Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

(A) Electronic configuration of ${\mathrm{Cr}}^{2+}$ and ${\mathrm{Mn}}^{3+}$

${\mathrm{Cr}}^{2+}=[\mathrm{Ar}]3{\mathrm{d}}^{4}4{\mathrm{s}}^0$

${\mathrm{Mn}}^{3+}=[\mathrm{Ar}]3{\mathrm{d}}^{4}4{\mathrm{s}}^0$

(B) ${\mathrm{Mn}}^{3+}$ is stable because of stable half - filled ${\mathrm{d}}^5$ configuration. So it acquire ${\mathrm{d}}^5$ configuration ${\mathrm{Mn}}^{3+}$ act as oxidizing agent.