The 1H NMR spectrum of bromoethane shows a signal at 3.5ppm when the spectrum is recorded using a 60-MHz spectrometer. Where do you expect to see the signal if a 300- MHz instrument is used instead? A) 3.5 ppm B) 7.5 ppm C) 6.8 ppm D) 5.8 ppm E) none of these

A) 3.5 ppm

Explanation:

The signal still retains it position at 3.5ppm. This is because change in frequency of the spectrometer does not change the chemical shift values. It only changes the intensity of the signal.

As a rule of thumb; higher frequency, better resolution in NMR.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.