Which of the following statement is not correct?

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La(OH)3 is less basic than Lu(OH)3

In lanthanide series ionic radius of Ln3+ * ions decreases

La is actually an element of transition series rather than lanthanide series

Atomic radii of Zr and Hf are same because of lanthanide contraction

answer is A.

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Detailed Solution

La(OH )3 is more basic than Lu(OH)3. This is because ionicsize of La3+ on is more than La3+ ion (Fajan's rule).

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