DP Chemistry (last assessment 2024)

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Question 22N.1.sl.TZ0.25

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.sl.TZ0.25
Level sl Paper 1 Time zone TZ0
Command term Apply Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
22N.1.sl.TZ0.25

Which homologous series has the general formula CnH2nO (n > 2)?


A.  Alcohols

B.  Carboxylic acids

C.  Ethers

D.  Ketones

[1]

Markscheme

D

Examiners report

49% of the candidates deduced that ketones had the general formula CnH2nO. The distractors were chosen with almost equal frequency. The question had good discrimination between high-scoring and low-scoring candidates.

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