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Test Description: Solutions
Instructions: Answer all questions to get your test result.
1) Which of the following is an electrolyte?
A
sodium chloride
B
pure water
C
glass
D
sugar
2) A substance whose water solution is a good conductor of electricity is a(n)
A
nonpolar substance
B
solute
C
nonelectrolyte
D
electrolyte
3) All of the following are homogeneous mixtures except
A
a sugar-water solution
B
gasoline
C
soil
D
a salt-water solution
4) Sugar dissolved in water is an example of which solute-solvent combination?
A
gas-liquid
B
solid-liquid
C
liquid-solid
D
liquid-liquid
5) The Tyndall effect is used to distinguish between
A
electrolytes and nonelectrolytes
B
liquids and gases.
C
solutions and colloids
D
solvents and solutes
6) Stirring increases the rate of dissolution because it
A
lowers the temperature
B
brings fresh solvent into contact with the solute
C
decreases the surface area of the solute
D
raises the temperature
7) Which mixture contains particles that are in a dispersed phase and do not settle out?
A
a colloid
B
a solution
C
a suspension
D
a homogeneous mixture
8) Increasing the surface area of the solute
A
can increase, decrease, or have no effect on the rate of dissolution
B
increases the rate of dissolution
C
has no effect on the rate of dissolution
D
decreases the rate of dissolution
9) A heterogeneous mixture always contains
A
only one substance
B
more than two substances
C
two or more substances that are not visibly distinguishable
D
two or more substances that are visibly distinguishable
10) Which is not an example of a colloid?
A
paint
B
sugar water
C
butter
D
smoke
*select an answer for all questions
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