Solutions
Practice Test
1.
__________ are compounds that form charged particles.
a.
Nonpolar components
b.
Nonelectrolytes
c.
Ions
d.
Electrolytes
Hint
2.
Which of the following increases rate of evaporation?
a.
increasing attraction between solvent molecules
b.
combining polar solvents with polar solutes
c.
decreasing attraction between solvent molecules
d.
decreasing surrounding temperature
Hint
3.
A __________ is a large molecule made of carbon and hydrogen atoms.
a.
hydrogen oxide
b.
hydrocarbon
c.
solute
d.
solvent
Hint
4.
Because electrons are distributed equally, a hydrocarbon is __________ .
a.
polar
b.
insoluble
c.
nonpolar
d.
nontoxic
Hint
5.
Which of the following statements is true?
a.
Nonpolar solvents are useful for dissolving polar solutes.
b.
Polar solvents are useful for dissolving nonpolar solutes.
c.
Nonpolar solvents are useful for dissolving nonpolar solutes.
d.
Nonpolar solvents are not useful because they do not form solutions with water.
Hint
6.
Air contains 78 percent nitrogen, 21 percent oxygen, and one percent argon. Which gas is the solvent?
a.
oxygen
b.
none of the answers are correct
c.
argon
d.
nitrogen
Hint
7.
Which attribute enables water molecules to dissolve sugar?
a.
stationary nature of water molecules
b.
liquid state of the solute
c.
nonpolarity of water
d.
electrical charge
Hint
8.
What characteristic of water makes it the universal solvent?
a.
polar
b.
long-chain hydrocarbon
c.
large molecules
d.
nonpolar
Hint
9.
Sterling silver contains 92.5 percent silver and 7.5 percent copper. Which substance is the solute?
a.
silver
b.
Solids do not form solutions.
c.
platinum
d.
copper
Hint
10.
Which of the following is a solution?
a.
milk
b.
muddy water
c.
salt water
d.
chlorine
Hint
11.
A __________ is the substance being dissolved in a solution.
a.
solute
b.
insolvent
c.
solvent
d.
substrate
Hint
12.
Why is it dangerous to take large doses of some nonpolar vitamins?
a.
They are water soluble and become concentrated in body tissues.
b.
They are fat soluble and accumulate in body tissues.
c.
These substances cannot be utilized by the body.
d.
They cannot dissolve in fat and instead dissolve in the water inside body cells.
Hint
13.
A solution that contains all the solute it can hold at a given temperature is __________ .
a.
saturated
b.
soluble
c.
supersaturated
d.
unsaturated
Hint
14.
Vitamin C is a(n) __________ compound and dissolves readily in water.
a.
nonpolar
b.
polar
c.
oily
d.
fat soluble
Hint
15.
Substances that do not ionize in water and cannot conduct electricity are called __________ .
a.
electrolytes
b.
nonions
c.
nonelectrolytes
d.
dissociated
Hint
16.
A mixture that appears to have the same composition, color, and density and is mixed at the molecular level is called a(n) __________ .
a.
solution
b.
suspension
c.
heterogeneous mixture
d.
element
Hint
17.
The process in which water molecules draw ions away from a crystalline solid and into solution is ___________.
a.
nonpolarization
b.
dissociation
c.
concentration
d.
supersaturation
Hint
18.
Gases are __________ in cooler solvents.
a.
insoluble
b.
precipitates
c.
less soluble
d.
more soluble
Hint
19.
What causes soda to bubble over upon opening?
a.
The carbon dioxide is more soluble.
b.
Gas bubbles are exposed to the surface and come out of solution.
c.
The pressure of the carbon dioxide in the bottle increases.
d.
The temperature inside the bottle is low.
Hint
20.
Adding a solute to a solvent __________ the freezing point of the solvent.
a.
does not change
b.
doubles
c.
lowers
d.
raises
Hint
