How would you prepare hydrogen in the laboratory?

Explanation

• Small amounts of hydrogen are conveniently prepared in laboratory by the reaction of metals, such as zinc, iron and tin, with dilute acid.
`Zn_((s))+2HCl_((aq))toZnCl_(2(s))+H_(2(g))`• In principle, any metal with a negative standard reduction potential will react with an acid to generate hydrogen.