The coordination number of $Cu$ in the complex $[Cu(H_2O)_4]^{2+}$ is:

Explain the following term with an example: Tetradentate ligands.

One mole of the octahedral complex compound $Co(NH_3)_5Cl_3$ gives $3$ moles of ions on dissolution in water. One mole of the same complex reacts with excess of $AgNO_3$ solution to yield two moles of $AgCl_{(s)}$. The structure of the complex is :

Which statement about the coordination number of a cation is true?

The coordination number and oxidation state of $Cr$ in $K_3[Cr(C_2O_4)_3]$ are,respectively:

What is the chemical formula of sodium nitroprusside?