NMR Spectroscopy Test

1. NMR is the study of the absorption of __________ by nuclei in a magnetic field.

Microwaves

Radio frequency radiation

Radioactive radiation

IR radiation

2. The amount of energy available in radio frequency radiation is sufficient for which of the following?

Vibrate a molecule

Vibrate an atom

Excite an atom

Affect the nuclear spin of an atom

3. The difference between the field necessary for resonance in the sample and in some arbitrary a chosen compound is which of the following?

Chemical shift

Resonance shift

Field shift

Matrix effects

4. NMR spectrometer provides ____________ and _____________ method of determining structure in soluble chemical compounds.

Inaccurate, destructive

Accurate, non-destructive

Accurate, destructive

Inaccurate, non-destructive

5. Chemical shift allows a chemist to obtain the idea of how atoms are joined together.

False

True

6. If the number of protons or neutrons is even the spin of the nucleus will be which of the following?

Half integral spin

Positive spin

Zero spin

Integral spin

7. NMR spectroscopy is used for determining structure in which of the following materials?

Radioactive materials

Liquids

Gases

Insoluble chemical compounds

8. Interaction between matter and electromagnetic radiation can be observed by subjecting a substance to magnetic fields in which of the following manner?

Both fields should be stationary

It must be subjected to only one field

One field should be stationary and the other should be varying

Both fields should be varying

9. In NMR spectroscopy, the spinning nuclei in a strong magnetic field must be irradiated by which of the following?

Parallel and weaker field

Perpendicular and weaker field

Parallel and stronger field

Perpendicular and stronger field

10. Elementary particles such as electrons and nucleus have the property of spin.

False

True