19B.1 13C and 1H NMR spectroscopy Quiz: Pearson Edexcel Chemistry, Unit 19

The 20 questions

1. How many 13C NMR peaks does propanone, CH3COCH3, show?

   • 1
   • 3
   • 2
   • 6

2. How many 13C NMR peaks does ethanol show?

   • 2
   • 3
   • 4
   • 1

3. How many 13C NMR peaks does butan-2-one, CH3COCH2CH3, show?

   • 5
   • 4
   • 3
   • 2

4. What is the typical 13C chemical shift range of a ketone carbonyl carbon?

   • About 10-50 ppm
   • About 110-160 ppm
   • About 50-90 ppm
   • About 200-220 ppm

5. What is the typical 13C chemical shift range of an aromatic carbon?

   • About 200-220 ppm
   • About 110-160 ppm
   • About 170-185 ppm
   • About 10-50 ppm

6. What reference compound sets 0 ppm in NMR spectra?

   • Chloroform, at 7.3 ppm
   • Tetramethylsilane (TMS)
   • Sodium chloride, at 100 ppm
   • Water, at 4.7 ppm

7. What is the typical 1H chemical shift of an aldehyde proton?

   • 2-3 ppm
   • 4-5 ppm
   • 7-8 ppm
   • 9-10 ppm

8. What is the typical 1H chemical shift of protons on a carbon bonded to an oxygen atom, such as the CH2 in ethanol?

   • 5.0-6.0 ppm
   • 3.5-4.5 ppm
   • 10-12 ppm
   • 0.5-1.5 ppm

9. In the 1H NMR spectrum of ethanol, what is the ratio of peak areas for CH3 : CH2 : OH?

   • 2:3:1
   • 1:2:3
   • 3:1:2
   • 3:2:1

10. What splitting pattern is seen for a CH2 group adjacent to a CH3 group?

    • A doublet
    • A triplet
    • A quartet
    • A singlet

11. What splitting pattern is seen for a CH3 group adjacent to a CH2 group?

    • A singlet
    • A quartet
    • A triplet
    • A doublet

12. What splitting pattern is seen for a CH3 group with no adjacent hydrogen atoms?

    • A quartet
    • A triplet
    • A singlet
    • A doublet

13. A 1H NMR spectrum shows a singlet at 2.1 ppm (3H) and a singlet at 3.7 ppm (3H). Which compound fits?

    • Propanone, CH3COCH3
    • Ethyl methanoate, HCOOCH2CH3
    • Methyl ethanoate, CH3COOCH3
    • Propanal, CH3CH2CHO

14. How many 1H environments does ethanal, CH3CHO, have?

    • 2
    • 4
    • 1
    • 3

15. How many 1H environments does propan-2-ol have?

    • 2
    • 4
    • 5
    • 3

16. A 1H NMR spectrum of an aromatic compound shows a peak near 7.2 ppm integrating to 5H. What does this suggest?

    • A carboxylic acid group, which gives a broad peak near 11 ppm for the acid proton
    • An aldehyde group, which gives a strong peak near 9.8 ppm in the spectrum
    • A terminal alkene with a CH2 group, which absorbs strongly near 5 ppm
    • A monosubstituted benzene ring

17. A spectrum shows a doublet at 1.2 ppm (6H), a septet at 4.0 ppm (1H) and an OH peak at 2.0 ppm (1H). Which compound fits?

    • Propanal
    • Propanone
    • Propan-1-ol
    • Propan-2-ol

18. How many 13C environments does p-xylene (1,4-dimethylbenzene) have?

    • 4
    • 3
    • 6
    • 2

19. Which typical 1H chemical shift range is expected for a proton on a C=C in an alkene?

    • 11-12 ppm
    • 0.8-1.5 ppm
    • 4.5-6.5 ppm
    • 9.5-10.5 ppm

20. Which typical 1H chemical shift range is expected for a carboxylic acid OH proton?

    • 6-7 ppm
    • 2-3 ppm
    • 0-1 ppm
    • 10-12 ppm

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