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Chemistry · PYQ NEET UG 2024
हिन्दी'Spin only' magnetic moment is same for which of the following ions? A. \( \text{Ti}^{3+} \) B. \( \text{Cr}^{2+} \) C. \( \text{Mn}^{2+} \) D. \( \text{Fe}^{2+} \) E. \( \text{Sc}^{3+} \) Choose the most appropriate answer from the options given below:
Correct answer · Option 3
B and D only
Explanation
\( \text{Cr}^{2+} \) (\( d^4 \)) and \( \text{Fe}^{2+} \) (\( d^6 \)) both contain 4 unpaired electrons (\( n=4 \)), giving them identical spin-only magnetic moments of \( \sqrt{4(4+2)} = \sqrt{24} \text{ BM} \).
