Chemistry: Matter and Change

Section 1: Heterogeneous and Homogeneous Mixtures

Self Check Quizzes

1
A suspension is _________.
A)a heterogeneous mixture
B)a homogeneous mixture
C)a solution
D)impossible to prepare
2
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
3
In the diagram, the large spheres represent the colloid particles. What do the small spheres represent?

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A)electrons
B)the dispersing medium particles
C)protons
D)the thixotropic particles
4
What is the solvent in the solution we call air?
A)oxygen
B)carbon dioxide
C)nitrogen
D)water vapor
5
Brownian motion describes __________.
A)erratic movement of colloid particles caused by collisions with particles of the dispersion medium
B)erratic movements of pollen grains caused by a living force within the pollen
C)random motion of colloid particles caused by Heisenberg's Uncertainty Principle
D)random motion of colloid particles that causes the particles to settle out of the mixture
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