Chemistry - Complete d-block Question with Solution | TestHub

${\mathrm{Tl}}^{+}$ions are more stable than ${\mathrm{Tl}}^{3+}$ and thus, ${\mathrm{Tl}}^{3+}$ ions change to ${\mathrm{Tl}}^{+}$ions thereby acting as oxidising agents. ${\mathrm{Tl}}^{3+}$ compounds $+2e^{-}\to {\mathrm{Tl}}^{+}$compounds (less stable, oxidising agent) (more stable, reducing agent)