In a colloid, what are the two phases called?

In a colloid, what are the two phases called?

• A. Sol and gel
• B. Gas and liquid
• C. Liquid and solid
• D. Plasma and solid

Answer: (A)

In a colloidal system, the two common forms you’ll hear about are sol and gel. A sol is when solid particles are dispersed throughout a liquid, like fine particles floating in water. A gel is when a liquid is held within a solid, three‑dimensional network, giving a jelly-like structure. These two forms describe how the same basic idea—tiny particles dispersed in another material—can manifest in different ways. So, sol and gel are the two names used for the colloidal forms. The other options describe general states of matter that aren’t the typical pair used to name colloids.

In a colloidal system, the two common forms you’ll hear about are sol and gel. A sol is when solid particles are dispersed throughout a liquid, like fine particles floating in water. A gel is when a liquid is held within a solid, three‑dimensional network, giving a jelly-like structure. These two forms describe how the same basic idea—tiny particles dispersed in another material—can manifest in different ways.

So, sol and gel are the two names used for the colloidal forms. The other options describe general states of matter that aren’t the typical pair used to name colloids.