A-Level ChemistryYear 2016Q4
Page 03 4. The diagram below shows the energy profiles for a reaction carried out with and without a catalyst. 250 200 150 100 50 0 Reaction path Potential energy (kJ mol−1) What is the enthalpy change, in kJ mol–1, for the catalysed reaction? A –100 B –50 C +50 D +100 5. Limonene is a terpene molecule present in lemons. H2C H2C CH CH2 CH C CH3 C H3C CH2 limonene How many isoprene units are joined together in a limonene molecule? A 1 B 2 C 3 D 4 [Turn over
Paper Source:NH_Chemistry_all_2016.pdf
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Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectChemistry
Official MarksVariable (2–6 marks)