to treat stomach disorders is