What is an example of colloid?
Butter is one. See the following weblink for more info: http://en.wikipedia.org/wiki/Colloid
Milk, gel and styrofoam are colloids as well
A colloid is actually a heterogeneous mixture. HETEROGENEOUS MIXTURE- Heterogeneous mixture means the mixture in which the particles are not uniformly mixed with each other. In a colloid the particles are very very minute and so are not visible to our eyes. For example milk is colloid. So according to me colloid mixture appears to be a homogeneous mixture but actually it is a heterogeneous mixture.