DP Chemistry (first assessment 2025)

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Question 22M.1A.SL.TZ1.25

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.SL.TZ1.25
Level	SL	Paper	1A	Time zone	TZ1
Command term	Classify	Question number	25	Adapted from	N/A

25.

[Maximum mark: 1]

22M.1A.SL.TZ1.25

Which compounds are members of the same homologous series?

A. propanal, propanone, propanoic acid

B. propane, propene, propyne

C. hexan-1-ol, hexan-2-ol, hexan-3-ol

D. ethanol, propan-1-ol, butan-1-ol

[1]

Markscheme

D

Syllabus sections

Structure 3. Classification of matter » Structure 3.2—Functional groups: Classification of organic compounds » Structure 3.2.3—A homologous series is a family of compounds in which successive members differ by a common structural unit, typically CH2. Each homologous series can be described by a general formula. Identify the following homologous series: alkanes, alkenes, alkynes, halogenoalkanes, alcohols, aldehydes, ketones, carboxylic acids, ethers, amines, amides and esters.