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Which is an example of the kinetic-molecular theory not holding true for a gas?

A
The attraction between particles causes a gas to condense at low temperatures.
B
The average kinetic energy of particles depends only on the temperature.
C
The particles in a gas travel in straight lines in a continuous, random motion.
D
The particles in a gas make up a small portion of the total volume of the gas.
3

Which statement describes a limitation of the kinetic-molecular theory for a gas?

A
The theory assumes that particles are in random and continuous motion.
B
The theory states that pressure is inversely proportional to volume.
C
The theory states that pressure increases with temperature.
D
The theory assumes that particles do not experience intermolecular forces.
4

The closeness of particles of gas and their low speeds allow intermolecular forces to become important at certain pressures and temperatures. Which best describes this statement?

A
This describes ideal gas behavior without the kinetic-molecular theory.
B
This is a postulate of the kinetic-molecular theory.
C
This is a limitation of the kinetic-molecular theory.
D
This describes ideal gas behavior using the kinetic-molecular theory.
5

Which two conditions can limit the usefulness of the kinetic-molecular theory in describing gas behavior?

A
high pressure and medium temperatures
B
high pressure and low temperatures
C
low pressure and medium temperatures
D
low pressure and low temperatures
6

Which step will decrease the pressure of a gas inside a closed cubical container?

A
increasing the speed of the gas particles
B
decreasing the temperature inside the container
C
decreasing the volume of the container
D
increasing the number of moles of gas
7

Which sequence represents the relationship between temperature and volume as explained by the kinetic-molecular theory?

A
higher temperature right arrow more kinetic energy right arrow less space between particles right arrow lower volume
B
higher temperature right arrow less kinetic energy right arrow more space between particles right arrow lower volume
C
higher temperature right arrow more kinetic energy right arrow more space between particles right arrow higher volume
D
higher temperature right arrow less kinetic energy right arrow less space between particles right arrow higher volume
8

According to the kinetic-molecular theory, the collision between two ideal gas particles is a result of

A
repulsion from other gas particles.
B
repulsion from the wall of the container.
C
attraction between the two particles.
D
neither attraction nor repulsion.
9

Which statement about gases is true?

A
They are made up of particles that travel in a curved path when in motion.
B
They are made up of hard spheres that are in random motion.
C
They are made up of hard spheres that vibrate quickly in stationary positions.
D
They are made up of particles that always move very slowly.
10

A substance is made up of slow-moving particles that have very little space between them. Based on this information, what can most likely be concluded about this substance?

A
It is not a gas because its particles do not have large spaces between them.
B
It is a gas because its particles move in many different directions.
C
It is not a gas because its particles do not move continuously.
D
It is a gas because its particles move continuously in a straight line.

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Pretest Answers — Chemistry