Amongst `TiF_(6)^(2-), CoF_(6)^(3-) , Cu_(2)Cl_2` and `NiCl_4^(2-)` (at. Nos. Ti=22, Co= 27, Cu = 29 Ni=28) the colourless species are

Options

A. `CoF_(6)^(3-) and NiCl_(4)^(2-)`
B. `TiF_(6)^(2-) and CoF_(6)^(3-)`
C. `Cu_(2)Cl_(2) and NiCl_4^(2-)`
D. `TiF_(6)^(2-) and Cu_(2)Cl_2`

Answer

D

Explanation

Oxidation state of
Ti in `TiF_(6)^(2-) = +4 i.e Ti^(4+) rarr 3d^0`
Co "in" `CoF_(6)^(3-) = + 2 i.e. Ni^(2+) rarr 3d^8`
`Cu "in" Cu_2Cl_2 = +1 i.e Cu^(+) rarr 3d^(10)`