Which of the following complex ions is expected to absorb visible light?

Options

A. `[Sc(H_(2)O)_(3)(NH_(3))_(3)]^(3+)`
B. `[Ti(en)_(2)(NH_(3))_(2)]^(4+)`
C. `[Cr(NH_(3))_(6)]^(3+)`
D. `[Zn(NH_(3))_(6)]^(2+)`

Answer

C

Explanation

`Cr^(3+)` in the complex has unpaired electrons in the d orbital.