Which of the following statements related to lanthanoids is incorrect?
- ALanthanoids are silvery white soft metals.
- B$Samarium$ $(Sm)$ shows $+2$ oxidation state.
- C$Ce^{+4}$ solutions are widely used as oxidising agents in titrimetric analysis.
- DColour of lanthanoid ion in solution is due to $d-d$ transition.
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Identify the correct statements about lanthanoids:
$I$. $Ce^{4+}$ and $Tb^{4+}$ act as oxidising agents.
$II$. $Eu^{2+}$ and $Yb^{2+}$ act as reducing agents.
$III$. Mischmetal is an alloy of $95 \%$ lanthanoid metal and $5 \%$ iron.
$IV$. $La^{3+}$ and $Ce^{4+}$ are diamagnetic in nature.
$I$. $Ce^{4+}$ and $Tb^{4+}$ act as oxidising agents.
$II$. $Eu^{2+}$ and $Yb^{2+}$ act as reducing agents.
$III$. Mischmetal is an alloy of $95 \%$ lanthanoid metal and $5 \%$ iron.
$IV$. $La^{3+}$ and $Ce^{4+}$ are diamagnetic in nature.
Which of the following Lanthanoid ions are diamagnetic?
DifficultJEE MAIN 2024
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View SolutionMore number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is
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View SolutionWhat is the correct order of ionic radii for the $+3$ oxidation state in $Ce, La, Pm,$ and $Yb$?
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