FT IR Spectroscopy
The frequency of precession, the transition frequency and the Larmor frequency are

different terms for the same frequency
different terms for the different frequency
same terms for the different frequency
same terms for the same frequency

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FT IR Spectroscopy
Why is it advantageous to record many FID signals from the same sample and then add them together?

To increase sensitivity
None of these
To remove inaccuracies caused by fluctuations in the applied magnetic field
To ensure that all target nuclei in the sample have been excited

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FT IR Spectroscopy
In FT-NMR, how are nuclei excited?

By an intense pressure
By radio-frequency radiation whose frequency is swept across a predetermined range
By an intense pulse of radiation which contains a wide range of frequencies
None of these

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