Chemistry - f-block Question with Solution | TestHub

→ ${}_{58}{\mathrm{Ce}}^{+4}⟶[\mathrm{Xe}]4{\mathrm{f}}^{0}5{\mathrm{d}}^{0}6{\mathrm{s}}^0$

zero unpaired ${\mathrm{e}}^{\ominus }⟶$ diamagnetic & colourless

$\to {\mathrm{Ce}}^{+4}$ try to gain one ${\mathrm{e}}^{\ominus }$ & convert into ${\mathrm{Ce}}^{3+}$ most stable O.s, so act as a good O.A.