DP Chemistry (first assessment 2025)

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Question 19M.1A.SL.TZ2.27

Date	May 2019	Marks available	[Maximum mark: 1]	Reference code	19M.1A.SL.TZ2.27
Level	SL	Paper	1A	Time zone	TZ2
Command term		Question number	27	Adapted from	N/A

27.

[Maximum mark: 1]

19M.1A.SL.TZ2.27

What is the name of this compound using IUPAC rules?

A. 2,3-diethylbutane

B. 2-ethyl-3-methylpentane

C. 3-methyl-4-ethylpentane

D. 3,4-dimethylhexane

[1]

Markscheme

D

Examiners report

This was the easiest question on the paper. 94% of the candidates recognized the correct IUPAC name of the compound.

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.