Question

Diamagnetic substances are
I. weakly repelled by magnetic field.
II. weakly magnetised 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?

• A. Only $I$
• B. Only $II$
• C. Only $III$
• D. None of these

Answer 1

Answer: (D)

Diamagnetic substances are weakly repelled by magnetic field. $H _{2} O , NaCl$ and $C _{6} H _{6}$ are some of diamagnetic substances. They are weakly magnetised 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.