Section 15.4
Heterogeneous Mixtures
Practice Test
1.
Which one of the following is an example of an emulsion?
a.
mayonnaise
b.
styrofoam
c.
shaving cream
d.
fog
Hint
2.
A suspension is _________.
SC.A.2.4.6
a.
impossible to prepare
b.
a solution
c.
a homogeneous mixture
d.
a heterogeneous mixture
Hint
3.
A colloid contains particles that ____________________.
SC.A.2.4.6
a.
are atomic-size in scale
b.
settle out if left undisturbed
c.
are smaller than atoms
d.
are between 1 nm and 1000 nm in diameter
Hint
4.
The Tyndall effect describes ______________.
SC.A.2.4.6
a.
the scattering of light by colloidal particles
b.
hydrophobic interactions between nonpolar molecules
c.
the adsorption of positive ions onto the surface of a hydrophilic solid
d.
precipitation of colloidal particles using electrically charged plates
Hint
