Answer to Question #301189 in Physical Chemistry for Yogesh

Question

The shielded proton requiring a external magnetic field of PMR signal is said to be absord upfield

Answer 1

The external magnetic field easily influence the electron density found around the nucleus of the hydrogen atom. ... This is called the shielding effect because the electron density is said to shield the proton in the nucleus from the external magnetic field by decreasing the net magnetic field that it experiences.