Answer» - Ferromagnetism : The molecular domains of ferromagnetic substances get aligned in the same direction under the influence of electric or magnetic field permanently. The property exhibited by such substances is known as ferromagnetism. Such substances can be made into permanent magnet, e.g. Fe, Ni, Co, CrO2 etc.
- Paramagnetism : Paramagnetic substances are weakly attracted towards the magnetic field and the properties of paramagnetism is due to the presence of unpaired electrons. It behaves as magnet only in magnetic field, e.g. O2, Cu2+, Fe3+ etc.
- Antiferromagnetism : The molecular domains of such substances get aligned in parallel are antiparallel direction in equal number, hence such substances cannot be magnetised and are neutral towards the magnet, e.g. MnO, Fe2O3, FeO etc.
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