A sealed rigid flask contains a fixed mass of gas.
The temperature of the flask and the gas is decreased. Which statement about the gas in the flask is correct?
The gas molecules collide with the walls of the flask less frequently.
The average speed of the gas molecules increases.
The gas molecules hit the walls of the flask with greater force.
The pressure of the gas increases.
321 exam-style questions on CIE IGCSE Physics 2.1 Kinetic particle model of matter, covering 2.1.1 States of matter and changes of state, 2.1.2a Particle structure and motion in solids, liquids and gases, 2.1.2b Gas pressure and particle collisions, 2.1.2c Brownian motion, 2.1.3a The absolute scale of temperature, and 2.1.3b Pressure, volume and temperature of a gas. Each one has a worked solution and a mark scheme showing where the marks go.