1.

Which one of the following statements about lanthaniodesis false ?

Answer»

Lanthanides are sepearated from one another by ion exchange METHOD
The ionic radii of trivalent lanthanides steadily INCREASES with increases in atomic number
All lanthanides are highly dense metals
Most typical oxidation state of lanthanides is +3

Solution :The ionic radii of trivalent lanthanides steadily decreases with increases in atomic number DUE to lanthanidecontraction.


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