Enter the number of unique signals in the 1h nmr spectrum of ethanol. assume that the hydroxy proton does not exchange with the nmr solvent.

In the 1H NMR spectrum of ethanol three different signals are observed, this is due to the existence of 3 types of hydrogens with different chemical environment. Hydrogens A (3.57 ppm) are more screened than C (1.10 ppm) due to the presence of oxygen (electonegative atom that removes electron density). The chemical environment of hydrogen B (4.78 ppm), attached directly to oxygen, is also different by resonating at a frequency different from the previous ones.

The hydroxylic hydrogen produces a singlet, the pair of carbon hydrogens one give rise to a quadruplet and the three hydrogens of carbon two produce a triplet.

Explanation:

The property of a substance that is composed of atoms that are held together by metallic bond is that it can be flattened and bent. Metals possess this bond between their atoms that is why they can be beaten flat and bent. This property of metals is called ductility.