Question

Equal lengths of magnesium ribbons are taken in test tubes A and B. HCl is added to the test tube A while acetic acid is added to test tube B.In which test tube will the fizzing occur more vigorously?

• A. Test tube A
• B. Test tube B
• C. Both of the test-tube A and B
• D. None of the test tubes

Answer 1

The correct option is A

Test tube A

HCl is a strong acid whereas acetic acid is a weak acid.Being a strong acid, the hydrochloric acid solution contains a much greater amount of hydrogen ions in it due to which the fizzing will occur more vigorously in test tube A (containing hydrochloric acid).The fizzing is due to the evolution of hydrogen gas which is formed by the action of acid on the magnesium metal.