09. COORDINATION COMPOUNDS (HM)
Explanation:
\(A{g_2}S + 4NaCN\)
\(\mathop {2Na\,\left[ {Ag{{\left( {CN} \right)}_2}} \right] + N{a_2}S}\limits_{{\rm{Sodium}}\,\,{\rm{dicyno}}\,\,{\rm{argentate}}} \)
\(2Na\,[Ag{(CN)_2}] + Zn \to \) \(\mathop {N{a_2}\,[Zn\,{{(CN)}_4}] + 2Ag \downarrow }\limits_{{\rm{Sodium}}\,\,{\rm{tetracyno}}\,\,{\rm{zincate}}\,\,{\rm{(ppt)}}} \)