FT IR Spectroscopy When radiation energy is absorbed by a spin 1/2 nucleus in a magnetic field, what happens? The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field The processional frequency of the nucleus increases The nucleus spins faster None of these The angle of precession flips so that the magnetic moment of the nucleus opposes the applied field The processional frequency of the nucleus increases The nucleus spins faster None of these ANSWER DOWNLOAD EXAMIANS APP
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 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 ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy What does the Michelson interferometer do? Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector Split a polychromatic beam of radiation into its component wavelengths Selectively filter certain wavelengths from a beam of I.R. radiation None of these Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector Split a polychromatic beam of radiation into its component wavelengths Selectively filter certain wavelengths from a beam of I.R. radiation None of these ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy How many possible orientations do spin 1/2 nuclei have when they are located in an applied magnetic field? 3 4 2 6 3 4 2 6 ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy An FT-IR instrument record a signal in the none of these time domain frequency domain both (a) and (b) none of these time domain frequency domain both (a) and (b) ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy The sequence of amino acids in proteins can be determined by means of identification of the -COOH terminal amino acids identification of the -NH2 terminal amino acids partial cleavage of the original polypeptide into smaller polypeptides All of these identification of the -COOH terminal amino acids identification of the -NH2 terminal amino acids partial cleavage of the original polypeptide into smaller polypeptides All of these ANSWER DOWNLOAD EXAMIANS APP
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