The incorrect statement among the following is :

Question

The incorrect statement among the following is : (A) Actinoid contraction is greater for element to element than Lanthanoid contraction. (B) Most of the trivalent Lanthanoid ions are colorless in the solid state. (C) Lanthanoids are good conductors of heat and electricity. (D) Actinoids are highly reactive metals, especially when finely divided

Tardigrade Admin · Accepted Answer

Most of Lanthanoids in trivalent state are coloured due to unpaired electrons in f - subshell. La+3, Lu+3 are colourless

Q. The incorrect statement among the following is :

Actinoid contraction is greater for element to element than Lanthanoid contraction.

Most of the trivalent Lanthanoid ions are colorless in the solid state.

Lanthanoids are good conductors of heat and electricity.

Actinoids are highly reactive metals, especially when finely divided

Most of Lanthanoids in trivalent state are coloured due to unpaired electrons in $f$ - subshell. $L a^{+ 3}, L u^{+ 3}$ are colourless

Q. The incorrect statement among the following is :

Actinoid contraction is greater for element to element than Lanthanoid contraction.

Most of the trivalent Lanthanoid ions are colorless in the solid state.

Lanthanoids are good conductors of heat and electricity.

Actinoids are highly reactive metals, especially when finely divided

Most of Lanthanoids in trivalent state are coloured due to unpaired electrons in f - subshell. La+3,Lu+3 are colourless

Most of Lanthanoids in trivalent state are coloured due to unpaired electrons in $f$ - subshell. $L a^{+ 3}, L u^{+ 3}$ are colourless