D-And F-Block Elements Ques 423
Question: Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other in
[AIIMS 2005]
Options:
A) $ T{{l}^{+}},\ T{{l}^{3+}} $
B) $ C{{u}^{+}},\ C{{u}^{2+}} $
C) $ C{{r}^{2+}},\ C{{r}^{3+}} $
D) $ {{V}^{2+}},\ V{{O}^{2+}} $
Show Answer
Answer:
Correct Answer: A
Solution:
$Tl^{+}$ ions are more stable than $Tl^{3+}$ and thus, $Tl^{3+}$ ions change to $Tl^{+}$ ions thereby acting as oxidising agents.
$Tl^{3+}$ compounds + 2e $\rightarrow$ $Tl^{+}$ compounds
