Which would most likely be the pH of a highly-corrosive acid?

Acids have a pH below 7, and the lower the pH, the stronger and more corrosive the acid is likely to be. Of the choices, pH 1 is the lowest, so it is the most likely pH of a highly corrosive acid. pH 5 is less acidic, while pH 8 and 11 are basic.

AI-written and checked against the verified answer.