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Write the consequences of lanthanide contraction?

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Consequences of Lanthanide Contraction:
Due to this the separation of elements in the pure state is hard.
It affects the basic strength of hydroxides.
As the size of lanthanides decreases from La to Lu due to which the covalent character of the hydroxides increases and hence basic strength decreases.

Final Answer: Due to the lanthanide contraction separation of elements in the pure state is hard.
It affects the basic strength of hydroxides.

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