Which of the two is more stable K₄[Fe(CN)₆] or K₃[Fe(CN)₆].

Draw cis- and trans-isomers of [Pt(NH₃)₂Cl₂].

Write IUPAC name of K₃[Fe(C₂O₄)₃].

Give two complexes which are used in medicines.

A coordination compound has the formula CoCl₃.4NH₃. It does not liberate NH₃ but forms a precipitate of AgCl on treatment with AgNO₃ solution. Write the structure and IUPAC name of the complex.

Explain why chelating complex is more stable than unchelated complex?

Write down the IUPAC names of the following compounds:

(i) [CO(NH₃)₅ONO ]Cl₂     
(ii) K₃[Cr(CN)₆]

69.

Write the IUPAC name for  [Cr(NH₃)₅ CO₃]Cl.