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
Which pair of actinides exhibit the highest oxidation state of $+7$?
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 $Lu$
Match the properties given in List-$I$ with the elements given in List-$II$:
List-$I$ (Property) List-$II$ (Element) $(A)$ Lanthanoid showing $+4$ oxidation state $(i)$ $Pm$ $(B)$ Lanthanoid showing $+2$ oxidation state $(ii)$ $Ce$ $(C)$ Radioactive lanthanoid $(iii)$ $Lu$ $(D)$ Lanthanoid with $4f^7$ configuration in $+3$ state $(iv)$ $Eu$ $(E)$ Lanthanoid with $4f^{14}$ configuration in $+3$ state $(v)$ $Gd$ - $(vi)$ $Dy$
| List-$I$ (Property) | List-$II$ (Element) |
| $(A)$ Lanthanoid showing $+4$ oxidation state | $(i)$ $Pm$ |
| $(B)$ Lanthanoid showing $+2$ oxidation state | $(ii)$ $Ce$ |
| $(C)$ Radioactive lanthanoid | $(iii)$ $Lu$ |
| $(D)$ Lanthanoid with $4f^7$ configuration in $+3$ state | $(iv)$ $Eu$ |
| $(E)$ Lanthanoid with $4f^{14}$ configuration in $+3$ state | $(v)$ $Gd$ |
| - | $(vi)$ $Dy$ |
Medium
View SolutionWhich general symbol is used to represent lanthanoids?
Easy
View SolutionWhich of the following hydroxides is the most basic?
Easy
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