JEE Main 12 Jan 2019 Morning Question 26
Question: The pair of metal ions that can give a spin- only magnetic moment of 3.9 B.M. for the complex $ [M{{(H _2O)}_6}]Cl _2 $ is [JEE Main Online Paper Held On 12-Jan-2019 Morning]
Options:
A) $ C{r^{2+}}and,M{n^{2+}} $
B) $ {V^{2+}}and,C{o^{2+}} $
C) $ {V^{2+}}and,F{e^{2+}} $
D) $ C{o^{2+}}and,F{e^{2+}} $
Show Answer
Answer:
Correct Answer: B
Solution:
As ${H_2O}$ is a weak field ligand. It readily forms high spin complexes.
In $[M(H_2O)_6]CI_2$ , M exist in +2 oxidation state.
