Which of the Following Statements Is TRUE

question 76

Multiple Choice

Which of the following statements is TRUE?

• A) A common reference compound for ¹H and ¹³C NMR is tetramethylmethane.
• B) Nuclear magnetic resonance spectroscopy uses the fact that some atomic nuclei, such as ¹H and ¹³C, have two nuclear spin states with different energies under an applied magnetic field.
• C) The energy difference between two nuclear spin states corresponds to the energy of photons in the microwave part of the electromagnetic spectrum.
• D) The energy difference between two nuclear spin states depends on the number of protons and neutrons in the atomic nucleus.
• E) The difference in absorption frequency of a nucleus outside the magnetic field and a nucleus inside the external magnetic field is called the chemical shift.

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Definitions:

Political Power

The capacity or ability of a person or group to influence or control the actions and outcomes within a society or political body.

Risorgimento

The social and political movement that culminated in the unification of Italy in the 19th century, marked by revolutions, wars, and the consolidation of different states and kingdoms into a single nation.

Italian Word

Words or vocabulary that are part of the Italian language, a Romance language spoken mainly in Italy and Switzerland.

Resurgence

refers to a renewal or revival of activity, interest, or attention after a period of decline or dormancy.