Diamagnetic substances areI. weakly repelled by magnetic field.II. weakly magnetized in a magnetic field in opposite direction.III. those which have no unpaired electron.IV. pairing of electrons cancels their magnetic moment.Which of the above statement(s) is incorrect?

Diamagnetic substances are weakly repelled by magnetic field. H2O, NaCl and C6H6 are some of diamagnetic substances. They are weakly magnetized in a magnetic field in opposite direction. These have no unpaired electrons. pairing of electrons cancels their magnetic moment and they lose their magnetic character.