Junior Secondary · Science

Gas pressure: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Gas pressure.

10 questions24 marksFree, no account

Question 1

1 mark

If more gas particles are pumped into a rigid, sealed container while the temperature remains constant, what happens to the internal gas pressure and why?

Question 2

1 mark

When a student presses a suction cup against a smooth wall, most of the air is pushed out from the space between the cup and the wall. Which of the following describes why the cup remains stuck to the wall?

Question 3

1 mark

A fixed amount of gas in a sealed flexible container is observed to maintain a constant pressure, even as its temperature is increased and its volume simultaneously expands. Using the particle theory of matter, which statement best explains how the pressure remains constant under these conditions?

Question 4

1 mark

In which of the following scenarios would the gas pressure inside a sealed, flexible container decrease?

Question 5

1 mark

Which of the following statements best explains why water enters a syringe when the plunger is pulled upwards while the nozzle is submerged in a beaker of water?

Question 6

2 marks

Why does a bicycle tyre feel harder on a hot day compared to a cold day, assuming no air leakage?

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Question 7

4 marks

When more air is pumped into a rigid metal canister at a constant temperature, the internal gas pressure increases. Explain this observation in terms of the particle theory.

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Question 8

6 marks

A student uses a pressure sensor to monitor a fixed mass of gas in a sealed, non-rigid container. When the container is placed in a hot water bath, it expands. If the final gas pressure remains equal to the external atmospheric pressure, explain why the pressure did not increase despite the temperature rise.

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Question 9

3 marks

(a) According to the particle theory, explain what causes gas pressure inside a sealed container.
(b) If the sealed container is heated, what happens to the gas pressure inside? Explain your answer in terms of particle movement.

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Question 10

4 marks

A fixed mass of gas is contained in a flexible balloon at constant temperature.

a) Explain, using the particle theory of gases, what happens to the gas pressure inside the balloon if the volume of the balloon is reduced. (3 points)

b) Give one everyday example where this principle (relationship between volume and pressure at constant temperature) is observed. (1 point)

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