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

Options

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

Answer

B

Explanation

`d^(0)(Ti^(4+), Sc^(3+)` )and `d^(10)(Zn^(2+))` species will not absorb visible light and are colourless. `d^(3)(Cr^(3+))` can unbergo d-d-transition on absorption of visibla light of a particular wave length and will be coloured.