Question

Which of the following statements is incorrect
A. In `K_(3)[Fe(CN)_(6)]`, the ligand has satisfied only the secondary valencies of ferric ion
B. In `K_(3)[Fe(CN)_(6)]`, the ligand has satisfied both primary and secondary valencies of ferric ion
C. In `K_(4)[Fe(CN)_(6)]`, the ligand has satisfied both primary and secondary valencies of ferrous ion
D. In `[Cu(NH_(3))_(4)]SO_(4)` , the ligand has satisfied only the secondary valencies of copper

Answer 1

Correct Answer - A::D
In `K_(3)[Fe(CN)_(6)]` the ligand are negative which is present in coordination spheres shows a dual behaviour. It may satisfy both primary & secondary valencies while neutral ligand satisfies only secondary valencies.