Which of the following statements is wrong regarding lanthanoids?
- A$Ln(III)$ compounds are generally colourless.
- B$Ln(III)$ compounds are predominantly ionic in character.
- CThe ionic size of $Ln(III)$ ions decreases with increasing atomic number.
- D$Ln(III)$ hydroxides are mainly basic in nature.
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Similar Questions
The number of elements from the following that do not belong to lanthanoids is:
$Eu, Cm, Er, Tb, Yb$ and $Lu$
$Eu, Cm, Er, Tb, Yb$ and $Lu$
Determine the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ The symbol for Lanthanum is $La$.
$(b)$ The name of the element $Lu$ is Lanthanum.
$(c)$ The electronic configuration of $La^{3+}$ and $Ce^{4+}$ contains $4f^0$.
$(a)$ The symbol for Lanthanum is $La$.
$(b)$ The name of the element $Lu$ is Lanthanum.
$(c)$ The electronic configuration of $La^{3+}$ and $Ce^{4+}$ contains $4f^0$.
Difficult
View SolutionArrange the ions $Ce^{+3}, La^{+3}, Pm^{+3},$ and $Yb^{+3}$ in the increasing order of their ionic radii.
Medium
View SolutionDetermine whether the following statements are True $(T)$ or False $(F)$:
$(a)$ Actinoid contraction increases from one element to the next.
$(b)$ Actinoid contraction decreases from one element to the next.
$(c)$ Lanthanoid contraction occurs,but actinoid contraction does not occur.
$(a)$ Actinoid contraction increases from one element to the next.
$(b)$ Actinoid contraction decreases from one element to the next.
$(c)$ Lanthanoid contraction occurs,but actinoid contraction does not occur.
Difficult
View SolutionWhich of the following $f$-block elements exhibits the highest oxidation state?
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