Medium
Which gas is produced when a metal reacts with a dilute acid?
Explanation
Explanation
Metals react with dilute acids to displace hydrogen and form a salt, e.g. Zn + H2SO4 → ZnSO4 + H2↑. This hydrogen gas can be tested with a burning splint, which gives a characteristic 'pop' sound.
PRO TIP
Re-check your working by substituting the answer back into the original question.