Chemistry - Complete d-block Question with Solution | TestHub

The ions ${\mathrm{Ti}}^{+2},{\mathrm{V}}^{+2}{\mathrm{Cr}}^{+2}$ are strong reducing agents and will liberate hydrogen from a dilute acid, eg. $2{\mathrm{Cr}}_{\text{(aq.) }}^{+2}+2{\mathrm{H}}_{(\text{aq.) }}^{+}⟶2{\mathrm{Cr}}_{(\text{aq.) }}^{+3}+{\mathrm{H}}_2(\mathrm{g})$