Zinc metal on treating with sodium hydroxide produces

Zn Metal when react with NaOH. Metal will produce hydrogen gas and sodium zincate. 
Reaction : ${\mathrm{Zn}}_{\left(\mathrm{s}\right)}+2{\mathrm{NaOH}}_{\left(\mathrm{\alpha q}\right)}\to \underset{\text{ Sodium zincate }}{{\mathrm{Na}}_2{\mathrm{ZnO}}_{\left.2(\mathrm{aq}\right)}}+{\mathrm{H}}_{2\left(\mathrm{g}\right)}\uparrow$