DP Chemistry (last assessment 2024)

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Question 22M.1.hl.TZ2.40

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1.hl.TZ2.40
Level hl Paper 1 Time zone TZ2
Command term Interpret Question number 40 Adapted from N/A
40.
[Maximum mark: 1]
22M.1.hl.TZ2.40

Given equimolar concentrations, which substance would produce the strongest signal in a 1H NMR spectrum?


A.  (CH3)3CH

B.  C6H6

C.  C8H18

D.  Si(CH3)4

[1]

Markscheme

D

Examiners report

47% of the candidates identified TMS as the substance producing the strongest signal in a 1H NMR spectrum. The wording of this question was not ideal and several teachers commented on this. We do not usually refer to the strength but the area under the signal.

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