A-LevelChemistryAnalytical techniques9701/12 · May/June 2020 · 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

C: Q and R only

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Topic: Analytical techniques, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2020 Paper 1 Variant 2, question 21.

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