A-LevelChemistryReaction kineticsMay/June 2025Paper 1 Q31 Mark

The diagram shows a Boltzmann distribution of molecular energies for a gaseous reaction at two different temperatures and two different activation energies. [Figure showing Boltzmann distribution with T1, T2, EA(1), EA(2)] Which combination of temperature and activation energy will give the highest reaction rate?

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

The correct answer is D: T2 and EA(1).

Q: What topic does this question test?

This question tests Reaction kinetics in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

AT₁ and EA(1)

BT₁ and EA(2)

CT2 and EA(2)

DT2 and EA(1)

✓ Correct Answer

The correct answer is D: T2 and EA(1)

📋 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 Chemistry Question

Topic

This multiple-choice question tests Reaction kinetics in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry May/June 2025 examination, Paper 1 Variant 2.

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