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Chemistry
The incorrect statement among the following is :
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Q. The incorrect statement among the following is :
NEET
NEET 2021
The d-and f-Block Elements
A
Actinoid contraction is greater for element to element than Lanthanoid contraction.
18%
B
Most of the trivalent Lanthanoid ions are colorless in the solid state.
52%
C
Lanthanoids are good conductors of heat and electricity.
16%
D
Actinoids are highly reactive metals, especially when finely divided
14%
Solution:
Most of Lanthanoids in trivalent state are coloured due to unpaired electrons in $f$ - subshell. $La^{+3}, Lu^{+3}$ are colourless