AIIMS 2019 Chemistry Ferromagnetism MCQ Question
Assertion: & both exist.
Reason: Both have same valence electrons.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
Ferromagnetic compounds exhibit strong magnetic properties due to the alignment of their electron spins, which leads to a net magnetic moment. In a magnetic field, these materials become magnetized as the majority of their electron spins align in the direction of the field, resulting in a significant attraction. However, the statement that "its electrons may or may not be aligned in the same direction" is misleading, as ferromagnetic materials typically have a predominant alignment of spins in the presence of a magnetic field, making option C appropriate. Options A and B are incorrect because they misinterpret the nature of ferromagnetism; ferromagnetic materials are characterized by a tendency for electron alignment, which is essential for their strong attraction to magnetic fields.
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