Class JEE Chemistry ALL Q #1227
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4 Marks 2026 JEE Main 2026 (Online) 22 January Morning Shift MCQ SINGLE
Arrange the given metal ion in increasing order of unpaired electron in low spin complexes formed by $Mn^{3+}, Cr^{3+}, Fe^{3+}, Co^{3+}$ :
(A) $Mn^{3+}\lt Cr^{3+}\lt Fe^{3+}\lt Co^{3+}$
(B) $Co^{3+}\lt Fe^{3+}\lt Mn^{3+}\lt Cr^{3+}$
(C) $Co^{3+} \lt Fe^{3+} \lt Cr^{3+} \lt Mn^{3+}$
(D) $Fe^{3+} \lt Co^{3+} \lt Mn^{3+} \lt Cr^{3+}$
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