Lesson 19B.2

19B.2 Using high resolution 1H NMR data Quiz: Pearson Edexcel Chemistry, Unit 19

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 19B.2, Using high resolution 1H NMR data: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 19: Modern Analytical Techniques II, written with Revision Ninja.

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The 20 questions

  1. What does the integration ratio of peaks in a 1H NMR spectrum indicate?

    • Number of carbons
    • Coupling constants
    • Ratio of protons
    • Chemical shift values

  2. A spectrum shows a singlet at 2.0 ppm (3H), a quartet at 4.1 ppm (2H) and a triplet at 1.3 ppm (3H). Which compound fits?

    • Propyl ethanoate
    • Ethyl methanoate
    • Ethyl ethanoate
    • Methyl propanoate

  3. Why is D2O added to an organic sample before recording a 1H NMR spectrum?

    • Identify OH protons
    • Split adjacent signals
    • Calibrate chemical shifts
    • Increase sample solubility

  4. A proton environment has three equivalent neighbouring protons. How many peaks appear in its signal?

    • 7, a septet
    • 4, a quartet
    • 2, a doublet
    • 3, a triplet

  5. A CH group is adjacent to six equivalent protons (two CH3 groups). What is its splitting pattern?

    • An octet
    • A sextet
    • A quartet
    • A septet

  6. Which chemical shift range is typical for protons on the carbon next to a ketone C=O?

    • About 0.9-1.0 ppm
    • About 6.5-8.0 ppm
    • About 2.1-2.6 ppm
    • About 3.3-4.5 ppm

  7. A spectrum of a compound C3H6O2 shows two singlets at 2.1 ppm (3H) and 3.7 ppm (3H). Which compound fits?

    • Propanoic acid
    • Propanal
    • Ethyl methanoate
    • Methyl ethanoate

  8. A compound C2H4Cl2 shows a doublet at about 1.8 ppm (3H) and a quartet at about 5.9 ppm (1H). Which compound fits?

    • Ethane-1,1-diol, CH(OH)2CH3
    • Chloroethene, CH2=CHCl
    • 1,1-dichloroethane, CHCl2CH3
    • 1,2-dichloroethane, ClCH2CH2Cl

  9. Which 1H pattern best fits an isopropyl group attached to a carbon with no other hydrogens?

    • A triplet (6H) and a triplet (1H)
    • A doublet (6H) and a septet (1H)
    • A singlet (6H) and a singlet (1H)
    • A quartet (6H) and a singlet (1H)

  10. How many 1H environments does p-xylene (1,4-dimethylbenzene) have?

    • 1
    • 2
    • 3
    • 4

  11. Why can two different structural isomers produce identical 1H NMR spectra?

    • Identical molar masses
    • Same functional groups
    • Equal boiling points
    • Identical proton environments

  12. What splitting pattern is shown by an isopropyl group, -CH(CH3)2, in 1H NMR?

    • Triplet and quartet
    • Singlet and doublet
    • Doublet and triplet
    • Doublet and septet

  13. Which functional group gives a 1H NMR peak at 9.5–10.0 ppm?

    • Carboxylic acid
    • Alcohol
    • Ketone
    • Aldehyde

  14. Which pair of signals in a 1H NMR spectrum indicates an ethyl ester group?

    • Triplet and quartet
    • Doublet and triplet
    • Doublet and septet
    • Singlet and doublet

  15. Why is the chemical shift of an alcohol OH proton in 1H NMR variable?

    • Spin-spin splitting
    • Carbon chain lengths
    • Deuterium exchange rates
    • Hydrogen bonding varies

  16. What is the splitting pattern of the CH2 signal in bromoethane, CH3CH2Br?

    • Triplet
    • Quartet
    • Singlet
    • Doublet

  17. What does a single peak in a 1H NMR spectrum indicate about a molecule?

    • No hydrogen atoms
    • One proton environment
    • One carbon atom
    • Symmetrical carbon backbone

  18. What is the typical 1H chemical shift of alkyl C-H protons away from functional groups?

    • 0.8-1.5 ppm
    • 6.5-8.0 ppm
    • 9.5-10.5 ppm
    • 4.5-6.5 ppm

  19. How many peaks appear in the 1H NMR spectrum of propanone, CH3COCH3?

    • Two
    • One
    • Three
    • Six

  20. Why does a proton environment produce a singlet peak in 1H NMR?

    • No adjacent protons
    • Identical chemical shift
    • Two adjacent protons
    • High magnetic field

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