DP Chemistry (last assessment 2024)

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Question 22M.2.hl.TZ2.8e(ii)

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.hl.TZ2.8e(ii)
Level hl Paper 2 Time zone TZ2
Command term Deduce Question number e(ii) Adapted from N/A
e(ii).
[Maximum mark: 1]
22M.2.hl.TZ2.8e(ii)

Carbon forms many compounds.

(e(ii))

Deduce the splitting pattern in the 1H NMR spectrum for 1-bromopropane.

[1]

Markscheme

triplet/3 AND multiplet/6 AND triplet/3 ✔

Examiners report

Another of the very poorly answered questions where most candidates (90%) failed to predict 3 peaks and when they did, considered there would be a quartet instead of multiplet/sextet; other candidates seemed to have no idea at all. This is strange because the compound is relatively simple and while some teachers considered that predicting a sextet may be beyond the current curriculum or just too difficult, they could refer to a multiplet; a quartet is clearly incorrect.

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