Solutions

When dissolves in , silver ions ( ) react with cyanide ions ( ) to form a soluble complex ion. The reaction involves the coordination of two cyanide ions around each silver ion, forming the complex ion . This is called the **dicyanoargentate(I)** ion.

The formation of the complex ion can be represented as:

The oxidation state of silver in the complex ion is , and the prefix "di-" indicates that two cyanide ligands are coordinated to the silver ion. Thus, the correct name of the complex ion is **dicyanoargentate(I) ion**.

Final Answer: The name of the complex ion is , which corresponds to option .