Section 15.4
Heterogeneous Mixtures
Practice Test
1.
A suspension is _________.
a.
a heterogeneous mixture
b.
a homogeneous mixture
c.
a solution
d.
impossible to prepare
Hint
2.
A colloid contains particles that ____________________.
a.
are smaller than atoms
b.
are between 1 nm and 1000 nm in diameter
c.
settle out if left undisturbed
d.
are atomic-size in scale
Hint
3.
The Tyndall effect describes ______________.
a.
precipitation of colloidal particles using electrically charged plates
b.
the adsorption of positive ions onto the surface of a hydrophilic solid
c.
hydrophobic interactions between nonpolar molecules
d.
the scattering of light by colloidal particles
Hint
4.
Which one of the following is an example of an emulsion?
a.
shaving cream
b.
fog
c.
mayonnaise
d.
styrofoam
Hint
