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.
126 exam-style questions on CIE IGCSE Physics 2.1.3a The absolute scale of temperature. Each one has a worked solution and a mark scheme showing where the marks go.