Skip to main content
A-LevelChemistryAnalytical techniquesFeb/Mar 2018Paper 4 Q914 Marks

Two molecules of compound F react together under suitable conditions to form compound G. Some information about compounds F and G is given. • The mass spectrum of F has a peak due to the molecular ion at m/e = 106, and a peak at m/e = 107 with an abundance 8% of the 106 peak. • The mass spectrum of G has a peak due to the molecular ion at m/e = 212, and major peaks at m/e = 91 and m/e = 105. • Both F and G contain oxygen and are neutral compounds which are insoluble in water. • The ¹H NMR spectrum of F includes a singlet peak at δ = 10.0 due to one proton. • The ¹H NMR spectrum of G includes a singlet peak at δ = 5.1 due to two protons. • When G is heated with dilute sulfuric acid, benzoic acid, C₆H₅CO₂H, and phenylmethanol, C₆H₅CH₂OH, are produced. Use this information to answer (i)–(vi).

📋 Examiner Report & Trap Analysis

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...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

🔒

Unlock the Examiner's Analysis

Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.

Sign Up Free to Unlock →

Join thousands of Cambridge students already using Oracle Prep

About This A-Level Chemistry Question

Topic

This structured question tests Analytical techniques in A-Level Chemistry (syllabus code 9701). It is worth 14 marks.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2018 examination, Paper 4 Variant 2.

Practice on Oracle Prep

Oracle Prep provides AI-powered practice for all Cambridge O-Level and A-Level subjects. Our platform includes topic predictions with 87.7% accuracy, AI essay grading, and a comprehensive question bank spanning 25 years of past papers across 29 subjects.

Related Chemistry Questions

© 2026 Oracle Prep — The AI-Powered Cambridge Exam Engine