OFFICIAL SUMMER 2025 PEARSON EDEXCEL Pearson Edexcel GCE A Level In Chemistry (9CH0) Paper 02: Advanced Organic and Physical Chemistry MERGED QUESTION PAPER + MARK SCHEME

OFFICIAL SUMMER 2025 PEARSON EDEXCEL Pearson Edexcel GCE A Level In Chemistry (9CH0) Paper 02: Advanced Organic and Physical Chemistry MERGED QUESTION PAPER + MARK SCHEME Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 This question is about mass spectrometry. (a) Which molecule would not give a molecular ion peak with m/z = 74? A C2H5COOH B CHOCOOH C CH2(OH)COOH D CH3COOCH3 (b) The fragmentation pattern in a mass spectrum can be used to distinguish between structural isomers. Which m/z peak would be present in the mass spectrum of propanal, CH3CH2CHO, but not in the mass spectrum of propanone, CH3COCH3? A 15 B 29 C 43 D 59 (1) (1) (Total for Question 1 = 2 marks) ■■■■ 3 Turn over DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRIT