Which of the following statement is not correct?

Options

A. `Ti(NO_3)_4` is a colourless compound
B. `[Cu(NC CH_3)_4]^(+) BF_(4)^(-)` is a colourless compound
C. `[Cr(NH_3)_6]^(3+) 3Cl^(-)` is a coloured compound
D. `K_3[VF_6]` is a colourless compound

Answer

D

Explanation

The electronic configurations of `Ti^(4+), Cu^(+), Cr^(3+)` and `V^(3+)` are `(3d)^0, (3d)^(10), (3d)^3` and `(3d)^2` respectively. Hence, `K_3 [VF_6]` is a coloured compound as it contains two unpaired electrons