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Give reasons for the following.
Trivalent Lanthanoid ions such as ( ) and ( ) do not show any colour in their solution. Give a…
Trivalent Lanthanoid ions such as $\text{La}^{3+}$ ($Z = 57$) and $\text{Lu}^{3+}$ ($Z = 71$) do not show any colour in their solution. Give a reason.
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From ISC 2024 Chemistry Paper 1, question 11(ii).