Discussion
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- Question
When placed in a magnetic field, all the random spins of the nuclei
Options- A. stop
- B. reverse direction
- C. align with the magnetic field
- D. rotate to 90° away from the induced field
- Correct Answer
- align with the magnetic field
- 1. Why is it important to use a deuterated solvent?
Options- A. NMR uses least of this solvent
- B. So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition
- C. Expensive solvents work best with NMR
- D. They dissolve polymer the fastest Discuss
- 2. Coupling causes the peaks in 1H NMR spectra to be split into
Options- A. two peaks
- B. multiple peaks equal to the number of hydrogens on surrounding atoms
- C. multiple peaks equal to the number of surrounding carbon atoms
- D. multiple peaks equal to the number of hydrogen on surrounding atoms, plus one Discuss
- 3. Better understanding of the nuclei is possible,
Options- A. with the help of wavelength spectrum
- B. with the help of frequencies ranges
- C. with the help of a mathematical translator called the fourier transfer algorithm
- D. none of the above Discuss
- 4. What is used to cool the superconducting coil?
Options- A. Hydrogen
- B. Ice
- C. Dry ice
- D. Liquid helium Discuss
- 5. What is shielding in NMR?
Options- A. Using a curved piece of metal to block an opponents attack
- B. Putting metal around an Rf source
- C. When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei
- D. Blocking parts of a molecule from Rf radiation Discuss
- 6. Cytochrome C has an isoelectric pH of
Options- A. 8.5
- B. 10.05
- C. 7.5
- D. 11.05 Discuss
- 7. Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis?
Options- A. Molecular mass
- B. Solubility
- C. Isoelectric point
- D. Folding Discuss
- 8. How do you turn a signal recorded in the time domain into a frequency domain signal?
Options- A. Fourier transformation
- B. Measurement of peak areas
- C. By use of a Michelson interferometer
- D. None of the above Discuss
- 9. Negative staining is a technique used in
Options- A. electron microscopy
- B. gel electrophoresis
- C. immunocytochemistry
- D. light microscopy Discuss
- 10. In scanning electron microscopy
Options- A. a specimen is fixed and then coated with thin layer of a heavy metal
- B. a specimen is fixed and then coated with transition metal
- C. a specimen is not fixed and then coated with thin layer of a heavy metal
- D. none of the above Discuss
NMR Spectroscopy problems
Search Results
Correct Answer: So the spectrometer can lock onto the sample to prevent the spectrum from drifting during aquisition
Correct Answer: multiple peaks equal to the number of hydrogen on surrounding atoms, plus one
Correct Answer: with the help of a mathematical translator called the fourier transfer algorithm
Correct Answer: Liquid helium
Correct Answer: When the magnetic moment of an atom blocks the full induced magnetic field from surrounding nuclei
Correct Answer: 10.05
Correct Answer: Isoelectric point
Correct Answer: Fourier transformation
Correct Answer: electron microscopy
Correct Answer: a specimen is fixed and then coated with thin layer of a heavy metal
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