OnlineCBT
Chemistry · PYQ NEET UG 2025
हिन्दीGiven below are two statements : Statement I : Ferromagnetism is considered as an extreme form of paramagnetism. Statement II : The number of unpaired electrons in a \( \text{Cr}^{2+} \) ion \( (\text{Z} = 24) \) is the same as that of a \( \text{Nd}^{3+} \) ion \( (\text{Z} = 60) \). In the light of the above statements, choose the correct answer from the options given below :
Correct answer · Option 3
Statement I is true but Statement II is false
Explanation
Statement I is true. \( \text{Cr}^{2+} \) configuration is \( [\text{Ar}]3d^4 \) (4 unpaired electrons). \( \text{Nd}^{3+} \) configuration is \( [\text{Xe}]4f^3 \) (3 unpaired electrons). Hence Statement II is false.
