1. Analytical techniques
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2. In a mass spectrum the molecular ion
Question 1
In a mass spectrum the molecular ion A
is the tallest peak B
is the relative abundance C
corresponds to the molecular mass of a compound D
is the first ion to be detected

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4. High resolution mass spectrometry makes use of the fact that
Question 2
High resolution mass spectrometry makes use of the fact that A
isotopes do not have whole number masses B
molecules break into fragments C
atoms can be ionised more than once D
all masses are relative to carbon-12

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6. Question 3 A B C D The small peak to the right of the molecular ion
(m/z 92) is probably due to A
experimental error B
contamination C
doubly charged ion D
carbon-13 isotope

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8. Question 4 A B C D The y-axis on the mass spectrum shown is the
number of particles B
total number of particles C
relative abundance D
relative molecular mass

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10. What charge do ions have in a mass spectrometer?
Question 5
What charge do ions have in a mass spectrometer? A
Positive B
Mixture of positive and negative C
Negative D
Neutral

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12. Question 6
Infra-red spectrometry relies on the fact that all atoms joined by a chemical bond A
are electronegative B
have van der Waals’ forces C
spin D
vibrate

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14. The fingerprint region is between
Question 7
The fingerprint region is between A
1500 and 2500 cm-1 B
400 and 1500 cm-1 C
400 and 2500 cm-1 D
1000 and 1500 cm-1

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16. The fingerprint region is caused by
Question 8
The fingerprint region is caused by A B
vibrations of the spectrometer
vibrations between molecules C
vibrations of the whole molecule D
vibrations of contaminant molecules

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18. Question 9
Which compound will not have a similar IR spectrum to some of the others? A
propan-1-ol B
propan-2-ol C
propan-1,2-diol D
propan-1-al

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20. An IR spectrum identifies
Question 10
An IR spectrum identifies A
complicated molecules B
functional groups C
molecular masses D
organic compounds

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22. Congratulations!

23. Deduce the molecular formula of a molecule from the accurate mass of the molecular ion
Explain how fingerprinting of infra-red spectra allows molecules to be identified
Use infra-red spectra to identify functional groups and impurities
Explain how infra-red spectroscopy works and understand how it can be used to explain global warming