A-LevelChemistryAnalytical techniquesMay/June 2025Paper 1 Q401 Mark
The mass spectrum of CH3Cl shows a molecular ion peak, M⁺, at the m/e value of 50 with a relative abundance of 18.0%. Other peaks are present in the mass spectrum. What is seen in the mass spectrum at the m/e value of 52?
Apeak with relative abundance of 4.5%
Bpeak with relative abundance of 6.0%
Cpeak with relative abundance of 18.0%
Dpeak with relative abundance of 54.0%
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of analytical techniques within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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