Question

Which of the following compounds will be repelled when placed in an external magnetic field?

• A. \(\text{Na}_2[\text{CuCl}_4]\)
• B. \(\text{Na}_2[\text{CdCl}_4]\)
• C. \(\text{K}_4[\text{Fe(CN)}_6]\)
• D. \(\text{K}_3[\text{Fe(CN)}_6]\)

Answer 1

The Correct Option is C

\(\text{K}_4[\text{Fe(CN)}_6]\)contains Fe²⁺ with a low-spin configuration due to the strong-field ligand CN−.It is diamagnetic due to no unpaired electrons, meaning it will be repelled by a magnetic field.