111.

Name a complex used in the treatment of cancer.

Give one example of chelate complex.

Write the name of any complex of copper in which the oxidation state of copper is one.

How many isomers are there for octahedral complex [CoCl₂(en)(NH₃)₂]⁺

Give one example of each complex in which sulphate ion acts as mondenate and bidentate ligand.

What is the rule for writing the names of different ligands (neutral, negative etc.) during the naming of complexes?

• [Cr(H₂O)₆]³⁺
• [Fe(H₂O)₆]²⁺
• [Zn(H₂O)₆]²⁺ 

What will be the correct for the wavelengths of absorption in the visible region for the following: , [Ni(NO₂)₆]^{4- _,}  [Ni(NH₃)₆]²⁺, [Ni(H₂O)₆]²⁺? 

Give one example each for inner orbital complex and outer orbital complex.