Which one of the following statements related to lanthanons is incorrect ?A. Europium shows `+2` oxidation stateB. The basicity decreases as the ionic radius decreases form Pr to Lu.C. All the lanthanons are much more reactive than aluminiumD. `Ce(+4)` solution are widely used as oxidizing agent in volumetric analysis.

Which one of the following statements related to lanthanons is incorre

1.	Which one of the following statements related to lanthanons is incorrect ?A. Europium shows `+2` oxidation stateB. The basicity decreases as the ionic radius decreases form Pr to Lu.C. All the lanthanons are much more reactive than aluminiumD. `Ce(+4)` solution are widely used as oxidizing agent in volumetric analysis.
Answer» Correct Answer - B The basicity decreases as the ionic radius decreases form `Ce^(3+)` to `Lu^(3+)` . Thus `Ce(OH)_(3)` is the strongest base while `Lu(OH)_(3)` is the weakest base.

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