A rigid steel cylinder contains oxygen gas at a constant volume. Why does the pressure of the gas inside the cylinder increase when its temperature increases?
The oxygen molecules hit each other less often.
The oxygen molecules hit the inside walls of the cylinder less often.
The average speed of the oxygen molecules in the cylinder is greater.
The volume of each oxygen molecule 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.