A-LevelChemistryAnalytical techniques9701/12 · Feb/Mar 2021 · 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

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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

B: X: 2-methylpent-2-ene, Y: propanone, Z: propanoic acid

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Topic: Analytical techniques, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2021 Paper 1 Variant 2, question 30.

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