A-LevelChemistryReaction kinetics9701/12 · May/June 2019 · Q111 Mark

Which row is an example of heterogeneous catalysis? reaction catalyst A esterification sulfuric acid B the Contact process divanadium pentoxide C destruction of the ozone layer chlorine radicals D atospheric formation of sulfur trioxide nitrogen dioxide

Areaction: esterification, catalyst: sulfuric acid

Breaction: the Contact process, catalyst: divanadium pentoxide

Creaction: destruction of the ozone layer, catalyst: chlorine radicals

Dreaction: atmospheric formation of sulfur trioxide, catalyst: nitrogen dioxide

✓ Correct answer

B: reaction: the Contact process, catalyst: divanadium pentoxide

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Topic: Reaction kinetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2019 Paper 1 Variant 2, question 11.

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