The colourless species is

Options

A. `VCl_(3)`
B. `VOSO_(4)`
C. `Na_(3)VO_(4)`
D. `[V(H_(2)O)_(6)]SO_(4).H_(2)O`

Answer

C

Explanation

Species which have incompletely filled d-orbitals from coloured compounds whereas species with completely filled or vacant d-orbitals are colourless. `overset(+3" ")(V)Cl_(3)(coloured)" "V^(3+)=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(2),overset(+2" ")(V)CO_(4)(coloured)`
`V^(2+)=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3d^(3),`
Na_(3)overset(+5" ")(V)O_(4)("colourless")," "V^(5+)=1s^(2),2s^(2),2p^(6),3s^(2),3p^(6),3p^(6)``
`[overset(2+)(V)(H_(2)O)_(6)]SO_(4).H_(2)O("coloured"),underset(V^(2+)=1s^(2),2s^(2),2p^(6),3s^(2),3d^(3),3p^(6)`