DP Chemistry (first assessment 2025)

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Question 23M.2.HL.TZ2.27a

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Date May 2023 Marks available [Maximum mark: 3] Reference code 23M.2.HL.TZ2.27a
Level HL Paper 2 Time zone TZ2
Command term Predict Question number a Adapted from N/A
a.
[Maximum mark: 3]
23M.2.HL.TZ2.27a

Ethanol can be identified by a variety of analytical techniques.

(a)

Predict the structures of three possible fragments you would expect from the mass spectrum of ethanol.

[3]

Markscheme

Any three of:
CH3CH2OH+ ✓
CH3CH2+ ✓
CH3+ ✓
CH2OH+/CH3O+ ✓
OH+ ✓

 

Penalize missing charge once only.

Accept any other reasonable fragments or m/z values.