Behavior of Gases
Practice Test
1.
Adding reactants causes an equilbrium to ______________.
a.
shift to the right
b.
shift in both directions simultaneously
c.
shift to the left
d.
remain unchanged
2.
These elements commonly have more than one positive oxidation number.
a.
noble gases
b.
alkaline earths
c.
alkali metals
d.
transition elements
3.
In the combined gas law, the _________________ is held constant.
a.
temperature
b.
pressure
c.
volume
d.
number of gas particles
4.
Which of the following is the formula for nitric acid?
a.
HNO2
b.
HNO
c.
HNO3
d.
HN
5.
A soda straw functions as __________________ the liquid up the straw.
a.
reduced pressure draws
b.
sucking draws
c.
air pressure pulls
d.
air pressure pushes
6.
The positive and negative portions of two ionic compounds are interchanged in this type of reaction.
a.
decomposition
b.
single displacement
c.
double displacement
d.
synthesis
7.
Because liquid molecules are much closer than gas molecules, liquids are much less ____________ than gases.
a.
lattice-like
b.
massive
c.
flexible
d.
compressible
8.
The formulas O
2
, P
4
, and S
8
show that oxygen, phosphorus, and sulfur are _______________.
a.
molecular elements
b.
hydrates
c.
diatomic
d.
ionic elements
9.
Activation energy is the energy required to _________________.
a.
initiate a reaction
b.
slow down a reaction
c.
stop a reaction
d.
speed up a reaction
10.
What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg?
a.
3.4 x 10 -34 m
b.
34 m
c.
1.3 x 10 -38 m
d.
3.4 x 10 -38 m
11.
Lavoisier came to the conclusion that air is a mixture made up mostly of these two gases.
a.
oxygen and carbon dioxide
b.
nitrogen and oxygen
c.
oxygen and methane
d.
hydrogen and oxygen
12.
A reaction between magnesium chloride and silver nitrate yields magnesium nitrate and silver chloride. What is the coefficient for magnesium nitrate in the balanced equation for the reaction?
a.
3
b.
1
c.
4
d.
2
13.
Diatomic oxygen and ozone are _____________.
a.
allotropes
b.
different elements
c.
ionic
d.
isotopes
14.
A description of a chemical reaction that includes the names of all reactants and products, but not the formulas, is called a ___________________.
a.
chemical equation
b.
word equation
c.
balanced equation
d.
skeleton equation
15.
Gas particles _______________ kinetic energy when they collide with other particles or the walls of their container.
a.
lose some
b.
lose no
c.
gain much
d.
gain some
16.
Suppose that a tire pressure gauge reads 32.1 lb/in
2
. If 14.7 lb/in
2
equals 101 300 Pa, what is the pressure in kPa?
a.
221 kPa
b.
2.18 kPa
c.
.0422 kPa
d.
1000 kPa
17.
____________ is the pressure that supports a 760-mm column of mercury.
a.
One lb/in
2
b.
One meter
c.
One atmosphere
d.
One pascal
18.
The constant, random motion of tiny chunks of matter is called _________________.
a.
linear motion
b.
Brownian motion
c.
kinetic motion
d.
parabolic trajectory
19.
At the same temperature, a steam burn may be more severe than a water burn because of water's high _______________________.
a.
mass
b.
density
c.
heat of vaporization
d.
polarity
20.
Which of the following single-replacement reactions will occur?
a.
Cl2(g) + HBr(aq) [arrow]
b.
Cu(s) + ZnCl2(aq) [arrow]
c.
Au(s) + Cu(NO3)2 (aq) [arrow]
d.
Br2(g) + HF(aq) [arrow]
