Chemistry - Metallurgy Question with Solution | TestHub

$4\mathrm{Au}(\mathrm{s})+8{\mathrm{CN}}^{\ominus }(\mathrm{aq})+2{\mathrm{H}}_2\mathrm{O}(\mathrm{aq})+{\mathrm{O}}_2(\mathrm{g})\to 4{\left[\mathrm{Au}(\mathrm{CN}{)}_2\right]}^{\ominus }(\mathrm{aq})+4{\mathrm{OH}}^{\ominus }(\mathrm{aq})$

(Q) $2{\left[\mathrm{Au}(\mathrm{CN}{)}_2\right]}^{\ominus }(\mathrm{aq})+\mathrm{Zn}(\mathrm{s})\to {\left[\mathrm{Zn}(\mathrm{CN}{)}_4\right]}^{2\ominus }(\mathrm{aq})+2\mathrm{Au}(\mathrm{s})$

(R) (T) (Z)