Question:
How many of the following lanthanide elements exhibit +4 oxidation state?
Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy
How many of the following lanthanide elements exhibit +4 oxidation state?
Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy
Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy
Show Hint
Only a few lanthanides like Ce, Pr, Nd, Tb, and Dy show +4 oxidation state; most commonly they exhibit +3 state.
Updated On: Jun 4, 2025
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The Correct Option is A
Solution and Explanation
Step 1: Recall lanthanides that show +4 oxidation state.
Only a few lanthanides can show the +4 oxidation state under specific conditions. The known ones include: \[ \text{Ce}, \, \text{Pr}, \, \text{Nd}, \, \text{Tb}, \, \text{Dy} \] Step 2: Count these elements.
The total number is 5: Ce, Pr, Nd, Tb, Dy.
Only a few lanthanides can show the +4 oxidation state under specific conditions. The known ones include: \[ \text{Ce}, \, \text{Pr}, \, \text{Nd}, \, \text{Tb}, \, \text{Dy} \] Step 2: Count these elements.
The total number is 5: Ce, Pr, Nd, Tb, Dy.
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