Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Amount and concentration taken for both the acids are the same. In which test tube will the fizzing occur more vigorously and why?

Acetic acid (CH₃COOH) is weaker than HCl, HCl is a stronger acid. The production of hydrogen gas as a byproduct of the acid’s reaction with the magnesium ribbon causes fizzing. Since HCl is such a powerful acid, test tube A releases a lot of hydrogen gas. As a result, test tube A experiences increased fizzing.