Question 1

Jane can still pump air in the party balloon even though it is already inflated. What explains this phenomenon?

Accepted Answer

Air molecules can be compressed.

Answer

The air inside the balloon is hot.

Answer

Balloons look better if their size is bigger.

Answer

Balloons are made up of plastic.

Question 2

What happens to the lungs of a scuba diver as it moves closer to the seafloor?

Accepted Answer

The lungs compress.

Answer

The lungs explode.

Answer

The lungs expand.

Answer

There is no change in the lungs.

Question 3

Which phenomenon best illustrates Charles’ Law?

Accepted Answer

Expansion of the balloon as it is being submerged in hot water

Answer

Carbon dioxide is dissolved in water.

Answer

Breathing apparatus being used by a patient

Answer

The leavening agent causing the fluffiness of cake products

Question 4

Records show that the incidence of tire explosions is high during the summer season. Which of the following gives the best explanation for this observation?

Accepted Answer

High temperature during the summer season causes the air inside the tire to expand.

Answer

Vehicles’ tires are not well maintained.

Answer

There is too much air inside the tires.

Answer

There are more travelers during summer vacations.

Question 5

If the temperature of a fixed quantity of gas decreases and the pressure remains unchanged,

Accepted Answer

its volume decreases.

Answer

its volume increases.

Answer

its volume is unchanged.

Answer

its volume is neglected.

Question 6

How can you possibly prove that gases have negligible mass?

Accepted Answer

Put a balloon in a digital balance before and after you fill it with air.

Answer

Feel the weight of the samples on both hands.

Answer

Support your claim through an equation.

Answer

Ask two persons to hold a box filled with air.

Question 7

What is NOT an assumption of the kinetic molecular theory to the motion of the gas?

Accepted Answer

It moves in a curved path.

Answer

It moves in a straight-line motion.

Answer

It moves in a constant motion.

Answer

It moves in random motions.

Question 8

Which is an assumption of the kinetic molecular theory?

Accepted Answer

The speed of the particles in a gas is directly proportional to the Kelvin temperature.

Answer

The particles of gas collide and emit energy to the surroundings.

Answer

The particles of gas attract one another via intermolecular forces.

Answer

The particles of gas have a distinct volume measured in mL.

Question 9

A gas occupies a volume of 2.0 L at a pressure of 1.0 atm. If the volume of the gas decreases to half of its original value, what is its new pressure if the temperature remains unchanged?

Accepted Answer

2.0 atm

Answer

1.0 atm

Answer

1.5 atm

Answer

0.5 atm

Question 10

The pressure of a gas is kept constant. If the initial temperature is doubled, what will happen to the volume it occupies?

Accepted Answer

It will be doubled.

Answer

It will decrease to half of its original value.

Answer

It will be the same value as the pressure.

Answer

Nothing will change in the volume.

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