DP Chemistry (first assessment 2025)

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Question 21M.1A.HL.TZ2.36

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.1A.HL.TZ2.36
Level	HL	Paper	1A	Time zone	TZ2
Command term	Deduce	Question number	36	Adapted from	N/A

36.

[Maximum mark: 1]

21M.1A.HL.TZ2.36

Which compound rotates the plane of plane-polarized light?

A. CH₃C(CH₃)ClCH₃

B. CH₃CH₂CHClCH₃

C. CH₃C(Cl)₂CH₃

D. CH₃CClBrCH₃

[1]

Markscheme

B

Syllabus sections

Structure 3. Classification of matter » Structure 3.2—Functional groups: Classification of organic compounds » Structure 3.2.8—Mass spectrometry (MS) of organic compounds can cause fragmentation of molecules. Deduce information about the structural features of a compound from specific MS fragmentation patterns.