A sealed, rigid container of gas is cooled, causing the pressure of the gas to decrease. Which statement explains this decrease in pressure?
The forces of the gas particles striking the walls of the container decrease.
The forces of attraction between the gas particles and the walls of the container decrease.
The gas particles collide with each other more frequently.
The gas particles gain more kinetic energy when they strike the walls of the container.
151 exam-style questions on CIE IGCSE Physics 2.1.2a Particle structure and motion in solids, liquids and gases. Each one has a worked solution and a mark scheme showing where the marks go.