The incorrect statement for lanthanides among the following statements is :

Options

A. 4f and 5d orbitals are so close in energy that it is very difficult to locate the exact position of electrons in lanthanides
B. Most common stable oxidation state is +3
C. Tripositive lanthanide ions have characteristic colour depending on nature of group with which they combine to form compounds
D. Some lanthanides ions absorb colour either in infrared or ultraviolet region of electromagnetic spectrum

Answer

D

Explanation

All but one `(Lu^(3+))`, lanthanide ions show absorptions in the visible of near UV region of the spectrum.