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NMR spectroscopy

From Mock A · Paper 2: Organic and Physical Chemistry
4.16 marks
Compound X, C₄H₈O₂, has an IR absorption at 1740 cm⁻¹ and no broad absorption at 2500–3300 cm⁻¹. Its ¹H NMR spectrum shows:
δ / ppmIntegrationSplitting
4.12quartet
2.03singlet
1.23triplet
Deduce the structure of X, explaining your reasoning.
From Mock A · Paper 3: Practical skills, all content and multiple choice
331 mark
Which compound is used as the standard in NMR spectroscopy?
From Mock B · Paper 2: Organic and Physical Chemistry
13.14 marks
Predict the ¹H NMR spectrum of ethyl ethanoate, CH₃COOCH₂CH₃: number of peaks, integration ratio and splitting.
From Mock B · Paper 2: Organic and Physical Chemistry
13.22 marks
Explain why TMS and CDCl₃ are used in NMR spectroscopy.
From Mock B · Paper 3: Practical skills, all content and multiple choice
95 marks
Compound X, C₃H₆O₂, reacts with sodium carbonate to produce CO₂. Its ¹H NMR spectrum has three peaks: a triplet (3H), a quartet (2H) and a singlet (1H) at δ 11.0. Identify X and explain your reasoning.
From Mock B · Paper 3: Practical skills, all content and multiple choice
381 mark
How many peaks in the ¹³C NMR spectrum of propanone?
From Mock C · Paper 2: Organic and Physical Chemistry
13.13 marks
How many peaks are in the ¹³C NMR spectrum of butanone, CH₃COCH₂CH₃? Explain.
From Mock C · Paper 2: Organic and Physical Chemistry
13.23 marks
A compound C₃H₈O has a ¹H NMR spectrum with a doublet (6H), a septet (1H) and a singlet (1H). Identify it.
From Mock C · Paper 2: Organic and Physical Chemistry
166 marks
A student makes aspirin from 2-hydroxybenzoic acid and ethanoic anhydride. Describe how the crude product is purified by recrystallisation and how its purity and identity can be checked.
From Mock C · Paper 3: Practical skills, all content and multiple choice
381 mark
In ¹H NMR, a peak split into a triplet has
Score 0 / 32 · 0 of 10 marked

This paper is written by Plasmo in the style of the AQA A-Level Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.

NMR spectroscopy Exam Questions: AQA A-Level Chemistry | Plasmo