Chemistry - Complete d-block Question with Solution | TestHub

(i)$In{\mathrm{VOSO}}_4,{}^{\text{'}}\mathrm{V}^{\text{'}}$is in$+4$oxidation state.
So it act as oxidising agent.
(ii)${\mathrm{Cr}}_2{\mathrm{O}}_3$is an amphoteric oxide.
(iii)$In{\mathrm{RuO}}_4,$$\text{'}\mathrm{Ru}\text{'}$is in$+8$oxidation state. So it act as oxidising agent.
(iv) Red colour of ruby is due to the presence of${\mathrm{Cr}}^{+3}$ions in${\mathrm{Al}}_2{\mathrm{O}}_2.$