Behavior of Gases
Practice Test
1.
The _______________ states that the submicroscopic particles of all matter are in constant, random motion.
a.
atomic theory
b.
kinetic theory
c.
molecular hypothesis
d.
Brownian law
2.
Which of these is NOT a binary compound?
a.
carbon dioxide
b.
potassium iodide
c.
water
d.
aluminum nitrate
3.
At room temperature, gas particles move at roughly _____________ m/s.
a.
100 to 1000
b.
0.1 to 0.5
c.
1 to 2
d.
10 000
4.
Name the molecular compound represented by the formula PF
5
.
a.
phosphorus fluorine
b.
phosphorus(V) fluorine
c.
phosphate
d.
phosphorus pentafluoride
5.
According to the kinetic-molecular theory, which of these describes a gas?
a.
small particles far apart in uniform motion
b.
large particles in constant, random motion
c.
small particles in constant, random motion
d.
large particles far apart in uniform motion
6.
What type of reaction occurs when potassium and chlorine gas produce potassium chloride?
a.
decomposition
b.
combustion
c.
synthesis
d.
replacement
7.
This scientist compared the the motions of electrons in atoms to the motions of planets orbiting the sun.
a.
Priestly
b.
Bohr
c.
Thomson
d.
Rutherford
8.
A description of a chemical reaction that includes the names of all reactants and products, but not the formulas, is called a ___________________.
a.
skeleton equation
b.
balanced equation
c.
word equation
d.
chemical equation
9.
A ____________ reaction is one in which a compound breaks down into two or more simpler substances.
a.
synthesis
b.
photosynthesis
c.
replacement
d.
decomposition
10.
A magnesium atom has _______ valence electron.
a.
two
b.
five
c.
four
d.
three
11.
____________________ states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles.
a.
Charles's law
b.
Avogadro's principle
c.
Boyle's law
d.
The ideal gas law
12.
At the same temperature, a steam burn may be more severe than a water burn because of water's high _______________________.
a.
heat of vaporization
b.
density
c.
polarity
d.
mass
13.
976 L of oxygen at STP is compressed into a 12.0-L tank at 273 K. What is the gas pressure in the tank?
a.
2.00 atm
b.
2000 mm Hg
c.
81.3 atm
d.
1.00 atm
14.
C
5
H
12
is the formula for the hydrocarbon _____________.
a.
carbon hydride
b.
pentane
c.
methane
d.
hexane
15.
The air in tires can support a truck or automobile because gases _________________.
a.
have volume
b.
have mass
c.
exert pressure
d.
have gravity
16.
________________ indicate a state of equilibrium in a chemical equation.
a.
A plus sign
b.
Double reaction arrows
c.
A minus sign
d.
An equal sign
17.
____________ is the pressure that supports a 760-mm column of mercury.
a.
One meter
b.
One pascal
c.
One lb/in
2
d.
One atmosphere
18.
A substance that increases the rate of a chemical reaction without being permanently changed or consumed is called ______________.
a.
a catalyst
b.
a product
c.
a reactant
d.
an equilibrate
19.
What is the oxidation number of Group 17 nonmetals?
a.
0
b.
3
c.
-1
d.
1
20.
What is the coefficient for NaOH in the equation that describes its reaction with CO
2
to produce Na
2
CO
3
and H
2
O?
a.
2
b.
3
c.
1
d.
4
