Co-Ordination Compounds Question 115
Question: Among the following ions which one has the highest paramagnetism
[IIT 1993; UPSEAT 2002]
Options:
A) $ {{[ Cr{{(H_2O)}_6} ]}^{3+}} $
B) $ {{[ Fe{{(H_2O)}_6} ]}^{2+}} $
C) $ {{[ Cu{{( H_2O )}_6} ]}^{2+}} $
D) $ {{[ Zn{{( H_2O )}_6} ]}^{2+}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ {{[Fe{{(H_2O)}_6}]}^{2+}} $ has four unpaired electrons, $ {{[Cr{{(H_2O)}_6}]}^{3+}}, $
$ {{[Cu{{(H_2O)}_6}]}^{2+}} $ and $ {{[Zn{{(H_2O)}_6}]}^{2+}} $ have 3, 1, 0 unpaired electrons respectively.
