Compound that is both paramagnetic and coloured is:

Options

A. `K_2Cr_2O_7`
B. `(NH_4)_2[TiCl_6]`
C. `VOSO_4`
D. `K_3[Cu(CN)_4]`

Answer

C

Explanation

`K_2Cr_2O_7" contains " Cr^(6+)(3d^0)`, which is diamagnetic but coloured due to charge transfer spectra.
`(NH_4)_2[TiCl_6]" contains "V^(4+)(3d^1)`, which is paramagnetic and coloured.
`K_3[Cu(CN)_4]" contain " Cu^(+)(3d^10)`, which is diamagnetic and colourless.