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Knowing that the chemistry of lanthanoid...

Knowing that the chemistry of lanthanoids (Ln) is dominated by its `+3` oxidation state, which of the following statement is incorrect?

A

The ionic size 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.

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The correct Answer is:
B
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