DP Chemistry (last assessment 2024)

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Question 22M.2.hl.TZ1.6b(iii)

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.hl.TZ1.6b(iii)
Level hl Paper 2 Time zone TZ1
Command term Deduce Question number b(iii) Adapted from N/A
b(iii).
[Maximum mark: 2]
22M.2.hl.TZ1.6b(iii)

Nitric acid is usually produced by the oxidation of ammonia.

A mixture of nitric acid and sulfuric acid can be used to convert benzene to nitrobenzene, C6H5NO2.

(b(iii))

Deduce the number of signals that you would expect in the 1H NMR spectrum of nitrobenzene and the relative areas of these.

[2]

Markscheme

Number of signals: three/3 ✔

Relative areas: 2 : 2 : 1 ✔

Examiners report

Deducing the number of signals in the 1H NMR spectrum of nitrobenzene, which depend on the number of different hydrogen environments, was done poorly. Also, instead of relative areas, the common answer included chemical shift (ppm) values.

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