Gases
Practice Test
1.
The measure of the average kinetic energy of the particles in a sample of matter is _____.
SC.B.1.4.3
a.
heat
b.
velocity
c.
speed
d.
temperature
2.
Which of the following is the general definition of a solid?
a.
Matter that has a fixed volume and a fixed shape.
b.
Matter that has a fixed volume but no fixed shape.
c.
Matter that has neither a fixed volume nor a fixed shape.
d.
Matter that has a fixed shape but no fixed volume.
3.
Which of the following illustrates effusion of a gas?
a.
A tire deflates after being punctured by a nail.
b.
Fragrance of cologne is present in a room in which none has been used.
c.
Cooking aromas from the kitchen can be detected by a person on the front porch.
d.
A dog follows a scent during a search and rescue mission.
4.
Which of the following is a covalent network solid?
SC.1.2.4.5
a.
quartz
b.
table salt
c.
table sugar
d.
ice
5.
Which of the following phase changes will release energy during the transition?
SC.A.1.4.3
a.
melting
b.
sublimation
c.
condensation
d.
vaporization
6.
The phase change that describes the direct conversion of a solid into a gas is _______.
a.
sublimation
b.
deposition
c.
vaporization
d.
melting
7.
In a balloon filled with air
about 80% nitrogen and 20% oxygen
, the pressure in the balloon is primarily ___________________________.
a.
the sum of the pressures exerted by nitrogen and oxygen
b.
the pressure exerted by oxygen
c.
zero
d.
the pressure exerted by nitrogen
8.
In a polar molecule, which atom will have the greatest partial negative charge?
SC.A.1.4.5
a.
the smallest atom
b.
the least electronegative atom
c.
the most electronegative atom
d.
the largest atom
9.
According to the phase diagram for CO
2
, what is the critical point for carbon dioxide?
SC.A.1.4.3
a.
-78
b.
-45
c.
31
d.
-100
10.
The boiling points of the halogens increase in the order F
2
< Cl
2
< Br
2
< I
2
due to an increase in ____________.
SC.A.2.4.6
a.
hydrogen bonding
b.
dispersion forces
c.
ionic interactions
d.
permanent dipoles
11.
The curved shape of water in a glass pipette is an example of _________.
SC.C.2.4.2
a.
adhesion
b.
compression
c.
cohesion
d.
viscosity
12.
A solid whose individual particles are arranged in an orderly, geometric, three-dimensional structure is a ___________.
a.
crystalline solid
b.
amorphous solid
c.
unit cell
d.
liquid crystal
13.
Which of the following is an ionic solid?
a.
dry ice
solid carbon dioxide
b.
ammonium chloride
c.
nickel
d.
graphite
14.
Which of the following molecules can form hydrogen bonds?
SC.A.1.4.1
a.
CH
3
b.
BaH
3
c.
NaH
3
d.
NH
3
15.
According to the kinetic-molecular theory, which of these describes a gas?
SC.A.2.4.6
a.
large particles in constant, random motion
b.
small particles far apart in uniform motion
c.
small particles in constant, random motion
d.
large particles far apart in uniform motion
16.
The point on a phase diagram where the solid state, the liquid state, and the gas vapor state can coexist is _________.
SC.A.1.4.3
a.
the pressure point
b.
the absolute zero point
c.
the triple point
d.
the critical point
17.
Which molecule will not undergo hydrogen bonding?
SC.A.1.4.1
a.
HF
b.
NH
3
c.
H
2
O
d.
CH
4
18.
Which of the following is the general definition of a gas?
a.
Matter with a fixed shape but no fixed volume.
b.
Matter with a fixed volume and a fixed shape.
c.
Matter with no fixed volume and no fixed shape.
d.
Matter with a fixed volume but no fixed shape.
