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The d-And-f-Block Elements

Short Answer Type

291.

Which is more basic, La(OH)₃ or Lu(OH)₃? Why?

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292.

Why is Ce⁴⁺ in aqueous solution is good oxidising agent.

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293.
Why do Zr and Hf exhibit similar properties?

Zr and Hf exhibit similar properties due to lanthanoid contraction. Electrons present in f subshell didn't do good shielding due to which with the increasing atomic number or increasing effective nuclear charge size gets constricted and size of Halfenium and Zirconium becomes almost equal.

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