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  3. Chemistry
  4. Which one of the following is ferromagnetic?

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Q. Which one of the following is ferromagnetic?

AMUAMU 2013The Solid State

Solution:

Substances which show permanent magnetism even in the absence of the magnetic field are called ferromagnetic substances, e.g., $Fe, Ni, Co, Gd$ and $ CrO_{2} $ are ferromagnetic substances.