A-LevelChemistryAnalytical techniquesMay/June 2020Paper 1 Q211 Mark
The table shows the molecular formulae of three molecules P, Q and R. None of the molecules are cyclic. molecule molecular formula P CH4O Q CH2O2 R CH2O Which molecules show a strong absorption between 1610 cm⁻¹ and 1750 cm⁻¹ in their infra-red spectra?
AQ only
BR only
CQ and R only
DP, Q and R
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of analytical techniques within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 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...
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