A-LevelChemistryReaction kineticsOct/Nov 2021Paper 1 Q311 Mark
The Boltzmann distribution diagram shows a fixed amount of a gas at two different temperatures, T₁ and T₂. [Figure of Boltzmann distribution diagram] Which statements correctly describe the features of this diagram? 1 Temperature T₁ is lower than temperature T₂. 2 The shaded area indicates the particles that have sufficient energy to react at T₂. 3 The total area under each curve is the same for both temperatures.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct Answer
The correct answer is A: 1, 2 and 3 are correct
📋 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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