Chemistry - Redox Reactions Question with Solution | TestHub

$\mathrm{N}\mathrm{a}\left[\mathrm{P}\mathrm{t}\mathrm{B}\mathrm{r}\mathrm{C}\mathrm{l}\right(\mathrm{N}{\mathrm{O}}_2\left)\right(\mathrm{N}{\mathrm{H}}_3\left)\right]$
Let x = oxidation state of Pt.
So$1(+1)+\mathrm{x}+1(-1)+1(-1)+1(-1)+1\left(0\right)=0$
Or x = +2.