Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Which of the following statements is wrong regarding lanthanoids?
A
In(III) compounds are predominantly ionic in character.
B
Ln(III) hydroxides are mainly basic in nature.
C
The ionic size of 
ions decreases with increasing atomic number.
ions decreases with increasing atomic number.
D
compounds are generally colourless.
Text Solution
Verified by ExpertsThe correct answer is:
D
: Many of the trivalent ions of lanthanoids are coloured, both in the solid state as well as in solution. The colour of lanthanoid ions arises
due to absorption of light from visible region of spectrum resulting in 
ftransitions as lanthanoids have partly filled 
-orbitals.
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