WBJEE · Chemistry · d and f Block Elements
Which pair of ions among the following can be separated by precipitation method?
- A Eu(II) and Dy(III)
- B Gd(III) and Dy(III)
- C \(\mathrm{Eu}(\mathrm{II})\) and \(\mathrm{Yb}(\mathrm{II})\)
- D Eu(II) and Gd(II)
Answer & Solution
Correct Answer
(D) Eu(II) and Gd(II)
Step-by-step Solution
Detailed explanation
\(\mathrm{A} \rightarrow \mathrm{Eu}^{+2}\) and \(\mathrm{yb}^{2+}\) have unique property \& show similarity with \(\mathrm{Sr}^{+2}\). Hence \(\mathrm{EuSO}_4\) is insoluble like \(\mathrm{SrSO}_4\) & other lanthanide ions remains unaffected in solution.…
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