A-LevelChemistryReaction kinetics9701/12 · May/June 2021 · Q341 Mark

Hydrogen chloride gas is formed by the reaction shown. H₂(g) + Cl₂(g) → 2HCl(g) What will change the average kinetic energy of the reacting gas particles? 1 increasing the temperature and increasing the concentration of hydrogen 2 cooling the reaction mixture and adding a catalyst 3 adding a catalyst and increasing the concentration of chlorine

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2021 Paper 1 Variant 2, question 34.

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