What is the oxidation number of gold in the complex $[{\mathrm{AuCl}}_4{]}^{–}$?

The oxidation number of $\mathrm{Ni} \text{in} \left[\mathrm{Ni}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_3{]}^{4–}$ is _____.

[BCECE 2015]

The CORRECT charge on and coordination number of$\text{'}\mathrm{Fe}\text{'} \text{in} {\mathrm{K}}_3\left[\mathrm{Fe}\right(\mathrm{CN}{)}_6]$ are ______ respectively.

[MHT CET 2017]

The sum of the coordination number and the oxidation number of the metal $\mathrm{M}$ in the complex $\left[\mathrm{M}\right(\mathrm{en}{)}_2\left({\mathrm{C}}_2{\mathrm{O}}_4\right)]\mathrm{Cl}$ (where $\mathrm{en}$ is ethylenediamine) is ______.

[AIPMT RE-TEST 2015]

Which of the following is a neutral complex?

Potassium ferrocyanide is a ______.

How many ions per molecule are produced in the solution when Mohr's salt is dissolved in excess of water?

[KCET 2015]

The $\mathrm{IUPAC}$ name of $\left[\mathrm{Co}\left(\mathrm{ONO}\right){\left({\mathrm{NH}}_3\right)}_5\right]{\mathrm{Cl}}_2$ is

The name of the complex ion ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3–}$ is