Colloids and Mixtures Concepts

What type of mixture falls between homogeneous and heterogeneous mixtures?

• Solution

• Suspension

• Colloid

• Compound

Which characteristic describes a homogeneous mixture?

• Its parts do not dissolve.

• Its particles are large enough to be seen.

• It has a uniform appearance and its particles do not settle out.

• Its parts always settle out over time.

What is a key characteristic of a heterogeneous mixture?

• Its particles are too tiny to see.

• It looks like one substance.

• Its parts may suspend for a moment but always settle out.

• It is also known as a solution.

Which of the following is an example of a colloid?

• Sugar dissolved in water

• Sand in water

• Rain

• Fog

What are the two main parts of a colloid?

• Solute and solvent

• Dispersed substance and dispersion medium

• Atoms and molecules

• Solid and liquid

What is the primary role of an emulsifying agent in forming an emulsion?

• To increase the density of the liquids.

• To cause one liquid to settle below the other.

• To interact with both immiscible liquids and stabilize them into a colloid.

• To evaporate one of the liquids.

Which phenomenon describes the scattering of light by dispersed particles in a colloid?

• Refraction

• Tyndall Effect

• Absorption

• Dispersion

How do colloids behave when subjected to filtration?

• Their particles are retained on the filter paper.

• Their particles pass through the filter paper.

• They separate into distinct layers.

• They evaporate completely.