Chapter 14:
Gases, Atoms, and Molecules
Practice Test
1.
What happens to the volume of air as you pump it into a bicycle tire?
a.
The volume increases, but pressure decreases.
b.
The volume remains constant, but pressure increases.
c.
The volume decreases.
d.
The volume increases.
Hint
2.
Which of the following statements is consistent with John Dalton's development of atomic theory?
a.
All atoms of a given element are unique.
b.
Different elements have different atoms.
c.
The volume decreases.
d.
All of the above.
Hint
3.
Assuming a fixed amount of gas, which statement describes Charles's law?
a.
At constant temperature, volume of a gas increases as pressure increases.
b.
At constant temperature, volume of a gas decreases as pressure increases.
c.
At constant volume, the pressure of a gas increases as temperature increases.
d.
At constant pressure, the volume of a gas increases as temperature increases.
Hint
4.
What properties of gases may be explained by considering a gas as being made up of tiny particles?
a.
pressure
b.
low density
c.
At constant volume, the pressure of a gas increases as temperature increases.
d.
All of the above.
Hint
5.
How does SCUBA equipment help you breathe underwater?
a.
SCUBA prevents nitrogen from dissolving into your bloodstream.
b.
SCUBA decreases the volume of air you need to breathe underwater.
c.
At constant volume, the pressure of a gas increases as temperature increases.
d.
all of the above
Hint
6.
How does the particle theory of gases explain pressure?
a.
Gas particles are in motion.
b.
Tiny gas particles collide with the walls of any container they are in.
c.
At constant volume, the pressure of a gas increases as temperature increases.
d.
All of the above.
Hint
7.
What determines the shape and volume of a body of gas?
a.
density
b.
shape and volume of its container
c.
pressure
d.
all of the above
Hint
8.
Suppose you are able to decompose a given amount of water into hydrogen and oxygen. You discover that the volume ratio of hydrogen to oxygen is two to one. Now suppose you decompose twice the original amount of water into elements. What is the new volume ratio of hydrogen to oxygen?
a.
four to two
b.
four to one
c.
two to one
d.
one to two
Hint
9.
As you speed down the road in your new car, the tires of the car heat up, and so does the air inside the tires. What happens to the pressure and volume of a gas as temperature increases?
a.
Pressure and volume decrease.
b.
Pressure and volume remain constant.
c.
Pressure and volume increases.
d.
Pressure increases and volume decreases.
Hint
10.
What is an everyday example of a partial vacuum?
a.
a light bulb
b.
drinking with a straw
c.
a television tube
d.
All of the above.
Hint
11.
What scientist completed the circle of laws relating pressure, volume, and temperature of gases?
a.
Joseph Gay-Lussac
b.
Robert Boyle
c.
Jacques Charles
d.
Isaac Newton
Hint
12.
What is the smallest particle of an element that still has the properties of that element?
a.
a substance
b.
an atom
c.
a compound
d.
a molecule
Hint
13.
Suppose that a certain, very wet compound is made with a ratio of 8 g of oxygen to 1 g of hydrogen. If you have 2 g of hydrogen and 100 g of oxygen, how much of this compound can you make?
a.
50 g
b.
108 g
c.
18 g
d.
16 g
Hint
14.
Which statement describes Boyle's law?
a.
At constant temperature, volume of a gas increases as pressure increases.
b.
At constant temperature, volume of a gas decreases as pressure increases.
c.
At constant volume, the pressure of a gas increases as temperature increases.
d.
At constant pressure, the volume of a gas increases as temperature increases.
Hint
15.
Who first suggested the atomic theory of matter?
a.
Dalton
b.
Newton
c.
Boyle
d.
Democritus
Hint
