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Chemistry
Knowing that the chemistry of lanthanoids [Ln] is dominated by its +3 oxidation state, which of the following statements is incorrect?
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Q. Knowing that the chemistry of lanthanoids [Ln] is dominated by its +3 oxidation state, which of the following statements is incorrect?
NTA Abhyas
NTA Abhyas 2022
A
The ionic sizes of Ln-III decrease in general with increasing atomic number.
B
Ln-III compounds are generally colourless.
C
Ln-III hydroxides are mainly basic in character.
D
Because of the large size of the Ln-III ions the bonding in its compounds is predominantly ionic in character.
Solution:
As Ln-III compounds are mostly coloured due to presence of unpaired f electrons $\left[\right.f-fe^{-}transitions\left]\right.$ are possible