Analytical Instrumentation

NUCLEAR MAGNETIC RESONANCE SPECTROMETER MCQs

Total Questions : 61

Page 1 of 7 pages
Question 1. The amplitude of the NMR signal caused by the absorption of RF energy at the radio frequency does not depend upon the power of the RF energy applied.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option B. -> False
Answer: (b).False
Question 2. In order to have a long measuring time for increasing sensitivity, it is better to have several fast scans than a single slow scan.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option A. -> True
Answer: (a).True
Question 3. Which of the following is not involved in signal averaging?
  1.    A system to repeatedly scan the spectral region of interest
  2.    Some storage device to store information
  3.    A system to coherently add individual spectra
  4.    Sweep generator
 Discuss Question
Answer is Option D. -> Sweep generator
Answer: (d).Sweep generator
Question 4. In Spin Decoupler, the output of the DC amplifier is applied to which of the following to control the power supplied to the oven heaters?
  1.    Power diode
  2.    Power transistor
  3.    Power MOSFET
  4.    Power IGBT
 Discuss Question
Answer is Option B. -> Power transistor
Answer: (b).Power transistor
Question 5. In Spin Decoupler, the difference frequency circuit provides a means of mixing two signals and a filter to recover which of the following?
  1.    Low-frequency component
  2.    High-frequency component
  3.    Low-voltage component
  4.    High-voltage component
 Discuss Question
Answer is Option A. -> Low-frequency component
Answer: (a).Low-frequency component
Question 6. If the number of protons or neutrons is even the spin of the nucleus will be which of the following?
  1.    Integral spin
  2.    Half integral spin
  3.    Zero spin
  4.    Positive spin
 Discuss Question
Answer is Option C. -> Zero spin
Answer: (c).Zero spin
Question 7. The difference between the field necessary for resonance in the sample and in some arbitrary a chosen compound is which of the following?
  1.    Field shift
  2.    Matrix effects
  3.    Chemical shift
  4.    Resonance shift
 Discuss Question
Answer is Option C. -> Chemical shift
Answer: (c).Chemical shift
Question 8. Which of the following is not a type of NMR spectrometer?
  1.    Minimal type
  2.    Maximal type
  3.    Multipurpose type
  4.    Wideline type
 Discuss Question
Answer is Option B. -> Maximal type
Answer: (b).Maximal type
Question 9. Chemical shift allows a chemist to obtain the idea of how atoms are joined together.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option A. -> True
Answer: (a).True
Question 10. Elementary particles such as electrons and nucleus have the property of spin.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer is Option A. -> True
Answer: (a).True