Which description matches gels?

Which description matches gels?

• A. A solution of gases in liquids.
• B. Colloids consisting of liquids spread throughout a solid, such as jelly.
• C. A heterogeneous mixture of solids in a liquid.
• D. A gel with solids dispersed in a liquid.

Answer: (B)

Gels are colloidal systems in which a liquid is dispersed within a solid network, giving a semi‑solid, jelly‑like form. The liquid is trapped and held by a solid framework, so jelly is a classic example. This means the dispersed phase is liquid and the continuous phase is solid, which is exactly what the description says. The other scenarios describe gas in liquid, solids in liquid, or a solid dispersed in a liquid, none of which capture the gel structure.

Gels are colloidal systems in which a liquid is dispersed within a solid network, giving a semi‑solid, jelly‑like form. The liquid is trapped and held by a solid framework, so jelly is a classic example. This means the dispersed phase is liquid and the continuous phase is solid, which is exactly what the description says. The other scenarios describe gas in liquid, solids in liquid, or a solid dispersed in a liquid, none of which capture the gel structure.