A-LevelPhysicsIdeal gasesOct/Nov 2012Paper 1 Q251 Mark

What leads to the conclusion that the movement of molecules is random?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is D: motion of dust particles in air.

Q: What topic does this question test?

This question tests Ideal gases in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Aevaporation of water at room temperature

Bconduction of electricity in water

Cconvection currents in air

Dmotion of dust particles in air

✓ Correct Answer

The correct answer is D: motion of dust particles in air

📋 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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Ideal gases in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2012 examination, Paper 1 Variant 2.

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