[amp_mcq option1=”Gel” option2=”Emulsion” option3=”Sol” option4=”Precipitate” correct=”option2″]
The correct answer is: B. Emulsion
An emulsion is a colloidal system in which one liquid is dispersed in another liquid. The two liquids are immiscible, meaning they do not mix together. The dispersed liquid is called the internal phase, and the continuous liquid is called the external phase. Emulsions are stabilized by surfactants, which are molecules that have both water-loving and oil-loving ends. The surfactants form a layer around the droplets of the internal phase, preventing them from coming together and forming larger droplets.
Gels are colloidal systems in which a solid is dispersed in a liquid. The solid particles are very small, and they are evenly distributed throughout the liquid. The solid particles prevent the liquid from flowing, and the gel has a solid-like consistency.
Sols are colloidal systems in which a solid is dispersed in a liquid. The solid particles are larger than the particles in a gel, and they are not evenly distributed throughout the liquid. The solid particles can settle out of the sol, and the sol has a cloudy appearance.
Precipitate is a solid that forms when two solutions are mixed together. The precipitate is formed when the ions in the two solutions react to form a solid compound. The precipitate can be removed from the solution by filtration or centrifugation.