Name the gas evolved when zinc granules are treated/heated with: (a) Hydrochloric acid solution Sodium hydroxide solution

When zinc granules are treated with hydrochloric acid, hydrogen gas is liberated with zinc chloride Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)

When zinc granules are treated with sodium hydroxide, Hydrogen gas is evolved with sodium zincate Zn(s) + 2NaOH(aq) → Na2ZnO2(aq) + H2(g)