DP Chemistry (last assessment 2024)

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Question 22N.1.sl.TZ0.26

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Date November 2022 Marks available [Maximum mark: 1] Reference code 22N.1.sl.TZ0.26
Level sl Paper 1 Time zone TZ0
Command term State Question number 26 Adapted from N/A
26.
[Maximum mark: 1]
22N.1.sl.TZ0.26

Which conditions best favour oxidation of primary alcohols directly to carboxylic acids?


A.  Excess acidified potassium dichromate (VI) and distillation

B.  Excess acidified potassium dichromate (VI) and reflux

C.  Few drops of acidified potassium dichromate (VI) and distillation

D.  Few drops of acidified potassium dichromate (VI) and reflux

[1]

Markscheme

B

Examiners report

51% of the candidates identified the conditions that favour the oxidation of primary alcohols directly to carboxylic acids. The question had good discrimination between high-scoring and low-scoring candidates.

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