DP Chemistry (last assessment 2024)

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Question 22N.2.hl.TZ0.6g.i

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Date November 2022 Marks available [Maximum mark: 2] Reference code 22N.2.hl.TZ0.6g.i
Level hl Paper 2 Time zone TZ0
Command term Deduce Question number g.i Adapted from N/A
g.i.
[Maximum mark: 2]
22N.2.hl.TZ0.6g.i

2-Bromobutane can react with cyanide, CN−, in a nucleophilic substitution reaction.

(g.i)

Deduce the number of signals and the ratio of areas under the signals in the 1H NMR spectrum of 2-bromobutane.

[2]

Markscheme

Number of signals:

4 ✔

 

Ratio of areas:

3:1:2:3 ✔

 

Accept ratio of areas in any order.

Examiners report

Usually if candidates could deduce the number of peaks, as about three quarters could, they also gained the second mark for their relative areas.

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