Knowing that the chemistry of lanthanoids (Ln) is dominated by its `+3` oxidation state, which of the following statement is incorrect?

Options

A. Because of the large size of the Ln (III) ions, the bonding in its compounds is predominatly ionic in character
B. The ionic sizes of Ln (III) decrease in general with increasing atomic number
C. Ln (III) compounds are generally colourless
D. Ln (III) hydroxides are mainly basic in character

Answer

C

Explanation

Lanthanoids in +3 oxidation state usually have unpaired electron in f-subshell and impart characteristic transition (except lanthanum and lutetium).