Show that acids produce hydrogen gas when react with metals

Write an activity which proves certab,l bases produce hydrogen .gas when they react with metals.

How many of the following can produce hydrogen gas, when react with water Na,Cl_(2),CaF_(2),Mg_(3),N_(3),CaH_(2),CaC_(2)

Which substance liberates hydrogen when reacts with metals?

NaH produce H_(2) gas when

Which of the following produces H_2 gas, when reacts with acid ?

What gas is produced when magnesium is made to react with hydrochloric acid ?

Which of the following metal does not produces dihydrogen gas with dilute hydrochloric acid?

Which gas is evolved when an acid reacts with metal ?