question_answer

Which of the following complex has zero magnetic moment (spin only)?

A)  \[[Ni{{(N{{H}_{3}})}_{6}}]C{{l}_{2}}\]

B)  \[N{{a}_{3}}[Fe{{F}_{6}}]\]

C)  \[[Cr{{({{H}_{2}}O)}_{6}}]S{{O}_{4}}\]  

D)  \[{{K}_{4}}[Fe{{(CN)}_{6}}]\]

Correct Answer: D

Solution :

Ferrocyanide ion \[{{[Fe{{(CN)}_{6}}]}^{4-}}\] is diamagnetic in nature hence \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] complex has zero magnetic moment.