Chemistry - Metallurgy Question with Solution | TestHub

This reaction occurs as follows
$2\mathrm{N}\mathrm{a}\left[\mathrm{A}\mathrm{u}\right(\mathrm{C}\mathrm{N}{)}_2]+\mathrm{Z}\mathrm{n}\to \mathrm{N}{\mathrm{a}}_2[\mathrm{Z}\mathrm{n}\left(\mathrm{C}\mathrm{N}{)}_4\right]+2\mathrm{A}\mathrm{u}$
As zinc is more reactive so it can easily displace gold.