question_answer

The pair of metal ions that can give a spin- only magnetic moment of 3.9 B.M. for the complex \[[M{{({{H}_{2}}O)}_{6}}]C{{l}_{2}}\] is [JEE Main Online Paper Held On 12-Jan-2019 Morning]

A) \[C{{r}^{2+}}and\,M{{n}^{2+}}\]                

B) \[{{V}^{2+}}and\,C{{o}^{2+}}\]

C) \[{{V}^{2+}}and\,F{{e}^{2+}}\]                  

D)   \[C{{o}^{2+}}and\,F{{e}^{2+}}\]