Which of the following is a characteristic property of an acid?
- ATurn blue litmus paper red
- BHave a pH greater than 7
- CTurn red litmus paper blue
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) Turn blue litmus paper red
Explanation
Acids turn blue litmus red, taste sour and have a pH below 7.
Bases have a pH above 7 and turn red litmus blue. So only (a) is a property of an acid.