Which of the following is a colourless complex ion?

Options

A. `[Cu(NH_(3))_(4)]^(2+)`
B. `[Cr(H_(2)O)_(6)]^(3+)`
C. `[FeF_(6)]^(3-)`
D. `[Mn(H_(2)O)_(6)]^(3+)`

Answer

C

Explanation

Due to stable `t_(2g)^(2)e_(g)^(2)` configuration of `Fe^(3+)` ion.