The incorrect statement among the following i | vedclass

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(B) The correct answer is $B$. Most trivalent Lanthanoid ions $(Ln^{3+})$ are colored in both solid and aqueous states due to $f-f$ transitions. Actin

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Most of the trivalent Lanthanoid ions are colorless in the solid state.

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(B) The correct answer is $B$. Most trivalent Lanthanoid ions $(Ln^{3+})$ are colored in both solid and aqueous states due to $f-f$ transitions. Actinoid contraction is indeed greater than Lanthanoid contraction because the $5f$ electrons provide poorer shielding than $4f$ electrons. Lanthanoids are typical metallic elements and are good conductors of heat and electricity. Actinoids are highly reactive metals,especially when finely divided,as they form a protective oxide layer slowly.

The incorrect statement among the following is:

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