The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are A. Cr 2+ B. Fe 2+ C. Fe 3+ D. Co 2+ E. Mn 3+ Choose the correct answer from the options given below:

Chemistry · Coordination Compounds

JEE Main 2025 — 3 April, Morning Shift — Question 11

The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are

A. $\mathrm{Cr}^{2+}$

B. $\mathrm{Fe}^{2+}$

C. $\mathrm{Fe}^{3+}$

D. $\mathrm{Co}^{2+}$

E. $\mathrm{Mn}^{3+}$

Choose the correct answer from the options given below:

$\mu=4.9 \mathrm{BM}$

$\mathrm{n}=4$ for $\mathrm{Cr}^{2+} ; \mathrm{Fe}^{2+} ; \mathrm{Mn}^{3+}$ (where $\mathrm{n}=$ unpaired electron)

Answer key and solution verified before publishing.

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