Nuclear Magnetic Resonance Spectrometer(Analytical Instrumentation ) Questions and Answers
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.
True
False
May be True or False
Can't say
Explanation:-
Answer: 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.
True
False
May be True or False
Can't say
Explanation:-
Answer: Option A. -> True Answer: (a).True
Question 3. Which of the following is not involved in signal averaging?
A system to repeatedly scan the spectral region of interest
Some storage device to store information
A system to coherently add individual spectra
Sweep generator
Explanation:-
Answer: 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?
Power diode
Power transistor
Power MOSFET
Power IGBT
Explanation:-
Answer: 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?
Low-frequency component
High-frequency component
Low-voltage component
High-voltage component
Explanation:-
Answer: 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?
Integral spin
Half integral spin
Zero spin
Positive spin
Explanation:-
Answer: 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?
Field shift
Matrix effects
Chemical shift
Resonance shift
Explanation:-
Answer: Option C. -> Chemical shift Answer: (c).Chemical shift
Question 8. Which of the following is not a type of NMR spectrometer?
Minimal type
Maximal type
Multipurpose type
Wideline type
Explanation:-
Answer: 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.
True
False
May be True or False
Can't say
Explanation:-
Answer: Option A. -> True Answer: (a).True
Question 10. Elementary particles such as electrons and nucleus have the property of spin.