Which one of the following statements related to lanthanons is incorrect ?
(1) Europium shows +2 oxidation state.
(2) The basicity decreases as the ionic radius decreases from Pr to Lu.
(3) All the lanthanons are much more reactive than aluminium.
(4) Ce (+4) solutions are widely used as oxidizing agent in volumetric analysis.
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All the lanthanoids are less reactive than aluminium. Because Lanthanoids are having high ionization potential values and shows inert pair effect.
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