Given below are two statements : Statement I: Ferromagnetism is considered as an extreme form of paramagnetism. Statement II : The number of unpaired electrons in a Cr^2+ ion (Z=24) is the same as that of a Nd^3+ ion (Z=60) . In the light of the above statements, choose the correct answer from the options given below :

Statement I is true but Statement II is false

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Both Statement I and Statement II are false

D and F Block Elements PYQ — NEET 2025 · Q102 with Solution

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Correct answer: A

Substances that are strongly attracted in an applied magnetic field are known as ferromagnetic. Ferromagnetism is, in fact, considered as an extreme form of paramagnetism. Therefore, Statement I is correct.

For the ion $\mathrm{Cr}^{2+}$, the electronic configuration is $3d^4 \, 4s^0$, resulting in 4 unpaired electrons.

For the ion $\mathrm{Nd}^{3+}$, the electronic configuration is $4f^3 \, 6s^0$, resulting in 3 unpaired electrons.

Hence, Statement II is incorrect.

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Correct answer: A

For the ion $\mathrm{Cr}^{2+}$, the electronic configuration is $3d^4 \, 4s^0$, resulting in 4 unpaired electrons.

For the ion $\mathrm{Nd}^{3+}$, the electronic configuration is $4f^3 \, 6s^0$, resulting in 3 unpaired electrons.

Hence, Statement II is incorrect.

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