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Q.

Select the correct statement(s) for the comparison of lanthanoids with actinoids.

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a

Magnetic properties of actinoids are more complex, with corresponding lanthanides having higher values

b

Actinoid contraction is greater from element to element due to poor shielding by 5f electrons

c

Lanthanoids have higher I.E.

d

All of the above

answer is D.

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Detailed Solution

Because actinoids have less shielding from the 5f-electrons than lanthanoids do from the 4f-electrons, the actinoid contraction is larger from element to element than the lanthanoid contraction.

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