The incorrect statement among the following is : (1) Actinoid contraction is greater for element to element than Lanthanoid contraction. (2) Most of the trivalent Lanthanoid ions are colorless in the solid state. (3) Lanthanoids are good conductors of heat and electricity. (4) Actinoids are highly reactive metals, especially when finely divided.
Option 2. Most of the trivalent lanthenoid ions are colourless in the solid state is incorrect statement. REASON:- Most of Lanthanoids in trivalent state are colored because of unpaired electrons in f - subshell. Only few of them are in coloured form.
