Question

Particle size in colloids ranges from:

• A. 1 nm - 1000 nm
• B. less than 1 nm
• C. greater than 1000 nm
• D. 10 nm - 1100 nm

Answer 1

The correct option is A 1 nm - 1000 nm

Colloids are heterogeneous mixtures containing a dispersed phase mixed in a dispersion medium. Its particles are so tiny and have a size of the range 1 nm - 1000 nm.

Because of this, they are not visible to our naked eyes and hence, colloids appear to be homogeneous.