
NMR Spectroscopy Quiz
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University
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Practice Problem
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Hard
amey das
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the fundamental principle of NMR spectroscopy?
Absorption of visible light
Interaction of nuclear spins with an external magnetic field
Excitation of electrons to higher energy levels
Emission of X-rays
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of nuclei can be analyzed using NMR spectroscopy?
Only nuclei with an even mass number
Only nuclei with an odd mass number
Nuclei with a nonzero spin quantum number
All atomic nuclei
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to a nucleus when it absorbs radiofrequency energy in NMR?
It undergoes nuclear fission
It transitions between nuclear spin states
It emits fluorescence
It undergoes chemical ionization
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following factors primarily determines the chemical shift in NMR?
The mass of the nucleus
The strength of the external magnetic field
The electronic environment surrounding the nucleus
The temperature of the sample
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is shielding in NMR spectroscopy?
The protection of nuclei from the applied magnetic field
The reduction of the effective magnetic field experienced by a nucleus due to surrounding electrons
The removal of external interference in the NMR instrument
The excitation of nuclei to higher energy levels
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the reference standard used in proton NMR?
CDCl₃
Tetramethylsilane (TMS)
Deuterium oxide (D₂O)
Ethanol
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following increases the resolution of an NMR spectrum?
Increasing the temperature
Decreasing the magnetic field strength
Increasing the magnetic field strength
Using a non-polar solvent
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