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 How many possible orientations do spin 1/2 nuclei have when they are located in an applied magnetic field? 2 3 6 4 2 3 6 4 ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis? Solubility Folding Molecular mass Isoelectric point Solubility Folding Molecular mass Isoelectric point ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy In scanning electron microscopy None of these a specimen is not fixed and then coated with thin layer of a heavy metal a specimen is fixed and then coated with thin layer of a heavy metal a specimen is fixed and then coated with transition metal None of these a specimen is not fixed and then coated with thin layer of a heavy metal a specimen is fixed and then coated with thin layer of a heavy metal a specimen is fixed and then coated with transition metal ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy What does the Michelson interferometer do? None of these Selectively filter certain wavelengths from a beam of I.R. radiation Split a polychromatic beam of radiation into its component wavelengths Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector None of these Selectively filter certain wavelengths from a beam of I.R. radiation Split a polychromatic beam of radiation into its component wavelengths Modulate the I.R. signal at a lower frequency, so that it can be observed by a detector ANSWER DOWNLOAD EXAMIANS APP
FT IR Spectroscopy Why is it advantageous to record many FID signals from the same sample and then add them together? To ensure that all target nuclei in the sample have been excited To increase sensitivity To remove inaccuracies caused by fluctuations in the applied magnetic field None of these To ensure that all target nuclei in the sample have been excited To increase sensitivity To remove inaccuracies caused by fluctuations in the applied magnetic field None of these ANSWER DOWNLOAD EXAMIANS APP
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