Question

Which characteristic is true with respect to colloids?

• A. They always have two phases.
• B. They are only in liquid state.
• C. They can’t be electrolysed.
• D. They are only hydrophilic.

Answer 1

The correct option is A

They always have two phases.

Colloids have two phases. They are dispersion medium and the dispersed phase. There are different types of colloids: gas in solid, gas in liquid, solid in liquid, solid in gas, liquid in solid etc. They are quite stable, and so the dispersed phases particles do not sediment.