MCQ
Which one of the following sets correctly represents the increase in the paramagnetic property of the ions?
  • A
    $\mathrm{Ti}^{3+}<\mathrm{Fe}^{2+}<\mathrm{Cr}^{3+}<\mathrm{Mn}^{2+}$
  • B
    $\mathrm{Ti}^{3+}<\mathrm{Mn}^{2+}<\mathrm{Fe}^{2+}<\mathrm{Cr}^{3+}$
  • C
    $\mathrm{Mn}^{2+}<\mathrm{Fe}^{2+}<\mathrm{Cr}^{3+}<\mathrm{Ti}^{3+}$
  • $\mathrm{Ti}^{3+}<\mathrm{Cr}^{3+}<\mathrm{Fe}^{2+}<\mathrm{Mn}^{2+}$

Answer

Correct option: D.
$\mathrm{Ti}^{3+}<\mathrm{Cr}^{3+}<\mathrm{Fe}^{2+}<\mathrm{Mn}^{2+}$
No. of unpaired electrons $Ti^{3+}(1), Cr^{3+}(3), Fe^{2+ }(4)$ and $Mn^{2+} (5)$ Paramagnetism depends on the number of unpaired electrons

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