Which of the following statements is not correct ?A. `La(OH)_(3)` is less BASIC than `Lu(OH)_(3)`B. In lanthanide series ionic of `Ln^(2+)` ion decreasesC. La is actully an element of transition series rather lanthanide series.D. Atomic radius of Zr and Hf are same because of lanthanide contraction

Which of the following statements is not correct ?A. `La(OH)_(3)` is l

1.	Which of the following statements is not correct ?A. `La(OH)_(3)` is less BASIC than `Lu(OH)_(3)`B. In lanthanide series ionic of `Ln^(2+)` ion decreasesC. La is actully an element of transition series rather lanthanide series.D. Atomic radius of Zr and Hf are same because of lanthanide contraction
Answer» Correct Answer - A The basic strength of `Ln(OH)_(3)` decreases as the ionic radius decreases form Ce to Lu. Thus `Ce(OH)_(3)` is the most basic, and `Lu(OH)_(3)` , is the least basic.

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Which of the following statements is not correct ?A. `La(OH)_(3)` is less BASIC than `Lu(OH)_(3)`B. In lanthanide series ionic of `Ln^(2+)` ion decreasesC. La is actully an element of transition series rather lanthanide series.D. Atomic radius of Zr and Hf are same because of lanthanide contraction

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