DP Chemistry (first assessment 2025)

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Question 21N.1A.SL.TZ0.13

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.1A.SL.TZ0.13
Level	SL	Paper	1A	Time zone	TZ0
Command term	Identify	Question number	13	Adapted from	N/A

13.

[Maximum mark: 1]

21N.1A.SL.TZ0.13

Which alcohol is least soluble in water?

A. CH₃OH

B. CH₃CH₂OH

C. CH₃CH₂CH₂OH

D. CH₃CH₂CH₂CH₂OH

[1]

Markscheme

D

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.9—Given comparable molar mass, the relative strengths of intermolecular forces are generally: London (dispersion) forces < dipole–dipole forces < hydrogen bonding. Explain the physical properties of covalent substances to include volatility, electrical conductivity and solubility in terms of their structure.