Which one of the following statements related to lanthanons is incorrect?

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All the lanthanons ae much more reactive than aluminium.

The basicity decreases as the ionic radius decreases from Pr to Lu

Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis

Europium shows +2 oxidation state

answer is C.

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Detailed Solution

All the lanthanoids ae much more reactive than aluminium. Like calcium first few members of Lanthanoids series are reactive. When their atomic number increases they act as a aluminium metal. First few members of Lanthanoids series are reactive.

We cannot compare Lanthanoids and aluminium reactivity because they belong to different blocks.

Not all Lanthanoids are more reactive than aluminium.

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