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CAIE A-Level Chemistry AS 8.3.1 And Use the Terms Catalyst and Catalysis Questions

Practise explaining catalyst action, alternative reaction pathways and lower activation energy using CAIE 9701 AS questions and mark schemes.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Explain how catalysts provide an alternative reaction pathway with lower activation energy and are unchanged at the end of a reaction.

CAIE A-Level Chemistry AS 8.3.1 And Use the Terms Catalyst and Catalysis Questions question 1

[Maximum number: 1]

The Boltzmann distribution for the hydrogenation of an alkene at a particular temperature in the absence of a catalyst is shown.

Figure for Question CAIE A-Level Chemistry AS 8.3.1 And Use the Terms Catalyst and Catalysis Questions question 1 — CAIE A-Level Chemistry AS

Which row correctly describes the effects of adding a nickel catalyst to the reaction vessel?

the shape of the Boltzmann distribution

activation energy, EaE_{a}

changes

decreases

changes

increases

does not change

decreases

does not change

increases

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