CIE iGCSE Co-Ordinated Science P2.1.3 Pressure changes Exam Style Questions Paper 2
Question
A gas in a balloon is heated at constant pressure.
What happens to the gas?
(A) Its density decreases.
(B) Its mass decreases.
(C) Its temperature decreases.
(D) Its volume decreases.
▶️Answer/Explanation
Ans: A
Question
The pressure of a gas in a container is caused by gas molecules colliding with the walls.
The pressure can be increased by heating the gas or by reducing its volume.
Which row explains why the pressure increases in each case?
▶️Answer/Explanation
Ans : B
Question
Some gas is put in a sealed metal container of constant volume.
The gas is now cooled.
What happens to the average speed of the gas molecules, and what happens to the pressure of the gas?
▶️Answer/Explanation
Ans : A
Question
A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the container does not change.
How do the kinetic energy of the molecules and the pressure of the gas change?
▶️Answer/Explanation
Ans: D