The option that is true about the area under each signal in a 1H NMR spectrum is option e: It indicates the relative number of protons in the signal.
What is the spectrum
In a 1H NMR spectrum, the area under each signal corresponds to the relative number of protons contributing to that signal. The integration of the signal provides information about the proton abundance, allowing for the determination of the ratio of protons in different environments within a molecule.
Therefore, Since the NMR signal intensity is directly proportional to the number of equivalent protons, the area under each peak reflects their relative abundance.
See text below
Which of the following is true about the area under each signal in a 1H NMR spectrum?
It indicates the number of neighboring protons.
It indicates the number of different protons.
It indicates the electronic environment of neighboring protons.
It indicates the electronic environment of absorbing protons.
It indicates the relative number of protons in the signal.