The ligands which can get attached to the central metal ion through more than one atom are called

What is the coordination number of $Pt$ in cisplatin?

The molecular formula of a coordination complex is $CoH_{12}O_6Cl_3$. When one mole of this aqueous solution of the complex is reacted with an excess of aqueous $AgNO_3$ solution,$3$ moles of $AgCl$ are formed. What is the correct formula of the complex?

Which of the following complexes is heteroleptic?

Which of the following double salts does not exist?

Which of the following statements is incorrect?