Select the correct reaction/ colour sequences for vanadium species.

(Assume that all colours are in aq. solution.)

The correct reaction for vanadium species are,

${\mathrm{V}}_2{\mathrm{O}}_4\stackrel{{\mathrm{H}}^{+}}{⟶}{\mathrm{VO}}^{2+}$

${\mathrm{V}}_2{\mathrm{O}}_5\stackrel{{\mathrm{OH}}^{-}}{⟶}{\mathrm{VO}}_4^{3-}$

${\mathrm{V}}_2{\mathrm{O}}_5\stackrel{{\mathrm{H}}^{+}}{⟶}{\mathrm{VO}}_2^{+}$

 The correct  colour sequences for vanadium species,

${\mathrm{VO}}_2^{+}\text{(yellow) }\to {\mathrm{VO}}^{2+}\text{ (blue) }\to {\mathrm{V}}^{3+}\left(\text{ green }\right)\to$${\mathrm{V}}^{2+}\text{ (purple/violet) }$