O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2022 · Q191 Mark

Nitrogen oxides may form in the atmosphere during lightning activity. N₂ + O₂ ⇌ 2NO The reaction is endothermic. Which energy profile diagram is correct for this reaction?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A[Energy profile diagram A]

B[Energy profile diagram B]

C[Energy profile diagram C]

D[Energy profile diagram D]

✓ Correct answer

D: [Energy profile diagram D]

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 2, question 19.

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