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O-LevelChemistryRates of Reaction5070/11 · May/June 2019 · Q161 Mark

The diagram shows the energy profile for a reaction. Which statement about this reaction is correct?

Diagram for this question, from the exam paper

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.

AIt is endothermic and the activation energy is P – Q.
BIt is endothermic and the activation energy is P – R.
CIt is exothermic and the activation energy is P – Q.
DIt is exothermic and the activation energy is P – R.

✓ Correct answer

B: It is endothermic and the activation energy is P – R.

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About this question

Topic
Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2019 Paper 1 Variant 1, question 16.

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