Water and Its Solutions
Practice Test
1.
The elements in Groups 1, 2, and 13-17 are called the _____________.
a.
transition elements
b.
alkali metals
c.
main group elements
d.
noble gases
2.
The empirical formula for a compound is CH and its molar mass is 78 g/mol. What is the compound's molecular formula?
a.
C
6
H
6
b.
C
10
H
10
c.
CH
d.
C
3
H
3
3.
A ________________ solution contains more than the usual maximum amount of solute.
a.
concentrated
b.
supersaturated
c.
dilute
d.
saturated
4.
In aqueous solution, H
2
SO
4
is called _______________.
a.
nitric acid
b.
hydrogen sulfur oxide
c.
hydrogen sulfite
d.
sulfuric acid
5.
What is the name of the molecular compound NO
2
?
a.
nitrite
b.
nitrogen dioxide
c.
dinitrogen dioxide
d.
nitrogen dioxygen
6.
H
2
O is sometimes called ________________.
a.
a solution
b.
a poor solvent
c.
a specific solute
d.
the universal solvent
7.
What is the mass of 0.100 mol of sodium chloride?
a.
10.0 g
b.
0 g
c.
0.585 g
d.
0.355 g
8.
An electron in an atom emits energy in the form of light when it ________________.
a.
leaves the atom
b.
leaves the nucleus
c.
falls back to a lower energy level
d.
rises to a new energy level
9.
The constant, random motion of tiny chunks of matter is called _________________.
a.
Brownian motion
b.
linear motion
c.
parabolic trajectory
d.
kinetic motion
10.
Gas particles _______________ kinetic energy when they collide with other particles or the walls of their container.
a.
gain some
b.
lose some
c.
lose no
d.
gain much
11.
Limestone, calcium carbonate, is a strong building material because of the ordered arrangement of __________ in its crystal structure.
a.
ions
b.
atoms
c.
molecules
d.
covalent bonds
12.
Calculate the molarity of 0.75 L of a solution containing 0.83 g of dissolved KCl.
a.
6.2
b.
0.75 M
c.
1.1 M
d.
0.015 M
13.
A shared pair of electrons is called ___________________.
a.
compound
b.
an ionic bond
c.
a covalent bond
d.
an energy level
14.
The two rows beneath the main body of the periodic table contain the _________________.
a.
noble gases
b.
inner transition elements
c.
alkali metals
d.
halogens
15.
These types of compounds make eggshells brittle.
a.
ionic
b.
network
c.
molecular
d.
covalent
16.
The arrangement of electron pairs around each of the two carbon atoms in the ethene molecule, C
2
H
4
, is best described as _________________.
a.
tetrahedral
b.
linear
c.
square planar
d.
trigonal planar
17.
The sum of the charges in an ionic compound must equal ________.
a.
positive one
b.
negative eight
c.
zero
d.
positive eight
18.
Two atoms that share six electrons are said to be joined by a __________ bond.
a.
single
b.
triple
c.
double
d.
hexyl
19.
Ice is ___________ liquid water.
a.
more massive
b.
more fluid
c.
equally as dense as
d.
less dense
20.
If an s sublevel could contain up to three electrons, which element would be the first noble gas?
a.
helium
b.
lithium
c.
carbon
d.
neon
