MCQ
Diamagnetic Lanthanoid ions are:
- A$Nd ^{3+}$ and $Eu ^{3+}$
- ✓$La ^{3+}$ and $Ce ^{4+}$
- C$Nd ^{3+}$ ad $Ce ^{4+}$
- D$Lu ^{3+}$ and $Eu ^{3+}$
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$Ag+ I^- \rightarrow AgI +e^-,$ $E^o = 0.152\, V$
$Ag \rightarrow Ag^+ +e^-,$ $E^o =-0.800\, V$
What is the value of log $K_{sp}$ for $AgI$ ? $(2. 303\, RT/F= 0. 059\, V)$
Reason : In mercury cell, the electrolyte is a paste of $KOH$ and $ZnO$.
(Atomic number of $\mathrm{Ga}=31$ )