All colloidal solutions exhibit .......

What type of colloid is the soap lather?

Which of the following is a lyophobic colloidal solution?

Choose the correct reason$(s)$ for the stability of the lyophobic colloidal particles.
$(A)$ Preferential adsorption of ions on their surface from the solution.
$(B)$ Preferential adsorption of solvent on their surface from the solution.
$(C)$ Attraction between different particles having opposite charges on their surface.
$(D)$ Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal particles.

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

Which of the following is a water-in-oil $(W/O)$ type of emulsion?