The incorrect statement is:

Options

A. The spin-only magnetic moment of `[Ni(NH_(3))_(4) (H_(2)O)_(2)]^(2+)` is 2.83 BM.
B. The color of `[CoCl(NH_(3))_(5)]^(2+)` is violet as it absorbs the yellow light
C. The spin-only magnetic moments of `[Fe(H_(2)O)_(6)]^(2+)` and `[Cr(H_(2)O)_(6)]^(2+)` are nearly similar.
D. The gemstone, ruby, has `Cr^(3+)` ions occupying the octahedral sites of beryl

Answer

A

Explanation

The gemstone, ruby has `Cr^(3+)` ions having repeating unit `Al_(2)O_(3)Cr`. The formula of beryl is `Be_(3)Al_(2)Si_(6)O_(18)`.