what is the identity of the gas that is produced

Question

add 5 ml of hydrochloric acid to a test tube drop 3 small pieces of zinc into the test tube loosely cover the test tube with a cork to trap the gas that is evolved

Answer 1

The reaction taking place is 2HCl(aq) + Zn(s) ==> ZnCl2(aq) + H2(g)

The gas formed is hydrogen gas.