A-Level ChemistryYear 2019Q11
14 (B410U20-1) 11. Compound A contains 55.8 % carbon, 7.00 % hydrogen and 37.2 % oxygen by mass. Part of its infrared spectrum is shown below. © WJEC CBAC Ltd. 3000 2000 1500 1000 500 Transmittance Wavenumber / cm–1 • An aqueous solution of compound A has a pH of less than 7. • In an addition reaction, 2.00 g of compound A reacts with 3.71 g of bromine in a 1 : 1 molar ratio. (B410U20-1) Turn over. 15 Examiner only Use all the data given to identify all the possible structures of compound A. Explain what information can be found from each piece of data. [10] © WJEC CBAC Ltd. 10
Paper Source:s19-8410-02.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)