The colourless species is

Options

A. `VCl_3`
B. `VOSO_4`
C. `Na_3VO_4`
D. `[V(H_2O)_6]SO_4 . H_2O`

Answer

C

Explanation

(A)`VCl_3 , ._23V^(3+) , [Ar]^16 3d^2=2` unpaired electrons.
(B)`VO^(2+) , V^(4+) , [Ar]^18 3d^2=1` unpaired electrons.
(C )`[VO_4]^(3-) , V^(5+) , [Ar]^18 3d^0=no` unpaired electrons.
(D)`[V (H_2O)_6]^(2+) , V^(2+) , [Ar]^18 3d^3=3` unpaired electrons.