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Question

Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: Both ferromagnetic and ferromagnetic are strongly attracted by the magnetic field.
  1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
  2. If assertion is true but reason is false.
  3. If assertion Is false but reason is true.
  4. If both assertion and reason are true but reason is not the correct explanation of the assertion.


Solution

The correct option is B If assertion is true but reason is false.

On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic because the electrons change their spin.

Ferrimagnetic substances are weakly attracted by the magnetic field.

Hence, the statement given in the reason is false.

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