Gelatin is an example of which type of colloid?

• A. Sol
• B. Emulsion
• C. Gel
• D. Foam

Answer: (C)

Verified step by step guidance

1. Understand the definition of a colloid: a mixture where one substance is dispersed evenly throughout another, with particle sizes between 1 nm and 1 µm.
2. Identify the types of colloids based on the dispersed phase and dispersion medium: Sol (solid in liquid), Emulsion (liquid in liquid), Gel (liquid dispersed in a solid network), and Foam (gas dispersed in a liquid or solid).
3. Recall that gelatin forms a semi-solid network where liquid is trapped within a solid matrix, which is characteristic of a gel.
4. Compare gelatin's properties to the definitions: since gelatin is a solid network containing liquid, it fits the description of a gel colloid.
5. Conclude that gelatin is an example of a gel type colloid.