DP Chemistry (first assessment 2025)

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Question 19M.1A.SL.TZ1.25

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.1A.SL.TZ1.25
Level	SL	Paper	1A	Time zone	TZ1
Command term		Question number	25	Adapted from	N/A

25.

[Maximum mark: 1]

19M.1A.SL.TZ1.25

What is the IUPAC name of the following molecule?

A. 2-bromo-3-ethylbutane

B. 3-methyl-4-bromopentane

C. 2-ethyl-3-bromobutane

D. 2-bromo-3-methylpentane

[1]

Markscheme

D

Examiners report

57 % of candidates could correctly apply IUPAC nomenclature.

Syllabus sections

Structure 3. Classification of matter » Structure 3.2—Functional groups: Classification of organic compounds » Structure 3.2.5—“IUPAC nomenclature” refers to a set of rules used by the International Union of Pure and Applied Chemistry to apply systematic names to organic and inorganic compounds. Apply IUPAC nomenclature to saturated or mono-unsaturated compounds that have up to six carbon atoms in the parent chain and contain one type of the following functional groups: halogeno, hydroxyl, carbonyl, carboxyl.