Substances whose solutions can easily pass through animal membranes are called $......$.

What is the potential difference between the fixed layer and the diffused layer of opposite charges called?

Soap acts as a cleansing agent because ...

The concentration of electrolyte required to coagulate a given amount of $As_2S_3$ sol is minimum in the case of

Which among the following is an example of an emulsion?

Given below are two statements ($S-I$ and $S-II$):
$S-I$: Scattering of light by dispersed particles of a colloidal system is known as the Tyndall effect.
$S-II$: The diameter of the dispersed particles should not be much smaller than the wavelength of the light used.
Choose the most appropriate answer from the options given below.