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JIPMER 2006
Exam
JIPMER
Year
2006
Subject
Chemistry
Chapter
d and f Block Elements

JIPMER 2006 · Chemistry · d and f Block Elements

Which of the following have maximum number of unpaired electrons?

Which of the following have maximum number of unpaired electrons?

Options

  1. AFe3+\mathrm{Fe}^{3+}
  2. BFe2+\mathrm{Fe}^{2+}
  3. CCo2+\mathrm{Co}^{2+}
  4. DCo3+\mathrm{Co}^{3+}

Correct answer

A. Fe3+\mathrm{Fe}^{3+}

Step-by-step solution

Fe3+⟶[Ar]3d54s0\mathrm{Fe}^{3+} \longrightarrow[\mathrm{Ar}] 3 d^5 4 s^0 Number of unpaired electrons =5=5.
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