A-LevelChemistryAnalytical techniquesFeb/Mar 2021Paper 1 Q301 Mark
When reactant X is treated with a suitable reagent, products Y and Z are formed. Infrared spectra of X, Y and Z are shown. [Figure showing IR spectra for reactant X, product Y, and product Z] Which row could be correct? X Y Z A 2,3-dimethylpent-2-ene propanone butanone B 2-methylpent-2-ene propanone propanoic acid C pent-2-ene ethanoic acid propanoic acid D propyl propanoate propan-1-ol propanoic acid
AX: 2,3-dimethylpent-2-ene, Y: propanone, Z: butanone
BX: 2-methylpent-2-ene, Y: propanone, Z: propanoic acid
CX: pent-2-ene, Y: ethanoic acid, Z: propanoic acid
DX: propyl propanoate, Y: propan-1-ol, Z: propanoic acid
✓ 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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