Sensivity Enhancement for NMR Spectroscopy MCQ

Test your knowledge with important Sensivity Enhancement for NMR Spectroscopy MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Sensivity Enhancement for NMR Spectroscopy MCQs at Bissoy

• In Spin Decoupler, the difference frequency circuit provides a means of mixing two signals and a filter to recover which of the following?
  ক

  Low-frequency component

  খ

  High-frequency component

  গ

  Low-voltage component

  ঘ

  High-voltage component
• 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?
  ক

  Power diode

  খ

  Power transistor

  গ

  Power MOSFET

  ঘ

  Power IGBT
• In order to have a long measuring time for increasing sensitivity, it is better to have several fast scans than a single slow scan.
  ক

  True

  খ

  False
• Which of the following is not involved in signal averaging?
  ক

  A system to repeatedly scan the spectral region of interest

  খ

  Some storage device to store information

  গ

  A system to coherently add individual spectra

  ঘ

  Sweep generator
• 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.
  ক

  True

  খ

  False
• Suppression of frequencies which contain no signal does which of the following?
  ক

  Increases S/N ratio

  খ

  Decreases S/N ratio

  গ

  S/N ratio is kept constant

  ঘ

  S/N ratio becomes 1
• Frequency spectrum of noise occupies a band that is _________ the signal spectrum. Choose the most appropriate option.
  ক

  Narrow than

  খ

  Wider than

  গ

  Different from

  ঘ

  Same as
• Better sensitivity with good resolution can be achieved by concentrating the sample inside which of the following?
  ক

  Sample cell

  খ

  Micro cell

  গ

  Sample tube

  ঘ

  Cylindrical tube
• The most common spherical cells have which of the following dimensions?
  ক

  4mm diameter

  খ

  40mm diameter

  গ

  8mm diameter

  ঘ

  80mm diameter
• Which of the following techniques do not enhance sensitivity by a factor of 10 at normal operating conditions?
  ক

  Optimization of sample volume

  খ

  Optimization of instrumental parameters

  গ

  Optimization of noise

  ঘ

  Time averaging
• Which of the following is not an operating technique for sensitivity enhancement?
  ক

  Optimization of sample volume

  খ

  Optimization of instrumental parameters

  গ

  Optimization of noise

  ঘ

  Time averaging
• Sensitivity is the ratio of peak signal amplitude to which of the following?
  ক

  Time

  খ

  Rms noise

  গ

  Average noise

  ঘ

  Peak-to-peak noise