Question

${Ti}^{2+}$ is purple while ${Ti}^{4+}$ is colorless, because:

• A. there is no crystal field effect in ${Ti}^{4+}$.
• B. ${Ti}^{4+}$ has ${3d}^2$ configuration.
• C. ${Ti}^{4+}$ has ${3d}^0$ configuration.
• D. ${Ti}^{4+}$ is very small cation when compared to ${Ti}^{2+}$, and hence does not absorb any radiation.

Answer 1

The correct option is C ${Ti}^{4+}$ has ${3d}^0$ configuration.

$T{i}^{4+}$ has $3d^0$ configuration. Hence, with no 3d electrons it is colourless.