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