DP Chemistry (first assessment 2025)

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Question 21N.1A.HL.TZ0.40

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.1A.HL.TZ0.40
Level	HL	Paper	1A	Time zone	TZ0
Command term	Interpret	Question number	40	Adapted from	N/A

40.

[Maximum mark: 1]

21N.1A.HL.TZ0.40

Which substance has the following ¹H NMR spectrum?

SDBS, National Institute of Advanced Science and Technology.

A. Propane

B. Propanal

C. Butanoic acid

D. Ethyl ethanoate

[1]

Markscheme

D

Syllabus sections

Structure 3. Classification of matter » Structure 3.2—Functional groups: Classification of organic compounds » Structure 3.2.11—Individual signals can be split into clusters of peaks. Interpret 1H NMR spectra from splitting patterns showing singlets, doublets, triplets and quartets to deduce greater structural detail. Data for interpretation of 1H NMR spectra are given in the data booklet.