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 $\mathrm{Pr}$ to $\mathrm{Lu}$.
3. All the lanthanons are much more reactive than aluminium.
4. $\mathrm{Ce}\left(+4\right)$ solutions are widely used as oxidizing agent in volumetric analysis.

Solution

Asked in: NEET 2016 (Phase 2)

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