A-LevelPhysicsIdeal gasesOct/Nov 2014Paper 1 Q181 Mark
Which statement about molecules in a gas is correct?
AIn Brownian motion experiments, the molecules can be seen moving randomly in all directions.
BThe pressure exerted by a gas is caused by molecules bouncing against each other and changing kinetic energy.
CThe pressure exerted by a gas is caused by molecules rebounding from the walls of a container and changing momentum.
DWhen the average speed of the molecules in a closed container increases, the density must also increase.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of ideal gases within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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